Step 1

Combine first 5 ingredients in a bowl. Make a well in the center of the mixture.

Step 2

Stir together egg and buttermilk; add mixture to dry ingredients. Stir until moistened. Stir in onion.

Step 3

Pour oil into 10-inch cast iron skillet, and heat to 375°. Drop batter by tablespoonfuls into oil, and fry in batches 3 minutes on each side or until golden. Drain on paper towels. Serve immediately.