INGREDIENTS
5
Egg whites, large
3 cups
All-purpose flour
1 tbsp
Baking powder
1 1/2 cups
Brown sugar, dark
6 cups
Powdered sugar
1/4 tsp
Salt
2 cups
Sugar
1 1/2 tbsp
Vanilla extract
2 1/2 cups
Butter, unsalted
1/2 cup
Heavy cream
1 cup
Milk
3/4 cup
Sour cream