A Cooking Question:

I have dozens of baking mixes, especially for cakes, purchased when there was a good sale. Now my oven does not work properly. Does anyone have any tried and true recipes for alternative uses of these baking mixes?

Years ago, my mother in law gave me a recipe for peanut butter cookies that started with a cake mix. I lost my copy in one of many moves, and she doesn't have that recipe now either. If anyone does have such a recipe, I think cookies are easier than cakes to do in a half-dead oven. Also, I would welcome tested recipes for making pancakes, or for cooking these mixes in a toaster oven. I do not have a microwave, but I do have a slow cooker.
Please note that I am asking for tested recipes. I will welcome suggestions of things to try, but I would prefer to get at least one recipe that won't require a lot of experimentation to get it just right.