INGREDIENTS
1 2/3 cups
all-purpose flour
1 cup
sugar
1/4 tsp
baking soda
1 tsp
baking powder
3/4 cup
salted butter (170g)
3
egg whites
3 tsp
vanilla extract
1/2 cup
sour cream
1/2 cup
milk
3 cups
confectioner’s sugar
1 cup
softened butter
2 tbsp
cream
1 tsp
vanilla extract
1 pinch
salt