The simple trick to turning the cakey Ghiradelli brownies mixes (bulk from Costco) into a HEAVENLY pan of thin fudgy chewy brownies (the way real brownies are suppose to taste!) I've been working with this recipe and I have perfected it!
something easier, dear cake-lovers. Swap all but the cake mix for a bottle of soda. Stir 12 ounces of a carbonated beverage into your prepackaged cake flour, plop the mixture into a pan and bake it in the oven as directed on the box.