Preheat oven to 350ºF. Combine the pumpkin, egg, and spice cake mix. Add chocolate chips.
Use a pastry bag to fill muffin liners. Cook for 20 minutes. Let cool on wire rack for 25 minutes or until completely cool.
The batter will come out EXACTLY like you put it in the oven. Smooth the tops with a spatula or use a pastry bag prior to baking.