Tempura Onion Rings
Crispy, golden tempura onion rings served with a tangy dipping sauce and a fresh side salad. A fun and easy weeknight treat.
- Total time
- 35 min
- Servings
- 4
- Calories
- 450
- Protein
- 5g

Ingredients
- 2 large onion
- 1 cup all-purpose flour
- ½ cup cornstarch
- 1 teaspoon baking powder
- 1.5 cups ice-cold water
- 3 cups vegetable oil
- ½ cup mayonnaise
- 2 tablespoons lemon juice
Instructions
- 1
Slice the 2 large onions into 1/2-inch thick rings and separate them. Pat dry with paper towels.
- 2
In a bowl, whisk together 1 cup flour, 1/2 cup cornstarch, 1 teaspoon baking powder, and 1/2 teaspoon salt. Add 1.5 cups ice-cold water and stir until just combined; the batter should be lumpy.
- 3
Heat 3 cups vegetable oil in a deep pot to 375°F (190°C). Meanwhile, make the dipping sauce by mixing 1/2 cup mayonnaise, 2 tablespoons lemon juice, and a pinch of salt.
- 4
Dip each onion ring into the batter, letting excess drip off. Carefully place a few rings into the hot oil without crowding; fry until golden and crispy, about 2-3 minutes per batch.
- 5
Remove rings with tongs and drain on paper towels. Repeat with remaining rings. Serve hot with the dipping sauce and a side salad of lettuce, red bell pepper, and olives if desired.
- 6
For extra flavor, add a pinch of paprika or garlic powder to the batter if you have them.
Tools you’ll need
- Deep pot or Dutch oven
- Candy thermometer
- Mixing bowls
- Whisk
- Tongs
- Paper towels
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