Mix together the butter, granulated sugar, and brown sugar until light and creamy, about 2-3 minutes. 1/2 cup unsalted butter, 3/4 cup granulated sugar, 1/2 cup brown sugar
Add in your eggs, one at a time, stirring until combined, then stir in the vanilla extract. 2 eggs, 1 tsp vanilla
Stir in the pumpkin. 1 cup pumpkin puree
In a separate bowl combine the dry ingredients; flour, baking soda, baking powder, salt, cinnamon, and nutmeg. 2 cups all purpose flour, 1 tsp cinnamon, 1 tsp baking soda, 1/2 tsp baking powder, 1/2 tsp salt, 1/2 tsp nutmeg,
Mix the dry ingredients with the wet ingredients, until combined.
Preheat the oven to 425 degrees Fahrenheit. Line two muffin pans with muffin liners in every other spot. While the oven is preheating, let the muffin batter sit aside for 15 minutes.
Scoop muffin batter into each muffin spot, dividing it evenly between the 12 muffin spots, filling them almost to the top.