A box of cake mix, 3 eggs, 1/3 cup oil and a can of pie filling.
Triple Fudge w/cherry pie filling and walnuts (did that one today in a bundt pan with fudge frosting)
Spice w/ apple 9x13
Caramel w/ apple 9x13 - These two need cooked brown sugar frosting - wonderfully good
German Chocolate w/apple - Made that first 43 years ago - very good
White w/ cherry filling and nothing else in a 9x13. Serve with Cool Whip - very pretty and surprisingly moist
You get the idea. I did have to add a little extra liquid today, but usually don't. BTW, I never use canned frosting. Cake mixes, yes, but canned frosting tastes as bad as it smells to me.