Whisk the all-purpose flour, baking powder, and kosher salt together in a large mixing bowl. (If making the Buttermilk Remix, add the baking soda here).

In a separate bowl, whisk the egg yolks with the milk, melted butter, and vanilla extract. (If making a remix, omit the vanilla and swap the whole milk for buttermilk here).

In a meticulously clean glass or metal bowl, beat the egg whites until stiff peaks form.

Pour the liquid yolk mixture into the dry flour mixture and stir until just combined.

If making the Savory Remix, fold the shredded sharp cheddar, minced chives, and black pepper into the batter now.

Gently fold the stiff egg whites into the batter. Do not overmix; lumps are your friend and ensure a tender crumb.

Ladle the airy batter into a preheated, lightly oiled waffle iron.

Cook until the iron completely stops steaming to guarantee the ultimate crispy exterior, about 4 to 5 minutes.

Serve immediately with warm amber maple syrup, or hot butter and honey for the savory variation.