As most brands of mustard contain vinegar, it does have to be certified kosher as many vinegars are derived from grapes. Additional factors that could render mustard unkosher would be its preparation with utensils or on machines that are also used to process other [unkosher] products, or in a large industrial setting where unkosher products are processed nearby, and the steps taken to maintain separation between the production lines are inadequate to guarantee that the separation is never breached.
Depending on the brand, butter can be kosher or not kosher. However,
it is not hard to find kosher butter in your local supermarket.
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Butter originates as milk. There's nothing in it to make it non-kosher,
as long as it doesn't come in contact with other ingredients, or machinery,
used in non-kosher products.
Yes, however, dairy and meat cannot be combined in a single meal (for this purpose, poultry is considered meat).
If meat has been eaten, they must wait a certain amount of time after they eat before eating butter, which is dairy. The amount of time depends on the person's custom. Most observant Jews, wait 6 hours between meat and milk products like butter. The reverse is also true if one has eaten dairy. The wait after most dairy products, including butter, is normally 3 hours. Some hard cheeses require a waiting period of 6 hours.
Most brands. If you are in the USA, check the packaging for a kashrut symbol. Outside the USA contact your local Jewish community for a guide to kosher products.
It used to be that any butter could be assumed to be kosher, but that is no longer the case; modern production methods have introduced many ways in which butter can become treif if nobody is paying attention and making sure it's kosher.
Yes, butter cream icing is kosher - but fattening.
Yes, there are several brands of butter that are certified kosher.
It should be labeled as having had rabbinic supervision for Passover use.
No
There is nothing non-kosher in the ingredients for peanut butter and there are several brands of peanut butter that are certified kosher.
yes
Yes.
What?
Normal sugar is kosher.
Yes and no. There are many recipes that can be made kosher with kosher substitutes.
No kosher salt available
1) It must be made from the milk of a kosher animal. Butter made from camel milk, for example, is not kosher. (This is not usually a problem in the United States.) The only exception is mother's milk for a baby--but they don't generally make that into butter. 2) The equipment used to prepare it must be: A) Kept from contact with anything non-kosher; and B) Kept from contact with meat. 3) No non-kosher food or meat should contaminate the milk. (One would hope this were generally true for all butter!) 4) In order to guarantee that 1, 2 and 3 are followed, someone knowledgeable in the rules of kosher food must supervise the process. This is usually, but not always a rabbi.
Every butter, and almost all other purchased foods and drinks.
At the kosher butcher or grocery store.
Yes. Just buy kosher foods.
Yes, it is halal. They use microbial enzymes to make their cheese. Also, their butter is kosher and therefore their cheese is kosher too.