This past month I found a dessert that fits that criteria. It's main ingredient is butter. (I told you it was good). Three cheers for the DreamGoddess at Food.com and her Pecan Pie Cupcakes.
The recipe is simple:
1 cup chopped pecans
1/2 cup flour
1 cup packed brown sugar
2/3 cup butter, melted
2 eggs
Mix everything up and fill your muffin trays 3/4 of the way full. Bake at 350' for 18 minutes. Makes approx. a dozen small cakes.
These were a huge hit with my husband. In fact, I'm glad I can hide them in the back of the freezer or he may have eaten them all on the first day. Warm with a scoop of vanilla ice cream this dessert is truly.. dangerously delicious.