INGREDIENTS
2
Eggs plus 1 egg yolk, large
3 tsp
Baking powder
1/4 cup
Brown sugar, light packed
2 1/2 tsp
Cinnamon, ground
1 cup
Confectioners' sugar
3 1/2 cups
Flour
1 1/2 cups
Granulated sugar
3/4 tsp
Salt
2 1/2 tsp
Vanilla
3/4 cup
Butter, unsalted
5/8 cup
Buttermilk
1/2 cup
Sour cream, full-fat