The pineapple-angel food cake is a world renowned weight
Another 2 ingredient easy dessert that also gets in a serving of vegetables:
One cake mix -- either chocolate or spice are good choices.
One 19 oz can of plain pureed pumpkin
Dump both into a bowl. Mix.
Bake at 350 in muffin tins until toothpick inserted comes out clean.
Freeze extremely well. Taste like fudgy brownies.