I love simple good tasting recipes that I can make with easily attainable shelf stable and inexpensive ingredients. Are you kidding cakes are recipes dating probably from the 80's and what people now call dump cakes. Usually made with a bought cake mix and a can of pie filling and 3 eggs. That's it!
I grow lots of different fruits which means I always have pie fillings canned. So this is a simple cake for me. If I don't have the kind of fruit filling I want I can take frozen fruit and add sugar and corn starch and quickly make a filling on the stovetop.
I buy cake mixes when they are on sale. They must be under $1.00. Many times I buy them when they are $.50 or less. Then I take them out of the boxes to prevent pantry bugs and repackage in vacuum seal bags. I simply make a cut in the mix bag for the excess air to escape, cut out the directions and place in bag and seal. I label type, date I bought and expiration date. The reason I keep expiration date is that if it is beyond expiration I add a teaspoon of baking powder to the mix. These I keep in a large 5 gallon bucket with a gamma lid to keep out any bugs again or mice.
I add that to a greased 9 X 13 pan and put in a 350 degree preheated oven for about 35 minutes in my oven.