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October 14, 2025

Whole grain hydration, the math no one explains

Whole-grain hydration is not the same number as white-flour hydration.

Every recipe online says "75% hydration" and you mix it and it feels like 60%. Stiff, tight, no slosh. This isn't your kitchen scale lying. It's the flour.

Whole-grain flour drinks water differently. The bran and germ are still there, and they absorb moisture slowly — sometimes over hours. So at 75% you start out feeling dry. An hour in, the dough has loosened. Three hours in, it's slack.

What I do:

  1. Mix at the listed hydration
  2. Wait 60 minutes (this is the autolyse you didn't know you needed)
  3. Then decide if you need more water
  4. Add water in 5g increments, mixing by hand each time

For 100% whole wheat at 75% on the bag, I usually end up at 78–82% by the end. For a 50/50 blend, 76–78%.

The dough will keep telling you what it wants. The recipe is a starting point, not an ending one.

— Sarah