Name: Japanese Potato Mochi Recipe
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Ingredients: 1 pound russet potatoes, peeled and cut into chunks; 3-4 tablespoons potato starch; 1 tablespoon sugar; 1/2 teaspoon fine sea salt; 1 tablespoon unsalted butter, softened; 2 tablespoons soy sauce; 2 tablespoons mirin; 1 tablespoon sugar; 1 tablespoon unsalted butter; 1-2 tablespoons shredded mozzarella or mild melting cheese; 1 tablespoon finely chopped green onion; 1 teaspoon toasted sesame seeds; 1 small sheet nori, cut into thin strips; Japanese mayonnaise, for drizzling; shichimi togarashi, for a pinch of gentle heat

Japanese Potato Mochi Recipe tastes like a chewy, crispy, buttery potato pancake that met a stretchy piece of mochi and decided to become best friends. It works perfectly for snack lovers, picky eaters, and busy cooks, and you can finish it in about 35 minutes from start to finish. I tested this version on my own very opinionated family, and the plate vanished before I sat down.

Why You Should Try This Japanese Potato Mochi Recipe

This Japanese Potato Mochi Recipe gives you a chewy center, a lightly crisp exterior, and a salty-sweet soy butter glaze that hits every craving at once. It feels like comfort food, but it still looks cute enough to serve to guests or bring to a potluck.

You only need simple ingredients like potatoes, starch, and pantry sauces, so you skip any specialty-store hunt. You can also pan fry them in a small skillet, so you avoid deep frying and huge oil cleanups.

“These little potato mochi bites taste like chewy gnocchi in a soy-butter hug, and I could eat the whole batch by myself. ★★★★★”

Ingredients You’ll Need

Main ingredients

1 pound (450 g) russet potatoes, peeled and cut into chunks
- Russets give a fluffy texture that mixes well with starch. You can use Yukon Golds for a slightly creamier, richer result.
3 to 4 tablespoons potato starch
- Potato starch keeps the mochi chewy and bouncy. You can use cornstarch in a pinch, but the texture turns a bit firmer.
1 tablespoon sugar
- White granulated sugar works best. You can swap in light brown sugar for a deeper flavor.
½ teaspoon fine sea salt
1 tablespoon unsalted butter, softened
- I like Kerrygold or any good-quality butter, since you taste it in every bite.

Soy butter glaze

2 tablespoons soy sauce
- Use regular Japanese-style soy sauce; Kikkoman or Yamasa both work nicely.
2 tablespoons mirin
- Mirin adds sweetness and gloss; if you do not have it, mix 1½ tablespoons sugar with 2 tablespoons water as a quick stand-in.
1 tablespoon sugar
1 tablespoon unsalted butter

Optional toppings and add-ins

Pick one or mix a couple to keep things interesting.

1 to 2 tablespoons shredded mozzarella or mild melting cheese
- Fold into the dough for cheesy potato mochi.
1 tablespoon finely chopped green onion
1 teaspoon toasted sesame seeds
A small sheet of nori, cut into thin strips
A drizzle of Japanese mayonnaise
A pinch of shichimi togarashi for gentle heat

Pantry shortcuts

Use bottled teriyaki sauce instead of the soy butter glaze if you want a shortcut. Just thin it with a splash of water so it does not burn.
Use instant mashed potatoes if you feel tired: prepare them thick, then stir in starch and seasonings until the dough feels smooth and pliable.

