bread flour substitute
for baking.

Semolina's coarse durum granules don't form smooth gluten on their own, so blend 75% semolina with 25% AP flour to get hydration through. Result is a yellow, slightly crunchy crumb that suits Italian pane di Altamura. Add 5% extra water and proof 20 minutes longer than a standard bread-flour loaf.

Spelt carries 13-15% protein but its gluten is fragile and tears under aggressive kneading — cut machine knead from 8 minutes to 4. Use 1:1 by cup, drop hydration 5%, and shape gently. Crumb comes out tender with a faintly nutty note; loaves don't rise as tall but hold shape.

Rye has almost no functional gluten — its pentosans bind water instead. Replace half the bread flour at most (50/50 blend); going further yields a brick. Expect denser crumb, faster fermentation because of higher amylase activity, and shorter proof times by 20-30 minutes at 75°F room temp.

Whole wheat absorbs 5-10% more water than bread flour because the bran is thirsty, so up hydration to 75% from 68%. Bran flakes also slice gluten strands, dropping rise by roughly a third. Autolyse 30 minutes before mixing salt to soften bran and recover some height in the finished loaf.

Oat flour is gluten-free, so cap it at half the bread flour or the loaf won't hold gas past 30 minutes proof. The remaining wheat carries the structure; oat adds moisture retention and a softer crumb that stays fresh a day longer at room temp wrapped in cloth.