1 large vidalia onions or 1 large sweet onion
3/4 cup all-purpose flour
1/4 cup cornmeal
1/2 teaspoon baking powder
1/2 teaspoon salt
1/4 teaspoon baking soda
1/4 teaspoon cayenne pepper
1 cup buttermilk
1 Cut onion into 1/2 inch slices; separate into rings.
2 In a bowl, combine the flour, cornmeal, baking powder, salt, baking soda and cayenne.
3 Combine the egg and buttermilk; stir into dry ingredients just until moistened.
4 In an electric skillet or deep-fat fryer, heat 1 inch of oil to 375.
5 Dip onion rings into batter.
6 Fry a few at a time for 1 to 1 1/2 minutes on each side or until golden brown.
7 Drain on paper towels (keep warm in a 300 oven).