INGREDIENTS
1 2/3 cups
all-purpose flour (213g)
1 cup
granulated sugar (190g)
1/4 tsp
baking soda
1/4 tsp
kosher salt
1 tsp
baking powder
3/4 cup
unsalted butter (190g, almost melted,)
3
egg whites (room temperature)
3 tsp
vanilla extract
1/2 cup
sour cream (120ml, room temperature)
1/2 cup
whole milk (120ml, warm)
1
lbs confectioners sugar (463g)
2 sticks
unsalted butter (228g, room temperature)
1 tsp
vanilla extract
1 tbsp
whole milk