In a large bowl, combine the cornmeal, flour, baking powder and salt. Whisk the egg, milk and onion; add to dry ingredients just until combined.
In a deep-fat fryer or electric skillet, heat oil to 365°. Drop batter by teaspoonfuls into oil. Fry 2 to 2-1/2 minutes or until golden brown. Drain on paper towels. Serve warm. Yield: 4-6 servings.