Try this Reese's Gooey Cake Bars recipe, or contribute your own.
A crust of dense chocolate dough encases whole peanut butter cups while sweetened condensed milk bakes down into a concentrated, viscous layer. Baking commercial cake mixes with added dairy fats alters the standard crumb structure, shifting the result from a spongy cake toward a fudgy bar. Mastery of this dessert relies entirely on thermal management and cooling phases.
Proper containment preserves moisture over multiple days at room temperature. Storing the portions in an airtight container prevents exterior hardening while maintaining the interior chew.