Heat waffle iron. In a large bowl, sift together the flour, ginger, cinnamon, cloves, salt, baking soda, baking powder, and sugar.
In a medium bowl, whisk together egg yolks, molasses, buttermilk, and butter. Pour into dry ingredients; stir until just combined.
In a medium bowl, beat egg white until stiff but not dry. Fold into the batter.
Ladle about 1/3 cup batter onto each section of waffle grid; spread batter almost to edges. Close lid; bake about 5 minutes, until no steam emerges from the waffle iron.
Transfer cooked waffles to a baking sheet; place in an oven set to low heat, about 200 degrees, while using remaining batter. Serve.