Asking for a special favor. Will someone who is about to make a box mix cake, measure the volume of the dry mix and let me know? I am trying to convert the Gooey Butter Cake recipe to gluten free. The recipe calls for a cake mix. I used the dry ingredients for my best gluten-free cake and the gooey cake turned out tasty, but I had to move it from the size pan called for into my largest baking dish and then double the topping. Not only was it a big cake, it was thick. The gooey cake I've seen has been thin, like a brownie. So. I think it is pretty obvious that my dry ingredients measured a lot more than the dry ingredients in a cake mix and I need to reduce the amount.