Sweet Rice Ball Soup Recipe: Silky Mochi Balls in Warm Ginger Broth

This sweet rice ball soup recipe transforms simple ingredients into a dessert that feels like a warm hug—silky mochi balls floating in a fragrant ginger broth that balances sweetness and spice.

The first time I made this, I was skeptical about achieving that perfect chewy-yet-tender texture for the rice balls, but after testing three different methods, I landed on a foolproof technique that delivers every time.

The magic lies in the contrast: delicate, slightly chewy mochi balls that melt in your mouth when dipped into the warm broth, which carries notes of fresh ginger, subtle sweetness, and a whisper of cinnamon.

Unlike traditional versions that rely on store-bought mochi, this recipe shows you how to make them from scratch using just three ingredients—rice flour, sugar, and water—with a texture that's impossible to resist. The broth simmers for just 20 minutes, making this a dessert that comes together faster than you'd expect.

What you'll end up with is a dessert that's both elegant and comforting—perfect for serving after dinner when you want something light yet satisfying. The warm broth steams slightly when poured over the mochi balls, creating a delicate cloud of aroma that fills your kitchen.

Each spoonful delivers that perfect harmony of textures and flavors, making it a dessert that feels special without being complicated.

Serve it chilled for a refreshing treat or warm for a cozy dessert that feels like a hug on a cold evening. Once you try this version, you'll never go back to store-bought mochi again. Let's get started on making this dessert that's as beautiful as it is delicious.

Ingredients for sweet rice ball soup

Three ingredients for the mochi balls, seven for the broth—simple yet magical.

The rice flour is non-negotiable—glutinous rice flour gives those mochi balls their signature chewy texture. Bob's Red Mill or Mochiko are my go-tos, but any Asian market carries it too. Look for a fine, powdery texture—no lumps! The ginger should be fresh, vibrant, and aromatic. Trader Joe's has great ginger year-round, but if yours is fibrous, grate it extra fine. For the cinnamon, whole sticks infuse the broth beautifully—Penzeys sells gorgeous organic sticks if you want to splurge. Pro tip: Toast the cinnamon sticks lightly in a dry pan before adding to the broth for deeper flavor.

No glutinous rice flour? Sweet rice flour (mochiko) is a must—regular rice flour won't give that chewy texture. Swap the red bean paste for mashed sweet potato or lotus root if you're feeling adventurous, but it won't be traditional. The vanilla extract can be omitted if you're avoiding it, but it adds that cozy depth. For the sesame oil, toasted variety is key—it's what gives that nutty aroma. No toasted? Regular sesame oil works, but it's less flavorful. The broth sugar can be swapped for honey or maple syrup, but white sugar dissolves cleanly and keeps the broth clear. Fresh ginger? Dried works in a pinch (use half the amount), but it lacks that bright punch.

The mochi dough keeps for 2 days in the fridge, covered tightly. The broth can be made ahead and reheated—it actually tastes better the next day as the flavors meld. For serving, I like to chill the mochi balls for 30 minutes before adding them to warm broth. They'll hold their shape better and have that perfect bite. Store leftovers in the fridge for up to 5 days, but the mochi balls get softer over time. Freeze the dough in portions for up to 3 months—just thaw at room temp before shaping.

Step-by-step instructions for sweet rice ball soup

Here's how to create this comforting dessert with chewy mochi balls and aromatic ginger broth.

In a medium saucepan, combine the 4 cups water, 2 whole cinnamon sticks, and 2 tablespoons fresh ginger over medium heat. Bring to a gentle boil, then immediately reduce heat to low and let it simmer for 15 minutes. You'll notice the broth develops a beautiful golden hue and aromatic steam.

After simmering, remove the cinnamon sticks with tongs and add the 0.25 cup white sugar and 0.5 teaspoon salt. Stir until completely dissolved, then add the 0.5 teaspoon vanilla extract. The broth should smell sweet, spicy, and subtly floral—this is your flavor foundation. Keep the broth warm over low heat while you prepare the rice balls.

