What it is
Fruit. The original snack food — the thing your lineage is built to chase.
Why your biology objects
Primates are frugivores, and equatorial ancestors had sweet fruit year-round. The fructose comes fiber-bound and ~1:1 with glucose, absorbed slowly enough that the liver never sees a free-fructose bolus. Domestication made it *better*, not worse — we bred out the bitterness and toxins and in the sweetness, the same selection that turned a poisonous wild almond edible. The only question is how much actual fruit made it into the recipe.