When I get bored with Clif or Larabar, I'll switch to stuff from the dollar store: shortbread cookies that come six or eight to a pack, or stroop waffles. Fits easily into a jersey pocket, stays dry. Not as sweet as some energy bars.

If your digestion can handle sugar alcohols, maltitol is sometimes used as a sugar replacement in some cookies. Some folks find it better for energy food. You can buy a 12-16 oz package of faux-sugar wafers for a buck. Pretty cheap fuel.