This is mochi with a dramatic black-purple twist. Made from glutinous wild black rice, this homemade mochi is rich in antioxidants and nutrients, with a slightly nutty flavor compared to white mochi and a gorgeous deep purple color. Below you’ll find a clear, easy-to-follow method for making wild black rice mochi with a mochi maker.

I’m excited to share this recipe. My Brown Rice Mochi post was the most popular on my blog and inspired me to experiment with other mochi variations, including a two-ingredient sweet potato dango and tofu mochi made in the microwave. This recipe is one of my wilder experiments: using glutinous wild black rice to make mochi.
What is Glutinous Wild Black Rice?
Glutinous wild black rice (often called forbidden rice) is a whole-grain rice variety used across East Asia. Historically prized in China, it remains more expensive than common rice but offers notable health benefits. Its dark purple-black hue comes from anthocyanins—powerful antioxidants linked to anti-inflammatory and immune-supporting properties. In fact, black rice has among the highest antioxidant activity of rice varieties.
Why You’ll Love This Recipe
- Naturally gluten-free and whole grain
- Sticky, sweet and slightly nutty texture
- Beautiful deep purple color
- High in antioxidants, fiber, vitamins and minerals
- Supports eye and heart health
- Great for boosting immune health

Ingredients & Equipment
Notes: Many specialty ingredients and tools are available online and in natural food sections. Use glutinous (sweet) wild black rice specifically—regular wild/forbidden rice won’t yield the same result.
- Glutinous wild black rice (also called black sweet rice) — glutinous rice becomes sticky and chewy when steamed and pounded, which is essential for mochi.
- You can substitute glutinous white or brown sweet rice, but the texture and soaking times differ.
- Mochi maker — a dedicated appliance that steams and pounds soaked rice into mochi. Popular brands include Tiger and Zojirushi. A mochi maker is convenient if you plan to make mochi regularly.
⚠️ Important: Make sure you use glutinous or sweet wild black rice when making mochi. Regular wild black rice (non-glutinous) will produce different, undesirable results.

How to Make
How to Make Wild Black Rice Mochi
STEP 1
Wash and rinse the glutinous wild black rice until the water runs clear.
STEP 2
Soak the rice overnight in plenty of water (about 2 cups water per cup rice). After about 8–12 hours drain and refill the bowl so the rice stays submerged, then refrigerate for another 36 hours to fully hydrate and soften the grain. Glutinous white rice needs a much shorter soak (8–12 hours); glutinous wild black rice benefits from the extended soak.
STEP 3
Drain and pulse the soaked rice in a food processor until it forms a coarse flour resembling sand. This optional step helps break down the tougher outer husk of wild black rice and yields a smoother mochi.
STEP 4
Fill the mochi maker’s water reservoir (usually about 2 cups) according to the manufacturer’s instructions.
STEP 5
Place the steamer bowl into the machine and add the ground glutinous wild black rice.
STEP 6
Close the lid and press STEAM. The machine will steam the rice (about 30 minutes) and signal when finished.
STEP 7
When steaming finishes, open the lid and press POUND to start the pounding cycle.
STEP 8
As the rice begins to mix, add salt, sugar and at least 1/2 cup water, increasing the water as needed. Glutinous wild black rice is tougher than white or brown varieties, so extra water helps the machine operate smoothly.
STEP 9
Tip: You may need to pause and scrape the sides of the steamer bowl with a spatula while the mochi churns, and add more water if it becomes dry.
STEP 10
It takes roughly five minutes for the texture to start smoothing, and about 15–20 minutes total of pounding for a supple, smooth mochi.
STEP 11
There is no exact alarm for when the mochi is finished; stop the machine when the dough looks smooth and elastic.
STEP 12
Pour the mochi onto a tray greased with oil (sesame or neutral oil). Use a silicone spatula or oiled fingers to press it evenly into the pan.
STEP 13
Once cooled, turn the mochi over and cut into squares with scissors or a sharp knife.
STEP 14
Enjoy immediately, or freeze single layers in a large bag for later. Thaw at room temperature or microwave briefly to soften.
Variations & Serving Ideas
1. Filling Ideas
- Sweetened red bean paste (koshi-an) — a classic mochi filling used in many desserts.
- Sweetened white bean paste (shiro-an) — a milder alternative to red bean paste.
- Ice cream — wrap small portions of ice cream in chilled mochi for mochi ice cream.
- Other fillings: nut butters, fruit preserves, or chocolate spreads.
2. Waffle the Mochi
How to Waffle Glutinous Wild Black Rice Mochi
Place mochi squares on a preheated waffle iron and cook about 3 minutes. They’ll puff and crisp slightly—great as a snack or breakfast item.


Is “Glutinous” Rice Gluten-Free?
Yes. “Glutinous” describes the rice’s sticky texture, not gluten protein. Glutinous rice is naturally gluten-free, making it suitable for gluten-free diets.

More Mochi Posts You’ll Love
Wild Black Sweet Rice Mochi (Using a Mochi Maker)
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2 days
1 hour
Dessert
Japanese, Korean
10 servings
Ingredients
SOAK THE RICE IN WATER OVERNIGHT
- 5 cups glutinous wild black rice uncooked, whole grain
- enough water for soaking
ADD TO THE STEAMER
- 2 cups water
ADD DURING THE POUNDING PROCESS
- 1 tsp salt
- 3 Tbsp granulated sugar (optional)
- ¼ to ½ cups water (add as needed)
USE AFTER THE MOCHI IS OUT OF THE MACHINE
- oil sesame, olive, canola or vegetable oil for greasing
- mochi filling (optional) sweetened beans, ice cream, Nutella, etc.
Instructions
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Wash, rinse and soak 5 cups glutinous wild black rice in 8–10 cups water overnight (8–12 hours). Drain and refill with water so rice stays submerged, then refrigerate for an additional 36 hours to fully hydrate and soften the grain.
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After soaking, drain and pulse the rice in a food processor until it resembles coarse sand. Transfer to the mochi maker’s steamer bowl.
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Fill the mochi maker reservoir with 2 cups water and place the steamer bowl in position.
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Close the lid and press STEAM. When steaming is complete, press POUND to begin pounding.
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Open the lid during pounding and sprinkle in salt and sugar, then add ¼–½ cup water or more as needed. Scrape the sides if the dough sticks and continue pounding until smooth and elastic (about 15–20 minutes).
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Pour the finished mochi onto an oiled tray, spread evenly, allow to cool, then cut into portions. Serve fresh, freeze single layers for storage, or toast/waffle for variation.
Notes
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