My father recently made the most ridiculously good cookies I've ever had. They're like cookie-cake-brownies. So soft, chewy, and chocolatey. And guess what? It starts with a devil's food cake mix. Wonder how it would be substituting different mixes. The super simple recipe is available at AllRecipes.com. Make it now. You won't regret it unless you have portion control issues. Then I'd suggest staying as far away from these as possible.