Mashed potatoes are really nice just about anytime.
You take potato and mash, make good potato. Cook before mash for best result, no worry about skill, boil or bake, potato best dessert. Who need seasoning when you have potato. Potato cheap, no worry about capitalist dessert. Potato good, eat more potato....
In all seriousness though, a homemade swiss cake roll sounds amazing.
Thin chocolate cake rolled around vanilla frosting and a caramel drizzle over the top.