gluten flour (optional

Gluten flour, also known as vital wheat gluten or seitan flour, is a concentrated protein extract derived from wheat endosperm through a washing and drying process. This refined ingredient contains approximately 75-80% protein by weight, with most of the starch and bran removed. It is a pale, powdery substance with a neutral flavor and elastic binding properties when hydrated. The high gluten content makes it particularly useful for commercial and home food applications requiring enhanced dough strength and chewiness.

Gluten flour is primarily used as a dough strengthener and texture modifier in bread baking, where it increases extensibility and elasticity while improving crust color and volume. It is essential in the production of seitan (wheat meat), a vegetarian protein source made by hydrating gluten flour with water and seasonings, then cooking the resulting dough. Additionally, it serves as a binder in processed foods, improves the texture of whole grain breads by compensating for lower gluten content, and is used in specialty applications such as low-carbohydrate baked goods and high-protein products. Home bakers often add small quantities (1-2% by flour weight) to enhance bread structure without affecting flavor.