Instructions: In large bowl, combine egg yolks, yogurt, milk, sugar and butter; stir until smooth.

In another bowl, combine flour, baking powder, baking soda and cinnamon. Stir dry ingredients into yolk mixture just until moistened (do not over mix).

Beat egg whites until stiff, but not dry. Fold into batter. Carefully pour batter into prepared waffle iron, spreading near edges of iron with back of metal spoon. (This batter is slightly thicker than the usual waffle batter.)

Close waffle iron lid and cook according to waffle iron directions.

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