1 box spice cake mix
1 (15 oz.) can solid pack pumpkin (not pumpkin pie mix)
1 teaspoon vanilla
1 teaspoon cinnamon
Preheat oven to 350 F degrees.
Spray a non-stick muffin pan with cooking spray. Mix cake mix, pumpkin, cinnamon and vanilla in a large bowl. An electric mixer may be helpful, since the mixture is very thick. Be careful not to overwork the dough or the muffins will be tough. Fill muffin cups 2/3 full.
Bake 20-22 minutes, until a toothpick inserted into one of the muffins comes out clean.
Let cool for 10 minutes.