INGREDIENTS
5
Egg whites, large
4
Eggs, large
2 cups
All-purpose flour
1 1/2 tsp
Baking powder
1 tsp
Baking soda
1 cup
Cocoa powder, unsweetened
2 tbsp
Cocoa powder, dark
1/2 tsp
Cream of tartar
3 1/2 cups
Granulated sugar
1/2 tsp
Kosher salt
1 pinch
Kosher salt
4 tsp
Vanilla
1 cup
Butter, unsalted
1 cup
Greek yogurt
2/3 cup
Water