Kusa Mochi (草餅), meaning "grass rice cake," is a traditional Japanese sweet made from soft, chewy glutinous rice and flavored with yomogi (Japanese mugwort). Its beautiful green color, refreshing herbal aroma, and delicate sweetness make it one of Japan's most cherished seasonal wagashi (traditional confections). Often filled with sweet red bean paste (anko), Kusa Mochi is especially popular during spring, when fresh mugwort is harvested, and is enjoyed during festivals, tea ceremonies, and family gatherings.

This timeless dessert perfectly reflects the Japanese appreciation for nature, seasonality, and simple yet elegant flavors.

What is Kusa Mochi?

Kusa Mochi is a variation of traditional mochi made by kneading cooked glutinous rice or sweet rice flour with yomogi, an aromatic herb known as Japanese mugwort. The herb gives the mochi its vibrant green color and distinctive earthy flavor.

Traditionally, Kusa Mochi is:

  • Filled with smooth or chunky sweet red bean paste (anko)
  • Rolled in roasted soybean flour (kinako)
  • Served with Japanese green tea
  • Enjoyed during spring festivals and Hinamatsuri (Girls' Day)

The chewy texture of the mochi combined with the sweet bean filling creates a delightful balance of flavors.

Why You'll Love This Recipe

  • Authentic Japanese wagashi
  • Soft and chewy texture
  • Naturally flavored with aromatic mugwort
  • Beautiful spring-inspired color
  • Perfect for tea time or dessert
  • Easy to prepare with sweet rice flour
  • Naturally gluten-free (using pure glutinous rice flour)
  • Great for special occasions

Preparation Time

  • Prep Time: 20 minutes
  • Cook Time: 15 minutes
  • Total Time: 35 minutes

Servings: 10 pieces

Ingredients

For the Mochi Dough

  • 2 cups glutinous rice flour (mochiko)
  • 1¼ cups water
  • 2 tablespoons sugar
  • 2 tablespoons fresh yomogi (Japanese mugwort), finely chopped and blanched
    • Or 1 tablespoon dried yomogi powder rehydrated with warm water

For the Filling

  • 1 cup sweet red bean paste (anko)
  • Divide into 10 equal balls

For Dusting

  • Potato starch or cornstarch
  • Kinako (roasted soybean flour), optional

Kitchen Equipment

  • Mixing bowl
  • Silicone spatula
  • Microwave-safe bowl or steamer
  • Saucepan (if steaming)
  • Rolling mat or clean work surface
  • Small scoop or spoon

Step-by-Step Instructions

Step 1: Prepare the Mugwort

If using fresh yomogi:

  1. Wash the leaves thoroughly.
  2. Blanch them in boiling water for about 1 minute.
  3. Transfer immediately to ice water.
  4. Squeeze out excess moisture.
  5. Finely chop or blend into a smooth paste.

If using dried yomogi powder, soak it in warm water for a few minutes before use.

Step 2: Make the Mochi Dough

In a mixing bowl, combine:

  • Glutinous rice flour
  • Sugar
  • Water
  • Prepared yomogi

Mix until smooth and free of lumps.

Step 3: Cook the Dough

Microwave Method

Cover the bowl loosely.

Microwave for 2 minutes.

Stir well.

Microwave for another 2 minutes.

Stir again.

Microwave for a final 1–2 minutes until the dough becomes glossy, sticky, and fully cooked.

Steaming Method

Steam the mixture for about 20 minutes, stirring once halfway through until smooth and elastic.

Step 4: Prepare the Filling

While the dough cools slightly, divide the sweet red bean paste into 10 equal portions and roll them into smooth balls.

Step 5: Shape the Mochi

Dust your hands and work surface with potato starch.

Divide the warm mochi dough into 10 equal pieces.

Flatten each piece into a small circle.

Place one ball of red bean paste in the center.

Carefully wrap the dough around the filling, pinching the edges to seal completely.

Roll gently into a smooth ball.

Step 6: Finish

Lightly dust each Kusa Mochi with potato starch or coat it with kinako for extra flavor.

Arrange on a serving plate.

Serve slightly warm or at room temperature.

