INGREDIENTS
1/4 cup
Blueberries, fresh
1
Egg, large
1 1/8 cups
All-purpose flour
1 tsp
Baking powder
1/2 cup
Brown sugar, light packed
2 tbsp
Cinnamon, ground
1 cup
Confectioners' sugar
3/4 tsp
Kosher salt
1 cup
Sugar
5 1/2 tbsp
Butter, unsalted
1/2 cup
Sour cream
1 tbsp
Whole milk