Author Archives: Rabbi Moshe Heinemann

The Mitzvah of Tevilas Keilim

By: Rabbi Moshe Heinemann

Spring 2025

We are an Am Kadosh, a Holy People, who are mandated by Hashem to imbue all aspects of our lives with holiness. We elevate even the mundane activity of eating and vest it with special kedusha (sanctity): the food on our plates must be kosher and the table on which we eat is likened to the holy mizbe’ach. The plates themselves, and all keilim (vessels and utensils) used to prepare our food, must likewise be infused with kedusha.

Just as an aino Yehudi must tovel in a mikvah in order to become Jewish, so too must keilim acquired from an aino Yehudi undergo tevila in a mikvah before being used by a Jew. This is the mitzva of tevilas keilim.

If a kli requires tevila, it may not be used even once before it is toveled. If a kli was used numerous times without tevila, one is still required to immerse […]

Wireless Security: A Mezuzah Primer

By: Rabbi Moshe Heinemann

Kashrus Kurrents, Spring 2022

Many people install alarm systems in their
homes to provide a sense of security. These systems, which may be wireless or
hard-wired, are dependent on a number of factors to operate properly: all contacts
need to be intact and connected to one another; all batteries in wireless
systems must be fully charged; the codes need to be properly set; and the entire
unit must be in good working order. All it takes is one faulty connection to
negate the whole system.

While installing man-made security systems on
our property is a reasonable act of hishtadlus, our true feeling of
security comes from the recognition that we have a Protector in heaven. The
Torah provides us with a spiritual security system: the
mezuzah attached to our doorpost. The Ribono
Shel Olam watches over our homes if we do His will, and our mezuzah is a direct
link to the ultimate ‘Central Station.’

Our
homes are protected, however, only if the mezuzah […]

Preparing & Kashering the Pesach Kitchen

By: Rabbi Moshe Heinemann

Reviewed January 2025

Download PDF of Article Here

As the Yom Tov of Pesach nears, and the diligent balabusta begins to tackle the challenge of preparing the kitchen for Pesach, undoubtedly the light at the end of the tunnel is beginning to shine. Although moving into a separate Pesach home sounds very inviting, such luxuries are often not affordable and definitely not in the Pesach spirit. Among the basic mitzvos of the chag is the mitzvah of tashbisu se’or mibateichem, ridding one’s home and possessions of chometz. However, if we are to use kitchen equipment, utensils, or articles that can be found in our kitchen year-round, it may be insufficient to just clean them thoroughly. One is forbidden to use these items unless they have been especially prepared for Pesach. This preparation process is known as kashering.

The Torah instructs us that the proper kashering method used to […]

The Mitzvah of Tevilas Keilim

By: Rabbi Moshe Heinemann

Reviewed February 2023

Click HERE for a convenient summary of tevilas keilim guidelines and HERE for a handy chart.

Introduction:
In His infinite wisdom, Hashem Yisborach has spiritually elevated the mundane activity of eating and has vested it with special sanctity, kedusha. The food we eat must be kosher, the table upon which we eat our meals represents the holy altar, the mizbeach. Similarly, the vessels and utensils (keilim) used for preparing food and for dining must be given special holiness. When these dishes and/or utensils have been previously owned by an aino Yehudi, we have to immerse these keilim, in a mikvah before their first use.

Keilim (vessels/utensils) can be categorized into three halachic groupings; utensils requiring tevila (immersion) with a brocha: utensils requiring tevila without a brocha; and utensils not requiring tevila at all. Utensils require tevila with a brocha when they have direct contact with food during preparation […]

How to Check Matzos

By: Rabbi Moshe Heinemann

Reviewed January 2025

Download PDF of Article

The production of Kosher l’Pesach (KFP) matzos involves a great deal of meticulous work. The process begins with the inspection of wheat kernels to ensure that they have not been adversely affected by moisture in the air or prematurely sprouted. Grinding of the grain must be performed according to the dictates of Halacha, which precludes any pre-grind soaking of the grain and requires special preparation of the milling equipment to ensure that no contamination exists from non-Passover flour in the grinders and filters. The KFP flour is then loaded onto trucks, either pneumatically or in bags under controlled conditions, and shipped to the bakeries.

