Buttermilk Vanilla Waffles Recipe

Name: Buttermilk Vanilla Waffles Recipe
Ingredients: 6 1/2 ounces all purpose flour (1 1/3 cup; 185g); 1 1/2 ounces powdered sugar (1/4 cup plus 2 tablespoons; 45g); 1/2 teaspoon (2g) Diamond Crystal kosher salt; for table salt, use half as much by volume or use the same weight; 1/2 teaspoon (3g) baking soda; 1/2 teaspoon (2g) baking powder; 1 vanilla bean, split and scraped (see note); 14 ounces cultured lowfat buttermilk (1 3/4 cup; 395g) (see note); 1 1/2 ounces unsalted butter, melted (3 tablespoons; 40g); 2 large egg whites (about 2 1/2 ounces; 70g); 1 teaspoon (5ml) vanilla extract; Maple syrup, for serving