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The Torah Learning Library of Yeshivat Chovevei Torah

Category: Food & Kashrut

Why Can My Pot Be Treif?

by Rabbi Dov Linzer
Posted on December 10, 2010

Previously we discussed the principle of ta’am lifgam – when the addition of a forbidden food to a mixture makes the mixture taste worse.  In such a case, the mixture may be eaten, because while the forbidden food itself, even if it has an off-taste, is forbidden, when we are only dealing with the taste of such food, and not the food itself, this bad taste is not forbidden.   …

Is a Bad Tasting Food Mixture Treif?

by Rabbi Dov Linzer
Posted on December 3, 2010

In Yoreh Deah we learn about ta’am ki’ikar, the prohibition to eat a mixture of food that has in it the taste of a forbidden food, as we addressed the major exception to this principle: ta’am lifgam, when the forbidden food imparts a bad taste to the mixture. …

Hilkhot Kashrut: Forbidden Today, Permitted Tomorrow

by Rabbi Dov Linzer
Posted on November 18, 2010

The Gemara rules that a davar she’yesh lo matirin, something that is forbidden now but will be permissible later – like an egg that was born on Yom Tov, and is nolad (a type of muktzah) and cannot be eaten on Yom Tov, but can be eaten the following day, is not batel.…

Bugs in the Broccoli: The Concept of Biryah

by Rabbi Dov Linzer
Posted on November 12, 2010

Among the things that cannot be nullified when they exist in a mixture are things that are considered a biryah, or “whole entities”.  The Gemara in Hullin (99b) states this in reference to the gid hanashe, the forbidden sinew, in just two words – biryah shani – an entity is different (and not batel, nullified). …

When Bacon Falls on the Food: Is Taste or Quantity the Issue?

by Rabbi Dov Linzer
Posted on October 22, 2010

If there is a mixture of kosher and non-kosher food, how are we to determine whether the non-kosher food can be tasted?  The Mishna and Gemara speak of two ways to measure this – one, by actually tasting – te’ima, and the other, by a quantitative approximation – the standard of 1/60th.  …

When Bacon Falls on the Food: How Treif is Taste?

by Rabbi Dov Linzer
Posted on October 15, 2010

While in our previous study of Kashrut we studied the concept of yavesh bi’yavesh – mixtures of distinct entities, here we address the more common case of lach bi’lach -mixtures in which the forbidden food is totally intermixed with, and whose taste is completely dispersed within, the permissible food.  …

When Bacon Falls on the Food: Bitul of Dry Food

by Rabbi Dov Linzer
Posted on October 8, 2010

The underlying principle of almost the entire field of practical Kashrut is that of bitul – the ability of a food to be considered “nullified” when it is mixed with other foods, assuming that it does not impart any taste, that it is not noten ta’am.…