A bakery which has been kashered for Pesach will have already prepared special water (mayim shelanu) to be used for Pesach matzos. Hand matzah bakeries do not use regular municipal water for fear that the […]

Undercover: The Halachos of Schach

By: Rabbi Moshe Heinemann

When our הרות speaks about the Festival of סוכות it states,חג הסוכות תעשה לך באספך מגרנך ומיקבך”,1″ “The סוכות holiday should be observed at the time that you harvest your grain and your wine,” during the fall. Our חכמים have taught us that this קוספ has another interpretation. The סוכה, in which we dwell during this חג , should be made from the unused parts of the harvested grain and wine, namely the stalks of grain and twigs of the vine. These are the items that should be used for the סכך, the covering, which is placed on top of the סוכה instead of a permanent roof.

Our rabbis have further taught that this directive, פסולת גורן ויקב, includes other items that are similar to stalks and twigs that are no longer attached to the ground and cannot become ritually impure, טמא. Unfinished wood slats, corn stalks, and palm branches are […]

Undercover: The Halachos of Schach

By: Rabbi Moshe Heinemann

Fall 2009

When our Torah speaks about the Festival of Sukkos it states, “Chag HaSukkos Taaseh Lecha B’Aspecha Migornecha U’Miyikvecha.”1 “The Sukkos holiday should be observed at the time that you harvest your grain and your wine,” during the fall. Our Chachamim, sages, have taught us that this pasuk has another esoteric meaning. The sukkah, in which we dwell during this chag, should be made from the unused parts of the harvesting grain and wine, namely the stalks of grain and twigs of the vine. These are the items that should be used for the schach, the covering, which is placed on top of the sukkah instead of a permanent roof.

Electric Shavers

By: Rabbi Moshe Heinemann

Since Star-K often receives questions regarding the use of electric shavers, this article will address the halachic concerns of removing one’s facial hair. The Torah states, “לא תקפו פאת ראשכם ולא תשחית את פאת זקנך” (ויקרא י”ט כ “Do not round the corners of one’s head and do not destroy the corner of one’s beard” . The Torah continues, “ופאת קזנם לא יגלחו (ויקרא כ, “and the corner of one’s beard they shall not shave”.

What are the actions of forbidden facial hair removal? The Mishna in מכות discusses which methods of removing facial hair are forbidden. הקפה, “rounding”, refers to the complete removal of hair from the temple area. The terms גילוח, “shaving”, and השחתה , “destroying” refer to forbidden forms of removing one’s beard.

The Mishna does not offer a practical explanation of these actions. Do these terms refer to the cutting of hair using different types of shaving implements, or do these actions refer to different degrees of hair removal […]

Sheimos Guidelines

By: Rabbi Moshe Heinemann

Updated June 2024

Download PDF of Chart Here

The Torah forbids discarding objects with innate kedusha (holiness) into the trash or recycling bin. Objects which have innate kedusha must be placed in sheimos, which must be buried.

(Objects that acquire kedusha after being used for a mitzvah do not need to be placed in sheimos but do need to be disposed of with special sensitivity. This is discussed further below.)

SHEIMOS: Disposing of Objects with Kedusha

The following objects are included in this category:

Any of the names of Hashem

Sefer Torah or Sefer Torah cover

Seforim, whether handwritten, printed, photocopied, or downloaded and printed (e.g., Chumashim, Siddurim, Machzorim, Gemara, Shulchan Aruch, etc.)

Bentchers

Pages of a sefer that became detached or fragments of a sefer, even if there is no writing or print on them

A sefer’s cover that has been removed from the sefer

Binding tape that became detached from a sefer

Printed material primarily […]

Terumos and Ma’asros

By: Rabbi Moshe Heinemann

INTRODUCTION
Eretz Yisroel has the unique privilege of being the recipient of the Ribono Shel Olam’s brochos throughout the year. Its agricultural industry continues to grow and flourish. Some consumer products imported from Eretz Yisroel, such as Jaffa oranges and grapefruits, are very well known to the American marketplace while other products including clementines, carrots, red peppers, jams, jellies, tomatoes, olives, and pickled products are not as familiar. Finally, there are a host of industrial products like orange oil, lemon oil and parsley that provide a steady supply of raw materials.

