large eggs, separated • buttermilk (or regular milk with 1 tbsp vinegar added to sour) • whole grain spelt flour • baking powder • baking soda • granulated sugar(optional, for browning/sweetness) • unsalted butter, melted and cooled slightly • pure vanilla extract • salt • Heaping Pinch cinnamon spice (optional) • Cooking spray or extra melted butter for greasing the waffle iron