Good-Cooking - Cornmeal Biscuits

Ingredients

• 1 1/2 cups flour
• 1/4 cup yellow cornmeal, plus 2 tablespoons
• 2 teaspoons baking powder
• 3/4 teaspoons baking soda
• 3/4 teaspoon salt
• 1 1/2 tablespoons granulated sugar
• 6 tablespoons chilled butter or margarine
• 3/4 cup buttermilk, plus 1 tablespoon