Preheat oven to 375 degrees; cook pumpkin in a small baking dish for 15 minutes; allow to cool before making pancakes.
In a large bowl, combine flour, sugar, baking soda, salt, baking powder, and cinnamon.
In another bowl, mix milk, pumpkin, egg, and oil; stir into dry ingredients, until just moistened.
Coat a nonstick pan with cooking spray and heat over medium heat.
Pour batter into pan using a 1/4 cup measuring cup.
When bubbles form on top of pancake, flip and cook on the other side.
Cook until golden brown and serve.