Sour Cream Waffles

1 cup cake flour - sifted
1 1/3 tsp baking powder
1/4 tsp salt
1 tsp sugar
1 tsp baking soda
3 eggs, separated
1 1/2 cups sour cream

Sift flour with other dry ingredients
Beat egg yolks with sour cream
Combine flour mixture with egg yolk mixture
Beat egg whites until stiff
Fold egg whites into batter
Bake on preheated waffle iron for 3-4 minutes until steam stops escaping