• Heat oven to 325 degrees F. Spray mini donut pan with nonstick baking spray. In a medium-sized mixing bowl, add flour, baking powder, salt and pumpkin pie spice and mix together with a whisk. Add butter and using a fork or pastry cutter, cut butter into the flour mixture until there are pea sizes of butter mixed in with the flour. Add sugar and mix with a rubber spatula. Add buttermilk, egg and vanilla extract and carefully blend with rubber spatula. Batter may be lumpy.
• Spoon about 1 Tablespoon of batter into each opening and spread using a spoon or your fingers. Bake for 10 to 12 minutes. Cover a baking rack with parchment paper and flip donut pans onto the baking racks.

Brown Butter Vanilla Glaze

• While the donuts are baking, make the glaze. Mix glaze ingredients in a medium sized mixing bowl with a fork or rubber spatula until smooth. Dip donuts in glaze while they are still warm and serve immediately.