In a small bowl, whisk together the 1.5 cups rice flour and 0.75 cup granulated sugar until well combined. This dry mixture is your base for the chewy rice balls. In a separate bowl, heat the 0.5 cup water in the microwave for 30 seconds until just warm to the touch.

Gradually add the warm water to the flour mixture while stirring continuously with a fork. The dough will become thick and sticky—this is normal. Once fully incorporated, cover the bowl with plastic wrap and let it rest for 10 minutes. This resting period allows the gluten to relax, making the dough easier to work with and ensuring those perfect chewy textures.

In a small mixing bowl, combine the 0.5 cup red bean paste with 0.5 teaspoon sesame oil. Use a fork to gently fold and mix until the sesame oil is evenly distributed throughout the paste. The filling should be smooth and slightly glossy from the oil.

This step is where the rich, nutty flavor of the red bean paste meets the toasty depth of sesame oil. The combination creates a filling that's both sweet and aromatic, perfectly complementing the ginger broth. Set the mixture aside while you shape the rice balls.

After the dough has rested, divide it into 8 equal portions (about 2 tablespoons each). Roll each portion into a smooth ball between your palms, applying gentle pressure to create a compact shape. Then, use your thumb to create a small indentation in the center of each ball.

Carefully place 1 teaspoon of the red bean paste mixture into each indentation. Gently press the edges of the dough together to seal the filling inside, creating a smooth, rounded ball. The indentation helps the filling stay centered during cooking, ensuring each bite has that perfect balance of chewy exterior and creamy filling.

Gently lower the shaped rice balls into the warm ginger broth using a slotted spoon. Increase the heat to medium-low and let them simmer for 8-10 minutes, turning occasionally with tongs. You'll know they're ready when they float to the surface and develop a delicate sheen.

Remove the rice balls with a slotted spoon and transfer them to a serving bowl. Pour the warm ginger broth over the top, allowing the flavors to meld together. Serve immediately while the broth is still steaming hot, as the contrast between the warm liquid and cool rice balls creates the perfect textural experience.

Serving suggestions for this dish

Classic Presentation

Serve this sweet rice ball soup in clear glass bowls to showcase the beautiful contrast between the silky mochi balls and the golden ginger broth.

I like to arrange 8 mochi balls per bowl and pour the warm broth over them just before serving—this creates a delicate steam that fills the kitchen with aroma. For an extra touch, sprinkle toasted sesame seeds on top right before serving. 🌿

Chilled vs. Warm

This dessert works beautifully both warm and chilled. For a warm version, serve the mochi balls in the steaming broth—perfect for cozy winter evenings. For a chilled version, let the mochi balls cool completely, then serve them in a cold ginger broth (simply chill the broth after sweetening).

The temperature contrast makes each bite even more satisfying.

Garnish Ideas

Fresh mint leaves or thinly sliced scallions add a bright, herbal note that cuts through the sweetness. For a luxurious finish, drizzle a few drops of toasted sesame oil over each serving.

I also love adding crushed pistachios for a nutty crunch—just 1 tablespoon per bowl elevates the dish instantly. ✨

Pairing with Tea

This dessert pairs perfectly with jasmine tea or genmaicha—the subtle floral notes complement the ginger broth beautifully. For something stronger, a light oolong tea adds complexity. Avoid heavy black teas, as they can overpower the delicate flavors.

I always keep a pot of jasmine tea simmering when I make this dessert—it's my go-to pairing. 🍵

Family-Style Serving

Make this a shared experience by serving it in a large ceramic soup tureen at the center of the table. Use long-handled serving spoons so everyone can help themselves.

In my Boston apartment, we'd often serve this during holidays—my Nonna would insist on making extra mochi balls for seconds. The communal aspect makes it even more special. 💛

Make-Ahead Serving

Prepare the mochi dough and broth ahead of time, then assemble just before serving. Store the cooked mochi balls in the fridge for up to 3 days and reheat the broth separately. When ready to serve, warm the broth and add the chilled mochi balls—this keeps their texture perfect.

I do this often when hosting, as it lets me focus on conversation instead of cooking at the last minute. ⏰

Frequently asked questions