Does anyone make their own protein bars?

[yankeedoobie]

I was recently diagnosed with a tree nut allergy. So, I am reading a LOT of labels now. I have not been able to find a protein bar (that is good for you) that does not contain some sort of tree nut or has not been processed with tree nuts. I am willing to make my own to be able to control the ingredients, but am having difficulty finding a "basic" recipe that doesn't have a lot of sugar/nuts involved. Anyone have one that I could tweak?

Thanks!