In another thread, we were talking about traveling light.
Being that I am in less than ideal shape, I also don't like carrying a lot of weight.
So I did some very unscientific research as to what food has the most calories per ounce. And what I came up with was peanut butter, and dried coconut chips. They both have about 200 cal per ounce.
I think pure fat would have about 230.
^ Not kosher!