In a large bowl, whisk together all the dry ingredients. Set aside.
In a mixing bowl (or stand mixer), beat the egg whites until stiff peaks form.
Meanwhile, in a separate bowl combine the remaining items (egg yolks, melted butter, vanilla and buttermilk) and whisk until well combined.
Add the wet ingredients to the dry ingredients and stir only a few times (do not mix everything together at this point).
Next, gently fold the egg whites into the mixture and combine until mostly incorporated (do not overmix...if the ingredients are only 97% mixed together, as opposed to 100%, it’s definitely ok).
Scoop batter onto a greased and heated waffle maker and cook until golden brown. Tip: to keep waffles warm and crispy while you cook the remaining waffles, simply place them on a baking sheet, in a single layer, in an oven set to 225 degrees.
Serve the waffles with apples, a little cream or mascarpone if you’d like (I chose mascarpone here), and plenty of that bourbon syrup. I also hear it pairs well with bacon, coffee and crisp fall mornings!