In a medium-size bowl, beat egg yolks and buttermilk until blended. In another medium-size bowl, stir together flour, cornmeal, baking powder, soda, salt, sugar, and wheat germ. Gradually add flour mixture to yolk mixture; blending until smooth. Stir in butter.
In a small bowl, beat egg whites just until stiff, moist peaks form; fold into cornmeal batter just until blended. Bake waffles in waffle iron.
Makes about 1 dozen 4-inch-square waffles.