Bingo! COOKIES!
http://brooklynbrewshop.com/themash/9-spent-grain-cookie-recipes/
And how to make spent grain flour you can store and use in all sorts of recipes...
http://brooklynbrewshop.com/themash/recipe-spent-grain-flour
They look really good, one of them looks like baklava.
It might become the new trendy thing and will appear as the "in" ingredient to use on Masterchef.
Do you normally have to dry your grains out post mash in the oven to store them?