I'm a big fan of Brendan Brazier's "Thrive Diet" (not so much a diet in the conventional sense, but whatever). Anyhow, here are some of his recipes for energy bar and gels, I highly recommend checking out his books (especially the ones with recipes!):

http://recipes.sparkpeople.com/recip...?recipe=638287
http://vegzombie.wordpress.com/2010/...e-thrive-diet/
http://www.nomeatathlete.com/thrive-energy-gel-recipe/