1. In a bowl, combine dry ingredients.
2. In another bowl, combine milk, buttermilk, melted butter, and egg yolks.
3. Add this mixture to dry ingredients. Mix until smooth without overmixing.
4. In another bowl, whisk egg whites until peaks form.
5. Using a spatula, gently fold egg whites into mixture without knocking out too much air.
6. Spray the inside of a hot waffle maker with baking spray (PAM).
7. Pour half to three quarters of a cup of mixture into the waffle maker and spread lightly. Cook for 3–4 minutes or until golden.
8. Serve warm with your choice of toppings.

Chef’s secret

If the batter is too thick, dilute it with a little milk. The batter keeps in the refrigerator for 3 to 5 days.