– 1/2 cup butter
– 2 cups whole milk
– 4 eggs — yolks separated from whites
– Pinch of cream of tartar
– 1 1/4 cup confectioner’s sugar
– 1 tsp vanilla extract
– 1 tsp ground cinnamon
– 1/2 tsp pumpkin pie spice
– 1 cup pumpkin puree — not pumpkin pie filling
– 1 cup all-purpose flour