🧁 What brand cake mix to use You can use the cake mix of your choice, but they may all perform a little bit differently. I've made these brownies with both Duncan Hines's Devil's Food and Betty ...

Transfer batter to a greased 8 X 8 baking dish. Bake the brownies at 350 degrees for 20 - 25 minutes, until a toothpick inserted comes out clean. Don’t overbake.

The batter is fully mixed when no dry spots of brownie mix remain. Don’t overmix this batter—brownies work best when they’re mixed by hand just until everything is fully combined.