I want to try these soon!
Using standard salted butter instead of unsalted butter directly alters the final flavor balance because commercial cake mixes already contain significant sodium. Creaming the fat and cream cheese together incorporates trapped air bubbles, while chilling the dough for two full hours solidifies the fats so the cookies maintain shape rather than spreading flat into a single sheet during baking.
Commercial cake mixes rely on precise chemical leaveners and emulsifiers that cannot be replicated simply by mixing flour and cocoa powder without adjusting baking powder ratios. Cream cheese provides the distinct moisture barrier that keeps the interior tender, meaning lower-fat cream cheese blocks or whipped tub varieties will introduce excess water and ruin the final gooey texture. Ensure the butter reaches exactly 65 to 68 degrees Fahrenheit before mixing; overly melted fat prevents proper emulsion with the dairy solids.