No one better laugh at this question. It is a genuine question that I have received from folks so never be embarrassed to ask me a question even if you think it is silly. Cream of tartar does not have anything to do with tartar sauce. Tartar sauce is a condiment usually made from mayonnaise, pickles, and lemon juice (as you see here.) Cream of tartar is a white powder and is an acid commonly used as a leavening agent in baking. It is also sometimes added to recipes for egg whites to help them become more stable and create a fluffier meringue.