I make the recipe on the Quaker Oatmeal box, substituting applesauce for the oil. They are really tasty and good fuel.

Another favorite is peanut butter/banana/honey burritos.
Flour tortilla, spread some PB, squirt some honey and lay a banana inside then roll it up like a burrito. Stick it in a ziplock and stuff it in your pocket.
Two hours later it's warm yummy gooey fuel.