Directions

1. In the bowl of a stand mixer, cream together the butter and sugars.
2. Add in the eggs, the vanilla, and the sweet potatoes, and mix well.
3. In a small bowl, combine the flour, baking powder, salt, and pumpkin pie spice.
4. To the mixture in the stand mixer, add half of the flour mixture and a 1/2 cup of the milk, mix them in on low. Then add the other half of the flour and the other 1/2 cup of milk and stir until just combined.
5. Grease a regular-sized muffin tin and fill the cups 2/3 full with the batter. Bake in a 375-degree oven for 25 to 30 minutes.