Pound cake For instance, baking soda or baking powder may be incorporated to induce leavening during baking, resulting in a less dense pound cake. A cooking oil (typically a vegetable oil) is sometimes substituted for some or all of the butter, which is intended to produce a moister cake. Sour cream pound cake is a popular variation in the United States, which involves the substitution of sour cream for some of the butter, which also is intended to produce a moister cake with a tangy flavor. Some of these variations may drastically change the texture and flavor of the pound cake, but
Butter lemon juice. Hollandaise and béarnaise sauces are emulsions of egg yolk and melted butter; they are in essence mayonnaises made with butter instead of oil. Hollandaise and béarnaise sauces are stabilized with the powerful emulsifiers in the egg yolks, but butter itself contains enough emulsifiers—mostly remnants of the fat globule membranes—to form a stable emulsion on its own. "Beurre blanc" (white butter) is made by whisking butter into reduced vinegar or wine, forming an emulsion with the texture of thick cream. "Beurre monté" (prepared butter) is melted but still emulsified butter; it lends its name to the practice of "mounting"