In a large bowl mix 4 cups of spent grain, 2 cups of flour, 1 cup of peanut butter and 2 eggs - it's one heck of a thick dough, but use your muscles and you'll get through it.
Next, cut into shapes or just press into a cookie sheet. If you press into cookie sheet, use a butter knife to separate the biscuits into bit-size/treat-size pieces for your dog and cook at 350 for 30-45 minutes. Remove from oven and break apart the biscuits (unless you already cut them into shapes).
Return to oven, reduce heat to 250 and bake for a couple of hours until they are completely dried out.
If you're feeling spunky, go ahead and test out a biscuit prior to completely drying it out - not to bad for a dog treat!
She's one lucky Lady!