Preheat oven to 350F. Grease mini muffin pan with pam spray.
In a large bowl, whisk together sugar and egg until combined.
Add in flour, baking powder, salt, cinnamon and nutmeg.
Mix until combined.
Then mix in pumpkin puree, vegetable oil, milk and vanilla extract.
Spoon in batter to muffin pan about 2/3 full.
Bake for 10-12 minutes until toothpick inserted comes out clean.
Let muffins cool before coating with cinnamon sugar.
For the coating. Melt 1/4 cup butter in a small glass bowl. In another small bowl, combine 2/3 cup white sugar and 2 tsp cinnamon. Dip top of donuts in melted butter and then dip in the sugar mixture.