In medium bowl combine and mix the dry ingredients, then add onions and toss to coat. Remove onion rings, shaking off excess flour mixture.

In a deep skillet, heat about two cups of oil over medium-high heat until hot. Test the temperature by dropping a pinch of flour into the hot oil. If it bubbles right away without smoking, it's ready.

Fry a few rings at a time for until crisp and golden brown. Drain on paper towels.

Season the onions with salt if needed