Ingredients

• 3 large Bermuda onions, sliced into 1/3-inch rings
• 1 cup sifted all-purpose flour
• 1 cup buttermilk
• 1 egg, beaten
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 2 cups corn oil, or as needed

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Instructions

1. Soak onion rings in a bowl of ice water for 1 hour; drain and pat dry with paper towels.
2. Whisk flour, buttermilk, egg, baking soda, and salt together in a bowl until smooth.
3. Heat oil in a deep-fryer or large saucepan to 375 degrees F (190 degrees C).
4. Dip onion rings in batter, working in batches; fry battered onion rings in the hot oil until browned, about 5 minutes. Remove with a slotted spoon and drain on a paper towel-lined plate.