All-Purpose Flour with Vital Wheat Gluten (Best Option)
1 cup all-purpose flour + 1 tablespoon vital wheat gluten per 1 cup bread flourBread flour typically contains 12-14% protein, which is essential for strong gluten development in focaccia. All-purpose flour has a lower protein content (around 10-11%), so adding vital wheat gluten boosts the protein level to approximate bread flour. This ensures the dough can trap gas effectively, resulting in the characteristic airy, chewy texture.
When using this substitute, mix the vital wheat gluten thoroughly with the all-purpose flour before adding liquids. Watch hydration carefully, as the added gluten may absorb slightly more water. Knead adequately to develop the gluten network.
The final focaccia will have a texture and chew very close to that made with bread flour, preserving the traditional open crumb and elasticity.