INGREDIENTS
1 cup
Fruit - optional, fresh
2 tbsp
Lemon, zest
1
Egg + 2 egg whites
4 tbsp
Lemon juice
3/4 cup
All-purpose flour
1 tsp
Baking powder
1/4 tsp
Baking soda
3/4 cup
Cake flour
1 cup
Granulated sugar
3/4 tsp
Kosher sea salt
3 cups
Powdered sugar
2 1/2 tsp
Vanilla
1 cup
Butter, unsalted
1
block Cream cheese, original
1/2 cup
Sour cream or greek yogurt, full-fat plain