Ingredients

2 cups all-purpose flour 

1/4 cup packed light-brown sugar 

1 teaspoon baking soda 

1 1/2 teaspoons baking powder 

1/2 teaspoon ground cinnamon 

1/2 teaspoon salt 

3 large eggs, separated, room temperature 

2 cups buttermilk, room temperature 

8 tablespoons (1 stick) melted unsalted butter, plus more for waffle iron 

1 vanilla bean, split and scraped 

Preparation

Grease waffle iron with a small amount of melted butter, and heat. In a large bowl, sift together the flour, sugar, baking soda, baking powder, cinnamon, and salt.

In a separate bowl, whisk together egg yolks, buttermilk, melted butter, and vanilla-bean scrapings. Pour into dry mixture, and combine.

In a medium bowl, beat egg whites until stiff but not dry. Fold whites into batter.

Ladle about 1/3 cup batter onto each section of the waffle grid; spread batter almost to the edges. Close lid, and bake 3 to 5 minutes, until no steam emerges from waffle iron.

Transfer cooked waffles to a baking sheet; place in an oven set to low heat, about 200 degrees, while using remaining batter.