Preheat oven to 350°

Melt the 2 tablespoons of butter and set aside.

Whisk together the dry ingredients (except brown sugar) and set aside.

In a separate bowl, whisk together the wet ingredients, melted butter, and brown sugar until fully incorporated. Pour wet ingredient mixture into the dry mixture. Stir until only combined. Do not over stir! 

Fill a resealable plastic bag (or piping bag) with the batter and clip a triangle out of one bottom edge. Fill each donut cup roughly 1/2 to 2/3 full of batter. Spread batter evenly between all 12 cups.

Bake for 9 to 10 minutes, being careful not to over bake.

Remove from oven and allow to sit in pan for 5 minutes before moving to a baking rack to cool for 5 to 10 more minutes.

Melt butter in one bowl and in a separate bowl, mix together cinnamon and sugar.

Dip each side of a doughnut in butter and then in cinnamon sugar. Flip back and forth a couple times in the sugar mixture to make sure they are covered with a generous amount. Place back onto cooling rack until ready to serve. Repeat until all 12 doughnuts are coated in cinnamon sugar.