The best study done to date on hyperpalatable foods found that fat and sodium were the most common drivers of hyperpalatability:
https://onlinelibrary.wiley.com/doi/10.1002/oby.22639
> The HPF criteria identified 62% (4,795/7,757) of foods in the FNDDS that met criteria for at least one cluster. Most HPF items (70%; 3,351/4,795) met criteria for the FSOD cluster. Twenty-five percent of items (1,176/4,795) met criteria for the FS cluster, and 16% (747/4,795) met criteria for the CSOD cluster. The clusters were largely distinct from each other, and < 10% of all HPF items met criteria for more than one cluster.
(CSOD, carbohydrates and sodium; FS, fat and simple sugars; FSOD, fat and sodium; HPF, hyper-palatable foods.)
> Check out books by Robert Lustig on the subject
Lustig is a crackpot who relies on animal studies and mechanistic speculation, because the highest-quality RCTs (like the ones I cited) don't support his theory.