Usually, when I prepare a dessert from scratch, I like to do it for real. My youngest requested these, though, so "all things in moderation" applies here. :)
Gooey butter cookies.
Add the box of cake mix (this is the part I don't prefer.... Pre-packaged cake mix means I'm cheating on the "from scratch" part, but whatevs.)
Scoop by tablespoon and bake for 10-12 minutes.
The recipe says to roll the cookies in powdered sugar before baking, but I skipped this step and heard no complaints.