Can you substitute 1 cup oat bran for 1 cup wheat flour?

You can substitute oat bran for wheat flour, but it will affect the texture and moisture of your recipe. Oat bran is denser and has a higher fiber content, so you may need to adjust the liquid ingredients and consider adding a binding agent, like an egg, for better structure. It’s best to start with a smaller ratio, such as 1/4 to 1/2 cup of oat bran for every cup of wheat flour, and adjust based on the results.