Equipment

Medium pot for boiling potatoes
Colander
Potato masher or sturdy fork
Mixing bowl
Nonstick skillet or well-seasoned cast iron pan
Silicone spatula or wooden spoon
Measuring cups and spoons
Brush or spoon for glazing

Tips & Tricks

Boil potato chunks in cold salted water and bring them up to a simmer so they cook evenly and do not burst.
Drain potatoes very well, then return them to the hot pot for 1 to 2 minutes to steam off extra moisture.
Mash potatoes until smooth with no lumps so the mochi turns chewy instead of crumbly.
Add potato starch gradually and stop when the dough feels soft, smooth, and slightly sticky but still holds its shape.
Lightly oil your hands when you shape the dough so it does not cling to your fingers.
Keep the patties small, about 2 inches wide, so the centers cook through before the outside browns too much.
Use medium-low heat to pan fry; high heat burns the glaze and crust before the inside turns chewy.
Swirl the soy butter glaze in the pan near the end and coat both sides so it thickens and clings to the mochi.
Serve potato mochi hot or warm; the texture feels chewiest and stretchiest right out of the pan.
If you add cheese, tuck it inside the dough so it does not leak and burn in the pan.

How to Make Japanese Potato Mochi Recipe

Step 1: Cook the potatoes

Peel the potatoes and cut them into even chunks about 1½ inches wide.
Place them in a pot, cover with cold water by about 1 inch, and add a small pinch of salt.
Bring the pot to a gentle boil, then reduce to a simmer and cook 12 to 15 minutes until the potatoes feel very tender when you poke them with a fork.
Drain the potatoes in a colander, then return them to the hot pot and shake the pot over low heat for 1 to 2 minutes to dry them out.

Step 2: Mash and season

Mash the hot potatoes until they look very smooth with no visible chunks.
Add the butter, sugar, and salt, and mix until the butter melts and everything blends evenly.
Sprinkle in 3 tablespoons of potato starch and stir until a soft dough forms.
Touch the dough: if it feels too sticky to handle, add the remaining 1 tablespoon starch and mix again.

Step 3: Add mix-ins and shape

If you use cheese, green onion, or sesame seeds, fold them gently into the warm potato dough.
Divide the dough into 8 to 10 equal pieces, depending on the size you want.
Lightly oil your hands, roll each piece into a ball, then flatten it into a thick disc about ½ inch thick.
Place the shaped discs on a plate or tray and keep them covered with a clean kitchen towel so they do not dry out.

Step 4: Pan fry the potato mochi

Heat a nonstick skillet over medium-low heat and add a thin layer of neutral oil.
Arrange the potato mochi discs in the pan with a little space between each piece.
Cook 3 to 4 minutes on the first side until the bottom turns golden and crisp.
Flip and cook another 3 to 4 minutes until the second side browns and the centers feel springy when you press them gently.

Step 5: Make the soy butter glaze

While the mochi cooks, stir together soy sauce, mirin, and sugar in a small bowl.
When the mochi finishes browning, push them to the edges of the pan and lower the heat.
Pour the sauce mixture into the center of the pan and let it bubble for 30 to 60 seconds while you stir so the sugar dissolves.
Add the butter and swirl until it melts and the sauce thickens slightly.

Step 6: Coat and serve

Toss or flip the potato mochi in the pan so the soy butter glaze coats both sides.
Cook another 30 seconds to 1 minute until the glaze looks glossy and clings to the surface.
Transfer the mochi to a serving plate and spoon any extra glaze over the top.
Garnish with green onions, sesame seeds, nori strips, or a small drizzle of Japanese mayonnaise, then serve hot.

What to Serve with Japanese Potato Mochi Recipe

Japanese Potato Mochi Recipe pairs nicely with miso soup, a simple cucumber salad, or a bowl of steamed rice for a comforting meal. You can also serve it as a side with grilled chicken, teriyaki tofu, or baked salmon. Kids love it with sliced fruit and a small salad, kind of like a bento-style snack plate. If you host a casual gathering, set it out with edamame, veggie sticks, and a soy-sesame dipping sauce for an easy spread.

Storage Options

Store leftover potato mochi in an airtight container in the fridge for up to 3 days.
Place parchment between layers so they do not stick together.
Freeze cooked mochi on a tray until firm, then move them to a freezer bag and keep them up to 1 month.
Reheat in a lightly oiled skillet over medium-low heat until hot and crisp again, or air fry at 350°F (175°C) for 4 to 6 minutes, flipping once.
Avoid microwaving as the texture turns tough and loses that nice chewy bite.