Air Fryer Crispy Tempura Onion and Ginger Black Rice
Nutty black rice topped with shatteringly crisp tempura-fried onions and ginger, finished with a light soy-ginger drizzle. The air fryer makes this restaurant-quality side dish accessible—no deep-frying required—while the battered alliums stay crunchy even as they sit atop the warm grains.
Steps
Before you start
- Read the recipe—tempura is made while rice cooks, then air-fried while you finish prep
- Measure black rice and water before starting; have all tempura ingredients ready to mix
- Pat onions and ginger very dry with paper towels after slicing to help batter adhere and prevent sputtering
Cook black rice
- In a medium saucepan, combine black rice, water, and salt.
- Bring to a boil over high heat, then reduce to low, cover with a lid, and simmer for 35 minutes without peeking.
- The rice will absorb all the liquid and turn tender with a slightly chewy texture.
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Ready when: All water absorbed, grains tender and glossy
Tip: Don't lift the lid during cooking—this escapes steam and extends the cooking time
Make tempura batter
- In a small mixing bowl, whisk together flour, cornstarch, baking powder, salt, and white pepper.
- Make a well in the center and pour in ice water.
- Stir gently with chopsticks or a fork until just combined—the batter should be lumpy and thick, like pancake batter.
- Do not overmix; lumps help create a crispy texture.
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Ready when: Batter is thick, lumpy, and pale yellow
Tip: Keep the batter cold; if it warms, add a few ice cubes. Warm batter fries greasier and less crispy
Prep onion and ginger
- Slice the onion into ¼-inch rings and separate into individual rings.
- Pat them dry with paper towels.
- Peel the ginger and cut into thin matchsticks about 1½ inches long, then pat dry as well.
- The drier they are, the better the batter adheres and the less likely they are to spatter in the air fryer.
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Ready when: Onion rings and ginger sticks are separated and dried
Tip: Don't skip drying—moisture prevents batter from sticking and causes sputtering
Coat tempura
- Working in batches, toss the onion rings and ginger sticks in the ice-cold tempura batter until evenly coated.
- Use your fingers or a fork to coat each piece and let excess batter drip back into the bowl.
- Do not coat all pieces at once; coat only what you can fit in the air fryer basket in a single layer.
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Ready when: All onion rings and ginger sticks are evenly coated in batter
Tip: Coat in batches just before air-frying so batter doesn't sit and absorb moisture from the vegetables
Air-fry tempura (first batch)Oven 375°F / 190°C
- Preheat air fryer to 375°F (190°C).
- Lightly spray the air fryer basket with cooking spray.
- Arrange the first batch of coated onion rings and ginger in a single layer (do not overlap).
- Air-fry at 375°F for 10 minutes, shaking the basket halfway through.
- The tempura should be golden-brown and crispy.
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Ready when: Batter is deep golden-brown and shatteringly crisp
Tip: Shake the basket halfway through to ensure even browning; crowding the basket steams the tempura instead of crisping it
Air-fry remaining tempuraOven 375°F / 190°C
- Transfer the first batch to a paper towel-lined plate.
- Coat and air-fry the remaining onion and ginger in the same way at 375°F for 10 minutes.
- If you have a third batch, repeat.
- Keep all cooked tempura on the paper towels and at room temperature until serving (they stay crispest this way).
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Ready when: All tempura is golden-brown and crispy
Tip: Paper towels absorb excess moisture that would otherwise soften the tempura
Make ginger drizzle
- In a small saucepan over low heat, combine soy sauce, mirin, minced ginger, and rice vinegar.
- Warm gently for 2 minutes until fragrant, stirring occasionally.
- Do not boil.
- Remove from heat and set aside.
- The drizzle should be thin and glossy.
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Ready when: Liquid is warm, fragrant, and slightly thickened
Tip: Keep the heat low to preserve the fresh ginger flavor; high heat makes it bitter
Assemble and serve
- Fluff the cooked black rice with a fork and divide among serving bowls.
- Drizzle each portion with the warm ginger sauce.
- Top generously with the crispy tempura onions and ginger.
- Garnish with sliced scallions and sesame seeds if desired.
- Serve immediately so the tempura stays crispy.
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Ready when: Bowls are assembled and tempura is still visibly crispy
Tip: Add the tempura just before serving—storing it on the rice will make it soggy within minutes
Good to know
Tips
- To maximize crispness, assemble the dish just before serving. Tempura stays shatteringly crisp for only 5–10 minutes atop warm rice, so don't plate early.
- If your air fryer runs hot, lower the temperature to 360°F (182°C) and add 2 minutes to the cooking time. Every air fryer is different—watch the first batch carefully.
- For a more substantial dish, add a fried egg on top or serve alongside grilled fish, tofu, or shrimp. The crispy tempura and warm rice are a perfect base.
- Leftover tempura batter can be used to coat and air-fry other vegetables like carrots, bell peppers, or broccoli florets at the same temperature and time.
Make ahead
Black rice can be cooked up to 2 days ahead and refrigerated in an airtight container. Reheat gently in a saucepan with a splash of water over low heat, or in a microwave. The tempura batter can be made up to 2 hours ahead and refrigerated, but the vegetables should be prepped and coated just before air-frying for best crispness. The ginger drizzle can be made up to 4 hours ahead and reheated gently just before serving.
Storage & reheating
Store leftover cooked black rice in an airtight container in the fridge for up to 3 days, or freeze for up to 2 months. Tempura does not store well—it will soften within 1–2 hours even in an airtight container due to residual moisture. Make tempura fresh for serving. Reheat rice in a saucepan with a splash of water over low heat or in a microwave until warmed through, 2–3 minutes.
Substitutions
- black rice (also called forbidden rice) → jasmine rice or sushi rice. Use the same volume and water ratio. Jasmine rice cooks in 15–18 minutes and has a lighter, more delicate flavor. The dish will be less visually striking but equally delicious.
- fresh ginger → thin matchsticks of daikon radish or carrots. These vegetables will air-fry crispier and with less water content. Reduce air-frying time to 8 minutes and watch carefully, as they brown faster than ginger.
- ice water → ice water with 1 teaspoon rice vinegar or white wine. This adds subtle tang to the batter and enhances crispness. Keep the water as cold as possible.
- mirin (sweet rice wine) → honey or agave nectar. Use the same volume. Honey adds sweetness and body; agave is slightly lighter. Both work well in the ginger drizzle.