Chef's Tips

  • Fresh yomogi provides the most authentic flavor and color.
  • Keep your hands dusted with starch to prevent sticking.
  • Avoid overcooking the mochi, as it can become tough.
  • Smooth anko makes shaping easier.
  • Serve on the same day for the softest texture.
  • Pair with Japanese green tea for a traditional experience.

Delicious Variations

Kinako Kusa Mochi

Roll the finished mochi generously in roasted soybean flour for a nutty finish.

Matcha Kusa Mochi

Add a small amount of matcha powder to the dough for extra depth and a richer green color.

White Bean Filling

Replace red bean paste with sweet white bean paste (shiro-an) for a milder flavor.

Walnut Kusa Mochi

Mix finely chopped toasted walnuts into the filling for added texture.

Sesame Kusa Mochi

Fill with sweet black sesame paste instead of red bean paste.

Mini Kusa Mochi

Shape into bite-sized pieces for tea parties or festive dessert platters.

What Makes Kusa Mochi Special?

Kusa Mochi stands out among Japanese sweets because of its use of yomogi, an herb long associated with spring and good fortune. The subtle herbal aroma balances the sweetness of the red bean filling, while the chewy mochi offers a uniquely satisfying texture. Its vibrant green color and seasonal symbolism make it a favorite during celebrations and traditional tea gatherings.

Nutritional Benefits

Kusa Mochi offers several nutritional advantages:

  • Complex carbohydrates from glutinous rice
  • Dietary fiber from red bean paste
  • Antioxidants and plant compounds from yomogi
  • Low in saturated fat
  • Naturally gluten-free when made with pure glutinous rice flour
  • Moderate sweetness compared to many desserts

Approximate Nutrition (Per Piece)

  • Calories: 150 kcal
  • Protein: 3 g
  • Carbohydrates: 32 g
  • Fat: 1 g
  • Fiber: 2 g
  • Sodium: 20 mg

Best Pairings

Enjoy Kusa Mochi with:

  • Matcha (Japanese powdered green tea)
  • Sencha green tea
  • Hojicha (roasted green tea)
  • Genmaicha (green tea with roasted rice)
  • Sakura tea
  • Fresh seasonal fruit
  • Mild Japanese sweets for a traditional tea spread

Storage Tips

Room Temperature

Store in an airtight container for up to 1 day.

Refrigerator

Refrigerate for up to 2 days, but note that mochi may become firmer. Let it come to room temperature before serving.

Freezer

Freeze individually wrapped mochi for up to 1 month. Thaw at room temperature before enjoying.

Common Mistakes to Avoid

  • Using too much mugwort, which can make the flavor bitter
  • Overcooking the mochi dough
  • Skipping the starch when shaping
  • Overfilling the mochi, causing it to split
  • Refrigerating uncovered, which dries out the mochi
  • Serving straight from the refrigerator without allowing it to soften

Frequently Asked Questions

What is yomogi?

Yomogi is Japanese mugwort, an aromatic herb traditionally used in Japanese sweets and herbal cuisine. It gives Kusa Mochi its signature green color and fresh, earthy flavor.

Can I use dried mugwort?

Yes. Dried yomogi powder is widely available and makes a convenient substitute for fresh leaves. Rehydrate it before mixing into the dough.

Is Kusa Mochi gluten-free?

Yes, when made with 100% glutinous rice flour and gluten-free fillings, Kusa Mochi is naturally gluten-free.

Can I make Kusa Mochi without red bean paste?

Absolutely. You can fill it with white bean paste, black sesame paste, sweet chestnut paste, or even leave it unfilled.

Why is Kusa Mochi green?

Its natural green color comes from yomogi (Japanese mugwort), not food coloring. The herb also contributes its distinctive aroma and flavor.

Final Thoughts

Kusa Mochi is a beautiful expression of Japan's seasonal culinary traditions. Its soft, chewy texture, fragrant mugwort-infused dough, and sweet red bean filling create a harmonious dessert that's both comforting and elegant. Whether served during a spring celebration, enjoyed with a cup of green tea, or prepared as a homemade wagashi, Kusa Mochi offers a delicious way to experience the timeless flavors of Japanese confectionery.