Preheat oven to 350
Mix cake mix, pumpkin puree and vegetable oil in mixer or stir by hand
Add pumpkin pie spice (if you aren't sure how much cinnamon flavor you want, add one tsp., then taste after all ingredients are mixed together. Add another if you want more cinnamon.
Mix until all ingredients are combined
Spoon batter into cupcake liners or muffin pan -- filling 3/4 high
Bake 350 for 15-18 minutes or until toothpick inserted comes out clean
cool on wire rack