All-Purpose Flour with Vital Wheat Gluten (Best Option)
For every 1 cup bread flour, use 1 cup all-purpose flour plus 1 tablespoon vital wheat glutenBread flour is high in protein (typically 12-14%), which develops more gluten and gives banana bread a chewy, structured crumb. All-purpose flour has less protein (about 10-11%), so adding vital wheat gluten boosts the protein to bread flour levels, enabling similar gluten formation.
To succeed, mix the vital wheat gluten thoroughly with the all-purpose flour before combining with wet ingredients. Avoid overmixing the batter to prevent toughness.
The final banana bread will have a texture and rise very close to the original recipe using bread flour, with a slightly firmer crumb and good chewiness.