In order to turn your spent grain into a suitable flour with which to make bread, you'll need a few things:
- Spent grains, of course
- Cooking trays
- Oven with low heat settings
- Grain mill (or food processor)
- Mason jar (or other storage container)
Step 1: Dry the Grain
Turn your oven on to the lowest heat setting available. My oven goes down to 170 ºF, but lower works as well. You want to dry the grain without burning it. Make sure to leave your oven door cracked open to let the moisture out.
This drying process should only take a couple of hours. Stir the grain periodically and check how damp it is. When the grain is dry, it will be lighter weight, and crumble in your fingers.