Yaki onigiri recipe: Japanese rice balls from the BBQ
Yaki onigiri are Japanese rice balls that develop a golden-brown, crispy crust on the grill. Inside, they remain soft and sticky. A thin layer of soy sauce, tare, or miso glaze adds umami and caramelization without turning the rice into a heavy dish.
As a side dish, yaki onigiri pair well with yakitori, grilled fish, chicken, and vegetables. The technique mainly requires patience: form compact rice balls, let a dry crust form first, and only brush them with sauce afterwards.
What are yaki onigiri?
Onigiri are shaped portions of Japanese rice, often triangular or round. Yaki means grilled. With yaki onigiri, the rice surface is toasted until a firm crust forms.
Not every onigiri is grilled, and not every yaki onigiri has a filling. A simple version without filling is the most reliable for the barbecue. The rice remains compact and sauce can be applied evenly.
Read more about the grilling traditions that suit this side dish on the page about Japanese BBQ, yakitori, and yakiniku.
Which rice should you use?
Use Japanese short-grain rice or rice explicitly intended for sushi and onigiri. After cooking, the grains stick together enough to form a firm shape.
Do not use long-grain rice or dry basmati; it falls apart more easily. Furthermore, do not season the rice with sushi vinegar. Yaki onigiri are usually made with unseasoned cooked rice.
Follow the instructions on the packaging for the amount of water and cooking time. Different types of rice and cooking methods require different ratios.
Ingredients for 8 small yaki onigiri
- 300 grams Japanese short-grain rice
- Water according to the packaging
- A small amount of salt for your hands
- 1 tablespoon neutral oil for the grate
For the soy glaze
- 2 tablespoons Japanese soy sauce
- 1 tablespoon mirin
- 1 teaspoon sugar
For a gluten-free diet, check that the soy sauce and mirin used are officially gluten-free.
Cooking the rice
- Rinse the rice with cold water until the water becomes significantly less cloudy.
- Drain the rice.
- Cook according to the instructions on the packaging or in a rice cooker.
- Let the rice rest covered for 10 minutes after cooking.
- Fluff gently without crushing the grains.
Shape the onigiri while the rice is still warm enough to stick well, but not so hot that you burn your hands.
Shaping onigiri
- Prepare a bowl of cold water with a little bit of salt.
- Lightly dampen your hands.
- Take about 80 to 100 grams of warm rice.
- Press together firmly but not extremely hard.
- Shape into a flat triangle or round disc about 2 centimeters thick.
- Check that the edges are closed and compact.
- Place on parchment paper and repeat with the rest.
- Let the shaped rice balls cool and dry out slightly for 15 to 20 minutes.
Do not make the onigiri too thick. A flatter shape gets more toasted surface area and is easier to flip.
Making the soy glaze
Mix soy sauce, mirin, and sugar in a small pan. Heat briefly until the sugar has dissolved and then let it cool.
Only use the glaze after the rice has formed a crust. Otherwise, soy sauce and sugar make the surface wet and sticky, which can cause the onigiri to stick to the grate.
Grilling yaki onigiri on the BBQ
- Prepare the barbecue for medium-high direct heat and a small indirect zone.
- Clean the grate thoroughly and grease it very lightly.
- Place the onigiri on the grate without sauce.
- Grill for 4 to 6 minutes without moving them.
- Lift carefully with a thin, wide spatula.
- Only flip when the bottom is firm and golden brown.
- Grill the second side for 4 to 6 minutes as well.
- Brush both sides thinly with the soy glaze.
- Grill for another 30 to 60 seconds per side.
- Move to indirect heat if the glaze darkens too quickly.
- Serve warm.
The exact time depends on the grate, temperature, and moisture in the rice. Do not force the rice balls loose; give the crust more time if they are still sticking.
Yaki onigiri with miso
For a miso version, mix 1 tablespoon of miso with 1 tablespoon of mirin and 1 to 2 teaspoons of water. Brush the roasted onigiri with a very thin layer only at the end.
Miso can darken quickly. Use indirect heat and stay by the barbecue. More explanation about types and application can be found on the page about miso as BBQ glaze.
Yaki onigiri in a cast-iron pan
Heat a lightly greased cast-iron pan over medium-high heat. Fry the rice balls without sauce until both sides have a firm crust.
Then, apply a thin layer of glaze and fry each side briefly once more. This method is practical when the grill grate is wide or when the rice balls still feel fragile.
Can you fill yaki onigiri?
You can, but a filling makes the structure more fragile. Start without filling when using the technique for the first time.
If you still want to fill them, choose a small amount of dry filling and enclose the rice completely around it. Wet sauces or large pieces make the onigiri open up more easily during grilling.
What do you serve yaki onigiri with?
Yakitori
The rice provides a calm, crispy base alongside glazed chicken skewers.
Grilled fish
Soy and miso pair well with salmon, mackerel, and other firm fish species.
Yakiniku
Serve small yaki onigiri with thinly grilled meat and fresh vegetables.
Grilled vegetables
Mushrooms, eggplant, bell peppers, and scallions pair well with the toasted rice and umami-rich glaze.
Preparing and storing rice safely
Cooked rice requires careful temperature control. Preferably make the onigiri shortly before grilling and do not keep warm rice lukewarm for long periods.
If you want to work ahead, chill the shaped rice balls quickly, store them covered in the refrigerator, and use them within a short, safe timeframe. Follow current food safety advice for cooked rice.
Do not leave chilled onigiri at room temperature for hours. Heat them through completely while grilling and discard leftovers if you are in doubt about time or temperature.
Common mistakes
- Using long-grain rice: choose sticky Japanese short-grain rice.
- Shaping the rice too loosely: press firmly enough so that the edges are closed.
- Flipping too early: wait until a firm crust forms.
- Applying the glaze immediately: grill dry first, glaze only at the end.
- Using too much sauce: a thin layer provides flavor without making the crust soft.
- Keeping rice lukewarm for long periods: chill quickly or serve immediately.
Crispy rice from the Japanese grill
Yaki onigiri turns simple rice into a full-fledged BBQ side dish. The crust provides smoke and crunch, while soy or miso adds just enough umami.
Serve the rice balls warm and discover more additions in the overview of BBQ side dishes, salads, and planning.