I've made these twice this fall and they are so yummy.
Ingredients:
1.5 cups all-purpose flour
1 tsp baking powder
1 15 oz. can pumpkin (actual pumpkin, not canned pie filling)
1/3 cup vegetable oil
2 large eggs
1 tsp pumpkin-pie spice (a combo of cinnamon, nutmeg, cloves, ginger, and allspice)
1.25 cups plus 1 tbsp sugar
1/2 tsp baking soda
1/2 tsp salt
1 tsp cinnamon
Method
Preheat oven to 450 degrees and either line or grease 18 cups of regular sized muffin tins. Combine flour and baking powder in a small bowl. In a separate, larger bowl,mix together all other ingredients except for the 1 extra tsp. of sugar and the cinnamon. Then, add in flour/powder mixture to the wet mixture. Fill each muffin cup 2/3 full. In another small bowl, mix together extra sugar and cinnamon. Sprinkle the top of each filled cup with this mixture.
Before putting the tins in the oven, turn it down to 350 degrees. Hiking the temp up before baking and then putting where it should be apparently makes for good, peaky muffin tops. Bake for about 25 minutes, until tops are golden. Cool five minutes in pans before removing to cool further on racks.