On a long ride, say 2 passes and 100 miles into it, what I like is a nice Hostess fruit pie. It's the perfect thing. Paid for and down in 2 minutes and don't have to eat again for about 45. A Brit of all people taught me that.
I once ate a big muffin at a rest stop after the first century, paper and all. Probably a lot of nutrition soaked into that paper. One more muffin (paperless) and I was out of there. I've never eaten the Hostess wrapper. Plastic is yucky.