Quick bread leavening agents include a weak base, such as baking soda (sodium bicarbonate) plus a weak acid, such as cream of tartar, lemon juice, or cultured buttermilk, to create an acid–base reaction that releases carbon dioxide. (Quick bread leavened specifically with baking soda is often called "soda bread".) Baking powder contains both an acid and a base in dry powdered form, and simply needs a liquid medium in which to react. Other alternative leavening agents are egg whites mechanically beaten to form stiff peaks, as in the case of many waffle recipes, or steam, in the case of cream puffs. Nevertheless,
Buttermilk pie allowed to cool, but may be eaten either warm from the oven or after being chilled. Buttermilk pie Buttermilk pie is a custard-like pie. Originally from the United Kingdom, it is now a traditional pie of the southern United States. It is similar to, and sometimes confused with, chess pie but it does not include cornmeal. The basic filling consists of a mixture of sugar, butter, eggs, buttermilk and wheat flour. Variations on the recipe may include flavorings such as vanilla, lemon zest and nutmeg. Buttermilk pies are made with a pie crust. The filling is poured into the crust