3 eggs, separated
3/4 cup milk
8 Tbs. (1 stick) unsalted butter, melted
3/4 cup sour cream
Finely grated zest of 1 lime, 1 orange and 1 lemon
1 1/2 cups all-purpose flour
2 tsp. baking powder
1/2 tsp. baking soda
1/4 tsp. salt
1 Tbs. sugar
Preheat a waffle maker according to the manufacturer’s instructions.
In a large bowl, whisk the egg yolks.
Whisk in the milk, butter, sour cream and citrus zests.
Over a sheet of waxed paper, sift together the flour, baking powder, baking soda, salt and sugar. Add the flour mixture to the yolk mixture and whisk until smooth.
In another large bowl, whisk the egg whites until stiff peaks form.
Using a rubber spatula, fold 1⁄2 cup of the egg whites into the batter, then carefully fold in the remaining whites.
Cook the waffles according to the manufacturer’s instructions. Serve hot with maple syrup.