The term 'bakery staple' refers to the essential ingredients used in baking. CAKE, YEAST, FLOUR, and RYE are all common ingredients found in many bakeries. CAKE is a four-letter word that is a sweet, usually layered or filled, dessert made from FLOUR, sugar, eggs, and butter. YEAST is a five-letter word that is a single-celled organism used in baking to cause dough to rise. FLOUR is a five-letter word that is a powder made from grinding grains, such as wheat, and is used to make breads and other baked goods. RYE is a three-letter word that is a type of grain used to make breads and other baked goods. All of these ingredients are essential for baking and are considered bakery staples.