Just a suggestion:Unfortunately, I cannot do anything with the spent grains inside the house. "Someone" in our household does not like the smell of the mash, much less the boil. Which is why I do both outside. A lot of good ideas here for using them, though. Gotta think of some way to sneak them into food we eat without her knowing.
Thinking of using spent grains in bread reminds me of when I used to make the kids' school lunches when they were little. On tuna sandwich day, unbeknownst to them, I would mix a half cup of rolled oats in with a can of tuna, which after mixing in the mayo and putting it between two pieces of bread, looked and tasted enough like the 'real thing' that they never caught on. I could squeeze out 3 whole sandwiches from just ONE can of tuna! And still do to this day. They never knew. Until, that is... 10 years post-high school, one of my daughters was at our house to have lunch with us and since she hadn't had one in ages, I secretly made her one of my 'special' tuna salad sandwiches. She took a bite, stopped chewing, looked over at me with a frown and said very adamantly, "DAD!! What. Is. In. Here??!!" I said, "Whadaya mean, 'what's in there?'" She just sat there staring at me, half-angry and half-frightened with a huge immobile bulge in her cheek until I 'fessed up. When I did, she spit it out on the plate, screamed and jumped up from the table and ran to the sink to wash out her mouth! When I told her she had been eating that for all her life, she said, "DAD!!! that is SO GROSS!!!" Boy, talk about ungrateful!