In a serperate bowl, whisk together all other ingredients until smooth.
Fold in egg whites into mixture.
Heat a medium-sized skillet or crepe pan over medium heat. Grease pan with a small amount of butter or oil applied with a brush or paper towel. Using a serving spoon or small ladle, spoon about 3 tablespoons crepe batter into hot pan, tilting the pan so that bottom surface is evenly coated. Cook over medium heat, 1 to 2 minutes on a side, or until golden brown. Serve immediately.