Besides all the general consumer kashrus concerns regarding ingredients, processing and certification, there are additional kashrus requirements that apply to foods grown and produced in Eretz Yisroel. For instance, one must be sure that terumos and ma’asros have been properly separated before consumption. Furthermore, one needs to ensure that the fruits do not come from trees that violate the conditions […]

Kashering Liver

By: Rabbi Moshe Heinemann

Published Spring 2016

Before one is permitted to indulge in kosher Jewish delicacies such as chopped liver, liver steaks and onions, or sauteed chicken livers, raw liver must undergo various processes before the liver is deemed fit for kosher use. First, as with all kosher meat, the liver must come from a kosher species of animal or fowl that has been schechted, slaughtered, in the proper manner prescribed by the Torah. If it is an animal liver, all the fat must be meticulously removed. Furthermore, the Torah forbids eating the blood of an animal or bird. Therefore, it is necessary to extract the blood from the kosher slaughtered meat or liver.
How is the blood removed? With meat, this process is commonly known as kashering and is accomplished by soaking the meat in water, salting it, and then rewashing it. With liver, this method of extraction is insufficient. Since liver contains such a large concentration of […]

Making the Cut: Assuring that Glatt Really Means Kosher

By: Rabbi Moshe Heinemann

Winter 2016

It is written in our Torah, “Ubosor basodeh treifa lo socheilu” (Shmos 22:30), it is forbidden to eat treif meat. While the expression “treif” (non-kosher) has become the universal connotation for food that is not kosher, in truth, the word treif specifically refers to an animal whose flesh was torn or ripped. Technically speaking, if a kosher species of animal or fowl was attacked by a predator, the meat of the victim may be deemed treif. However, the meat of an animal improperly kosher slaughtered is not treifah, it is called a neveila. Technically, meat of a non-kosher animal species is the meat of a temeiah. Yet, the term “treif” has found its way through the portals of the slaughterhouse, as well as the aisles of the non-kosher meat section of the supermarkets. No matter what the name, all of these categories of meat are forbidden to be eaten.
[...] Read More

Food Fit for a King: Reviewing the Laws of Bishul Akum and Bishul Yisroel

By: Rabbi Moshe Heinemann

Published Spring 2014
It is not uncommon for food manufacturers to call us with a keen interest in kosher certification without the the slightest idea what it takes to produce a kosher product. What complicates matters is that they would like to have a kashrus tutorial capsulized into a telephone conversation. Obviously, we can’t give a thorough kashrus course over the phone, but we can categorize practical kashrus into three main areas: ingredients, equipment, and process.Occasionally, there may be circumstances where both ingredients and equipment are 100% kosher. Through a violation of a rabbinic ordinance, some foods or food products would be prohibited, while other food products undergoing the very same process would […]

Security

By: Rabbi Moshe Heinemann

Published Spring 2015

In these turbulent times, many people have installed alarm systems in their homes which give them a sense of security. There are various types of burglar alarms which may or may not be connected to a central system, and it is clear that the system will work only if all is intact, the component codes are set in the right sequence, and the unit is in working order. It is a good idea to test it every now and then to make sure the system is in proper operating condition. All it takes is one faulty connection to negate the whole system.

Our feeling of security should come from the recognition that we have a protector in heaven, rather than relying entirely on some mechanical device devised by man. The Ribbono Shel Olam watches over our homes if we do His will. The mezuzah attached to our doorpost is our protection. It is a direct link to the “Central System”. Certain letters […]

Mitzvos on the Fringe

By: Rabbi Moshe Heinemann

Just as the Torah carefully directs us in the arena of kosher diet, what we can and cannot eat, how food may and may not be prepared, and what foods are considered required eating, similarly, the Torah provides us with a kosher dress code regarding the clothing we wear, what fabrics or combination thereof may or may not be used, how clothing should or should not be worn, and what styles of clothing are recommended. One of the Torah‘s great “how to” mitzvos is the mitzvah of tzitzis. The Torah instructs us to insert specially wound fringes onto the corners of any four cornered garments where the corners surround the wearer.

