Ok, so this isn't a game recipe (mods please pull if inappropriate), but it might help you get more game!
Bicycle Source has several recipes for energy bars. I've only personally tried the Corn Syrup bars. They are small, lightweight, last a long time even without refridgeration, and give a good boost of energy. Perfect for hunting / scouting that involves a lot of hiking.
Energy Bars And no, I'm not affiliated with Bicycle Source in any way.