Cooking apples are a type of apple that are used for baking and cooking. Biffin is a variety of cooking apple that is small, round, and yellow-green in color. Codling is another variety of cooking apple that is larger and more tart than the Biffin. PIPPIN is a third variety of cooking apple that is sweet and juicy. All three varieties of cooking apples are popular for use in pies, tarts, and other desserts.