There are five different kinds of flour that can be used in baking: graham, SOY, WHEAT, OAT, and RYE. Graham flour is a coarsely ground whole WHEAT flour, while SOY flour is made from ground soybeans. WHEAT flour is the most common type of flour used in baking, and is made from ground WHEAT. OAT flour is made from ground oats, and RYE flour is made from ground RYE grains. All of these flours can be used in baking to create different types of breads, cakes, and other baked goods.