In a separate bowl, whisk together the egg yolks, orange zest, buttermilk, molasses, melted butter and vanilla extract.
Stir the dry ingredients into the wet ingredients just until combined. No need to overmix the batter here.
In another bowl, whip egg whites until stiff. Add to the batter and gently fold until the egg whites are incorporated.
Spray the waffle iron with cooking spray and cook according to the unit's directions. Serve with cardamom butter and warm maple syrup.
cranberry-spice christmas mimosa