I've long contended that cooking with high amounts of fat and sugar is cheating. It's too easy to make something taste good, whether it be a brownie or a sauce, if you load it with fat and sugar. Well, I was right. Check out the posts below on food reward. The addition of excess fat and sugar provides an incredibly high food reward. The food tastes great, has desirable texture, and contains a macronutrient ratio that optimizes the eater's psychological enjoyment.

Here is the food reward series as it currently stands: Part 1; Part 2; Part 3.