INGREDIENTS
1
Egg, large
1 tsp
Baking powder
1/2 cup
Brown sugar, light packed
1/4 tsp
Cinnamon
1/2 cup
Confectioners' sugar
19 1/2 tbsp
Flour
1/4 cup
Granulated sugar
1/2 tsp
Salt
1/2 tsp
Vanilla extract
1/4 stick
Butter, unsalted
2 1/2 tbsp
Butter, unsalted
1/2 cup
Sour cream, full-fat
1/2 tbsp
Whole milk