Onion Rings Recipe

Slice and separate

Peel the onions and slice them crosswise into 1/4- to 1/2-inch thick rings. Separate the rings gently into individual circles. If some smaller rings remain attached, set them aside to use with larger rings or discard per preference.

Pat the rings dry with paper towels to remove excess moisture; this helps the batter adhere and reduces oil splatter during frying.

In a shallow bowl or plate, whisk together 1/2 cup all-purpose flour, 1/2 tsp salt, and 1/4 tsp black pepper. Dredge each onion ring lightly in this flour mixture, shaking off excess. This first coating helps the batter stick to the onion.

Make the batter

In a medium bowl, whisk together 1 cup all-purpose flour, 1/4 cup cornstarch, 1 tsp baking powder, 1 tsp salt, 1/2 tsp black pepper, and 1/2 tsp paprika. In a separate small bowl, beat 1 egg with 3/4 cup milk. Pour the wet into the dry and whisk until mostly smooth. Stir in 1/2 cup very cold club soda (or cold water) a little at a time until the batter reaches a thick but pourable consistency—roughly like pancake batter. Do not overmix; a few small lumps are fine. If you plan to use panko, place 1 cup panko in a shallow dish for coating after battering.

Keep the batter chilled until frying. Cold batter and hot oil create a crispier coating.

Heat oil

Pour vegetable oil into a deep heavy pot or Dutch oven to a depth of about 2–3 inches (roughly 1 L in volume for the pot). Heat the oil over medium-high heat until it reaches 350°F (175°C). If you don't have a thermometer, test by dropping a small spoonful of batter into the oil — it should sizzle and float up steadily without burning.

Coat and fry rings

Working in small batches (4–6 rings at a time, depending on pot size), dredge each floured ring through the batter, letting excess batter drip off briefly, then optionally press into the panko to coat both sides for extra crunch. Carefully lower the coated rings into the hot oil using a slotted spoon or tongs. Fry, turning as needed, until golden brown and crisp, about 2–3 minutes per side (total 3–5 minutes per batch depending on ring thickness). Do not overcrowd the pot; maintain oil temperature between 330–360°F (165–180°C).

Use a slotted spoon to transfer fried rings to a wire rack set over a baking sheet or paper towels. Lightly season with a pinch of salt while still hot. Let oil return to proper temperature before frying the next batch.

Once all batches are fried, serve onion rings hot with ketchup or your favorite dipping sauce. If you made extra, keep them warm in a single layer on a baking sheet in a 200°F (95°C) oven for up to 15–20 minutes; avoid stacking to preserve crispness.