Onion Rings with Diner-Style Batter
Crisp, golden onion rings with a light, craggy diner-style batter that clings well and stays crunchy. A simple flour–cornstarch base and cold, bubbly liquid create that classic shatter when you bite in.
Diner onion rings are all about contrast: sweet onion inside, airy crunch outside. The key is a well-seasoned batter that’s mixed gently and kept cold so it fries up light instead of bready. Using a touch of cornstarch boosts crispness, and a quick rest helps the coating adhere for fewer bare spots.
Total Time
35 min
Prep Time
15 min
Cook Time
20 min
Servings
4
Ingredients
Onions
- •2 large yellow onions, sliced into 1/2-inch rings, separated
Diner-Style Batter
- •1 cup (125 g) all-purpose flour, plus more for dredging
- •1/4 cup (35 g) cornstarch
- •1 1/2 tsp baking powder
- •1 tsp kosher salt
- •1/2 tsp paprika
- •1/4 tsp garlic powder
- •1/4 tsp black pepper
- •1 large egg, lightly beaten
- •1 cup (240 ml) cold club soda (or cold seltzer), plus 2–4 tbsp as needed
For Frying & Serving
- •Neutral frying oil (peanut, canola, or vegetable), enough for 2 inches in a heavy pot
- •Optional: seasoned salt or fine salt, for finishing
- •Optional: ketchup, diner-style fry sauce, or ranch, for serving
Instructions
- 1
Slice onions into 1/2-inch rings and separate them. Pat very dry with paper towels (less surface moisture = better adhesion and less splatter).
- 2
Set up for frying: place a wire rack over a sheet pan. In a heavy pot or Dutch oven, heat 2 inches of oil to 365°F (185°C).
- 3
Make the batter: in a large bowl whisk together flour, cornstarch, baking powder, salt, paprika, garlic powder, and pepper. Whisk in the egg, then whisk in the cold club soda just until combined. The batter should be the consistency of heavy cream; add a little more club soda if it feels thick. Let stand 5 minutes.
- 4
Dredge: put a handful of flour in a shallow dish. Working in batches, toss onion rings in flour, shaking off excess. This dry coat helps the batter cling.
- 5
Batter and fry: dip floured rings into the batter, let excess drip back into the bowl, then carefully lower into the hot oil. Fry in small batches (don’t crowd) for 2–3 minutes, turning once, until deep golden and crisp.
- 6
Drain and season: transfer to the wire rack (not paper towels, which can steam and soften). Lightly season with salt or seasoned salt while hot.
- 7
Repeat with remaining rings, returning oil to 365°F between batches. Serve immediately with ketchup or your favorite diner dip.
Nutrition Facts
Per serving
* Percent Daily Values are based on a 2,000 calorie diet.
Nutrition calculated automatically from ingredients.