Preheat oven to 325 degrees F

Combine the flour, spent grain, and salt in a bowl

Add one cup of the beer and mix into the dry ingredients.

Mix thoroughly until a shaggy mess has been made in the bowl. If it look like there isn't enough liquid, add a little bit of the remaining beer to the bowl. Keep mixing until the mixture looks like it will hold together but isn't soaking wet.

Dump the dough onto a work surface coated in flour. Kneed the dough until it forms a nice ball.

Cut the dough ball into manageable pieces (4 to 8 pieces)

Roll the dough balls to roughly 1/8 thickness (I prefer to use a pasta machine here and I'll take it to setting 3)

Place on to a baking sheet lined with parchment paper or a silpat.

Bake at 325 degree F for 25 to 35 minutes. Check regularly after the 25 minute.

Remove crackers from oven and let cool.