FOOD FIT FOR A KING: Reviewing the Laws of Bishul Akum & Bishul Yisroel

By: Rabbi Moshe Heinemann

It is not uncommon for food manufacturers to call us with a keen interest in kosher certification but who don’t have the slightest idea what it takes to produce a kosher product. What complicates matters is that they would like to have a kashrus tutorial capsulized into a telephone conversation. Obviously, we can’t give a thorough kashrus course over the phone, but we can categorize practical kashrus into three main areas: ingredients, equipment, and process.

Cholov Yisroel: Does a Neshama Good

By: Rabbi Moshe Heinemann

There is a general rule in Halacha, Jewish Law, governing natural derivatives from Kosher and non-Kosher animals. Kol hayotzei min hatahor tahor, vichol hayotzei min hatamei tamei. Derivatives from a Kosher species are Kosher, while derivatives from a non-Kosher species are not. Therefore, milk produced by Kosher mammals, such as cows, goats, and sheep, are considered Kosher, while milk from non-Kosher mammals, such as horses, pigs, camels, or whales, are forbidden.

Terumos and Ma’asros

By: Rabbi Moshe Heinemann

Published Spring 2002 | Updated August 2024

Eretz Yisroel has the unique privilege of being the recipient of the Ribono Shel Olam’s brachos throughout the year. Its agricultural industry continues to grow and flourish. Consumer products from Israel that are exported to the American marketplace include Jaffa oranges, grapefruits, pomelos, clementines, carrots, parsley, Carmel and canned tomatoes, peppers, candies, jams, jellies, olives and pickled products. Industrial products used for manufacturing include tomato sauce, tomato paste, orange oil, lemon oil and spices.

Besides for all the ingredients and processing concerns which confront the kosher consumer, additional kashrus requirements apply to foods grown, produced or imported from Israel. A consumer must be sure that terumos and ma’asros have been properly separated before eating, and that the fruits do not come from trees that are orla or neta revai or shemita.

What Are Terumos and Ma’asros?

Terumos (literally, separations) and ma’asros (literally, a tenth) were compulsory […]

Kashering Liver

By: Rabbi Moshe Heinemann

Before one is permitted to indulge in kosher Jewish delicacies such as chopped liver, liver steaks and onions, or sauteed chicken livers, raw liver must undergo various processes before the liver is deemed fit for kosher use. Firstly, as with all kosher meat, the liver must come from a kosher species of animal or fowl that has been schechted, slaughtered, in the proper manner prescribed by the Torah. If it is an animal liver, all the fats must be meticulously removed. Furthermore, the Torah forbids eating the blood of an animal or bird, therefore, it is necessary to extract the blood from the kosher slaughtered meat or liver.

The Tell Tail Sign

By: Rabbi Moshe Heinemann

Our Rabbis in their sage understanding of human nature tell us, “Al tistakel b’kankan elah b’mah sheyaish bo.” Do not look at the outer receptacle, look at its inner contents. This adage has often been loosely translated into the famous American adage, “Don’t judge a book by its cover.” In the case of kosher fish supervision, in order to determine whether the fish is, indeed, kosher it has to be judged by its cover.

The Torah states clearly how one is to determine whether or not a fish is kosher. If the fish has ‘snapir v’kaskeses’, fins and scales, the fish is kosher. Fish that have only fins, such as catfish, or totally smooth skin, such as eel, or crustaceans, such as lobster, are non-kosher.

