I used to take a banana and cut it into 3 or 4 sections with the peel left on and put them in a plastic bag. Easy to fish out of a bag on the top-tube. Peel is bio-degradable, but I always tried to bring it back with me and dispose at home. Various granola bars and power bars were treat too, along with a snickers bar when temperature permits. I tried trail mix, but though I eat nuts of all sorts off the bike, they didn't like me on the bike. Currently I just take a box of raisins on trips of 50 or more miles. I tend to be happy with most of my carbs in my bottles. But if I didn't like putting carbs in my water, I suppose I'd be using Hammer's gels in their re-fillable flask. That is what my son likes to use.
Or maybe some of those strawberry jelly packets they used to give you at mcdonalds when you bought an egg mcmuffin.