Yaki Onigiri (Grilled Rice Cakes) with Caramelized Onion

About This Recipe

Yaki onigiri are onigiri (rice balls) taken a step further -- pressed into shape, then pan- or grill-seared until the surface turns crackling and golden, and finally brushed with a soy glaze that caramelizes into a savory crust as it hits the hot rice. This version mixes slow-cooked caramelized onion directly into the rice before shaping, giving each bite a pocket of sweetness that plays against the salty glaze. The technique depends on using freshly cooked, still-warm short-grain rice, which is sticky enough to hold its shape when pressed firmly into cakes or triangles. The rice cakes need real contact time on a hot, lightly oiled pan or grill -- pressing down occasionally -- so a genuine crust forms rather than just warming through, and the soy glaze should be brushed on in the last minute of cooking on each side so it caramelizes rather than just soaking in and going soft. Originally a way to use up leftover rice at riverside food stalls and after festivals, yaki onigiri today is a common izakaya order -- the smell of soy sauce caramelizing over a grill is one of the most recognizable aromas of a Japanese pub kitchen.

Ingredients

Serves 4

• 3 cupscooked short-grain rice(warm)
• 1 largeonion(thinly sliced)
• 1 tbspbutter
• 1 tspsalt
• 3 tbspsoy sauce
• 2 tbspmirin
• 1 tbspsugar
• 1 tbspneutral oil(for the pan)
• 1 tsptoasted sesame seeds(for garnish)

Instructions

1. 1

   Caramelize the onion

   Melt butter in a skillet over medium-low heat. Cook onion, stirring occasionally, for 18-20 minutes until deeply golden and jammy. Cool slightly.

2. 2

   Mix into rice

   Fold the caramelized onion and salt into the warm cooked rice until evenly distributed.

3. 3

   Shape the cakes

   With wet hands, press the rice mixture firmly into 8 thick disks or triangles, packing tightly so they hold together.

4. 4

   Make the glaze

   Whisk soy sauce, mirin, and sugar together in a small bowl.

5. 5

   Sear the rice cakes

   Heat oil in a nonstick skillet over medium heat. Cook rice cakes 3-4 minutes per side, pressing down occasionally, until a golden crust forms.

6. 6

   Glaze and finish

   In the last minute of cooking each side, brush generously with the soy glaze and let it caramelize onto the surface. Scatter with sesame seeds and serve hot.

Variations

• •

  Add a spoonful of miso to the glaze for a deeper, more savory finish.

• •

  Mix in furikake or chopped nori instead of onion for a simpler, classic yaki onigiri.

• •

  Top with a slice of melty cheese in the last minute of cooking for a modern izakaya-style version.

Storage

Best eaten immediately while the crust is crisp. Refrigerate leftovers up to 2 days and reheat in a dry skillet over medium heat to re-crisp -- microwaving makes them soft and chewy rather than crisp.

Frequently Asked Questions