Fish production is an active global enterprise. Nile perch from Nairobi, tuna from Fiji, farm-raised salmon from Chile and flounder from China arrive daily to fish companies […]

Kosher Chickens: From Coop to Soup

By: Rabbi Moshe Heinemann

Published Spring 2007

There is a strange but true phenomenon that has resulted in our society’s technologically
motivated, highly competitive marketplace. If a manufacturer or producer desires to remain viable and competitive, he never loses sight of the fact that successful business demands innovation, creativity and growth. Status quo in the manufacturer’s lexicon often means stagnation, and no company wants to stagnate. In turn, the manufacturer on the move continues to innovate in an environment that encourages survival of the fittest. This presents additional challenges for products requiring kosher supervision from a kashrus agency. These axioms are very keenly felt in the production of kosher poultry, where halachic ingenuity and technological advances converge. The average kosher consumer rarely, if ever, has the opportunity to see a large or small slaughterhouse in action. Therefore, Kashrus Kurrents offers its readers an inside look at the policies and procedures of […]

Beware: Glatt May Not Always Mean Kosher

By: Rabbi Moshe Heinemann

Published Summer 2008

It is written in our Torah, “Ubosor basodeh treifa lo socheilu” (Shmos 22:30), it is forbidden to eat treif meat. While the expression “treif” has become the universal connotation for food that is not kosher, in truth, the word treif specifically refers to an animal whose flesh was torn or ripped. Technically speaking, if a kosher species of animal or fowl was attacked by a predator, the meat of the victim may be deemed treif, non-kosher. However, the meat of an animal improperly kosher slaughtered is not treifa, it is called a neveila. Technically, meat of a non-kosher animal species is the meat of a temeiah. Yet, the term “treif” has found its way through the portals of the slaughterhouse, as well as the aisles of the non-kosher meat section of the supermarkets. No matter what the name, all of these categories of meat […]

Electric Shavers

By: Rabbi Moshe Heinemann

Published Spring 2012

Since the Star-K often receives questions regarding the use of electric shavers, this article will address the halachic concerns of removing one’s facial hair. The Torah states “לא תקפו פאת ראשכם ולא תשחית את פאת זקנך” , Do not round the corners of one’s head, and do not destroy the corner of one’s beardויקרא י”ט כ) ). The Torah continues, “ופאת זקנם לא יגלחו” (ויקרא כ”א ה ) and the corner of one’s beard they shall not shave.

Oven Kashrus: For Everyday Use

By: Rabbi Moshe Heinemann

Hashem, in His eminent act of chesed, created a world with abundant gifts expressly designed for the enjoyment of man. The Torah often limits, directs or restricts these worldly opportunities afforded to us to help us remember that we do not own this earthly bounty, instead we are using them with the permission of their Owner.

Guide to STAR-K Certified Schach

By: Rabbi Moshe Heinemann

August 2013

STAR-K currently certifies schach made from bamboo slats held together with monofilament type cord for use during Sukkos. The following is an explanation of the psak of Rabbi Moshe Heinemann regarding this item:

In Hilchos Sukkah (Shulchan Aruch, Orach Chaim 629:1) it is written that schach can not consist of something that is “mekabel tumah” (something that has the ability to become ritually impure). It is for this reason that bamboo carpet mats cannot be used for schach as they are mekabel tumah. All Star-K certified schach is not made to sit or walk on and is therefore not mekabel tumah.

In addition, l’chatchila, kosher schach may not be supported by anything which is mekabel tumah (see Rama O.C. 629:7). According to the opinion of Rashi (as brought in Shaar Hatziyun 629:20) spun or woven threads (e.g. string, yarn) are mekabel tumah. Rav Moshe […]

Matzo: How it is made and how to differentiate between those that are acceptable and forbidden for use.

By: Rabbi Moshe Heinemann

The production of matzos Kosher for Pesach (KFP) involves a great deal of meticulous work. The process begins with the inspection of wheat kernels to ensure that they have not been adversely affected by moisture in the air and have not prematurely sprouted. Grinding of the grain must be performed according to the dictates of Halacha which preludes any pre-grind soaking of the grain and which requires special preparation of the milling equipment to ensure that no contamination exists from non-Passover flour in the grinders and filters. The KFP flour is then loaded onto trucks either pneumatically or in bags under sheltered conditions and shipped to the bakeries.