Onion Rings Recipe

slice onions

Peel the onions and slice into 1/4- to 1/2-inch thick rings. Separate rings gently with your fingers, discarding the small center pieces (or reserve for another use). Pat the rings dry with paper towels to remove excess moisture.

Place the rings in a single layer on a baking sheet or plate and chill in the refrigerator for 10 minutes — this firms them slightly and helps the batter adhere.

mix dry ingredients

In a medium bowl, whisk together the all-purpose flour, cornstarch, baking powder, salt, sugar, and black pepper until evenly combined.

combine wet and dry

In a separate small bowl, lightly beat the egg, then whisk it into the cold sparkling water (or cold beer). Pour the wet mixture into the dry ingredients and whisk until just combined. The batter should be slightly thick but still runny enough to coat rings; if too thick, add a tablespoon of cold water at a time until you reach the desired consistency. Keep the batter chilled (place bowl over another bowl with ice briefly if your kitchen is warm).

prepare coating

Combine panko breadcrumbs and optional cornmeal in a shallow bowl. If you prefer a lighter batter-only onion ring, omit the panko and use extra flour for dusting instead.

Lightly dust the chilled onion rings with a tablespoon of flour (optional) to help the batter stick better.

heat oil

Pour oil into a deep heavy pot or Dutch oven to a depth of about 2-3 inches (or fill a deep fryer per manufacturer instructions). Heat the oil to 350°F (175°C). If you don't have a thermometer, test by dropping a small bit of batter into the oil — it should sizzle and rise to the surface within a few seconds without browning immediately.

coat and fry

Working in small batches (3–5 rings depending on pot size), dip each onion ring into the batter, allowing excess to drip back into the bowl, then press gently into the panko (if using) to coat both sides. Carefully lower the ring into the hot oil with tongs or a slotted spoon. Fry until golden brown and crisp, about 2–3 minutes per side, turning if needed so color is even. Avoid overcrowding the pot; overcrowding drops the oil temperature and yields soggy rings.

drain

Use a slotted spoon or spider to transfer fried rings to a wire rack set over a baking sheet or a plate lined with paper towels. Immediately season lightly with a pinch of kosher or sea salt while still hot.

Between batches, monitor oil temperature and adjust heat to maintain about 350°F (175°C). If oil darkens or smokes, discard and start with fresh oil for best flavor.

When all batches are fried, give the onion rings a final sprinkle of salt and a grind of black pepper. Serve hot with your chosen dipping sauces on the side.

If holding briefly, keep the rings in a warm (200°F / 95°C) oven on a wire rack so they stay crisp for up to 20–30 minutes. Avoid stacking them, which traps steam and makes them soggy.