INGREDIENTS
6 tsp
Lemon, zest
2 tsp
Lime, zest
5
Egg whites, large
3
Egg yolks, large
3
Eggs, large
2/3 cup
Lemon juice
2/3 cup
Lime juice
2 1/2 tsp
Baking powder
1/4 tsp
Baking soda
1/4 cup
Cornstarch
1/4 tsp
Cream of tartar
3 cups
Flour
1/2 tsp
Salt
4 1/4 cups
Sugar
1 1/4 tsp
Vanilla extract
1
Cardboard cake circle (9 inches)
14 tbsp
Butter
1/3 cup
Sour cream
1 3/4 cups
Water