1Heat nonstick waffle maker. In large bowl, mix all-purpose flour, whole wheat flour, oats and baking powder.
2In small bowl, mix milk, egg product and oil until well blended. Add to flour mixture all at once; stir just until large lumps disappear.
3Spread batter in hot waffle maker; bake until waffle is golden brown and steaming stops. Sprinkle with powdered sugar.