INGREDIENTS
2 cups
cake flour
1 1/2 tsp
baking powder
3/4 tsp
baking soda
3/4 tsp
salt
3/4 cup
sour cream
2
large eggs, separated
3/4 cup
milk
1 tsp
vanilla extract
1 stick
unsalted butter, melted, plus more for the waffle iron
1/4 cup
vegetable shortening, melted
2 tbsp
packed dark brown sugar
Maple syrup, for topping