rich buttermilk waffles

INGREDIENTS

• 2 cups all-purpose flour
• 1/2 teaspoon salt
• 2 tablespoons sugar
• 1 1/2 teaspoons baking soda
• 1 3/4 cups buttermilk* or 1 1/2 cups sour cream or plain yogurt thinned with 1/4 cup milk
• 2 eggs, separated
• 4 tablespoons (1/2 stick butter, melted and cooled)
• 1/2 teaspoon vanilla extract
• Canola or other neutral oil for brushing on waffle pan (Deb note: Pam works great!)