What is bread flour?

Honey Whole Wheat and Oat Sandwich Bread | completelydelicious.com

Bread flour has a higher protein content than all-purpose flour, which helps with gluten development and makes it ideal for yeast bread baking. Breads baked with bread flour will rise higher and tend to have a chewier and more elastic texture.

However, while there may be a difference in the final baked bread depending on the recipe, you can substitute all-purpose flour for bread flour in most cases.