INGREDIENTS
2
Egg whites (about 2 1/2 ounces; 70g), large
1
Maple syrup
3/8 cup
powdered sugar
1 1/3 cups
all-purpose flour
1/2 tsp
Baking powder
1/2 tsp
Baking soda
1/2 tsp
Diamond crystal kosher salt
1
Vanilla bean
1 tsp
Vanilla extract
1 3/4 cups
cultured lowfat buttermilk
1 1/2 oz
Butter, unsalted