INGREDIENTS
3
Egg whites
1 2/3 cups
All purpose flour
1 tsp
Baking powder
1/4 tsp
Baking soda
4 cups
Powdered sugar
1/2 cup
Shortening
1 cup
Sugar
4 tsp
Vanilla
3
salted butter (170g), salted
1/2 cup
Butter, salted
1/2 cup
Milk
1/2 cup
Sour cream
2 tbsp
Water or cream