Biscuits and cookies originate from different words meaning "twice baked" and "small cake" respectively. There are many varieties of cookies defined by their method of formation including dropping, rolling, pressing, and molding dough. Cookie mixing methods like creaming incorporate air for texture while rolled cookies are labor intensive. Precautions must be taken like quick mixing and releasing dough from pans to prevent sticking. Characteristics like crispness depend on factors like moisture, sugar, fat, and baking time.