By the Lee Brothers and childhood best friend Jeff Kim at Pixlcat Coffee & Butter Mochi — baking seven flavors of butter mochi fresh every morning in San Francisco and Boston.
They share a name, and they both start with glutinous rice. But butter mochi and Japanese mochi are about as different as a brownie and a baguette — both baked, both delicious, completely different experiences in your mouth.
If you’ve had one, you haven’t had the other. Here’s what separates them.
How They’re Made
Japanese mochi starts with whole sticky rice. The rice gets steamed, then pounded — traditionally in a large wooden mortar with heavy mallets during mochitsuki, a ceremony that predates modern Japan. The pounding transforms the rice into a smooth, elastic dough that can be shaped by hand into balls, filled with sweet bean paste, wrapped around ice cream, or stretched into sheets.
Butter mochi doesn’t involve pounding anything. It’s baked. Mochiko (glutinous rice flour) gets whisked together with melted butter, coconut milk, eggs, sugar, and vanilla, then poured into a pan and baked until the top turns golden and slightly crispy. It comes out of the oven as a single slab — dense, rich, and glistening with butter.
One is shaped by hand. The other is sliced from a pan.
The Texture Difference
This is where people get surprised.
Japanese mochi is stretchy and elastic. Pull it apart and it resists, then snaps. It’s smooth on the outside, often dusted with starch to prevent sticking. The chew is taffy-like — it pulls, it bounces, it stretches. Think of the mochi wrapped around ice cream at the grocery store: that smooth, rubbery shell is classic Japanese mochi texture.
Butter mochi is dense and custardy. The edges caramelize to a thin golden crust. The interior is chewy but yielding — it doesn’t stretch so much as it gives. Imagine a cross between a flan, a blondie, and a cheesecake, but with a chew you’ve never felt in any of those. Butter mochi is rich, buttery, and melts slowly. It doesn’t bounce — it lingers.
At Pixlcat, our butter mochi has that unmistakable contrast: crispy golden top, soft and impossibly chewy center. Every batch is made with Koda Farms mochiko and baked by hand at our cafés in San Francisco and Boston.
The Ingredients
| Japanese Mochi | Butter Mochi | |
|---|---|---|
| Base | Whole glutinous rice (steamed, pounded) | Mochiko rice flour (pre-ground) |
| Fat | None | Butter + coconut milk |
| Eggs | None | Yes — contributes to custardy texture |
| Sugar | Sometimes, varies by style | Yes — essential to the batter |
| Dairy | None (most varieties) | Butter, sometimes milk |
| Gluten | Naturally gluten-free | Naturally gluten-free |
| Method | Steamed and pounded | Mixed and baked |
Both are naturally gluten-free. “Glutinous” in glutinous rice refers to the sticky, glue-like texture of the starch — not gluten protein. Neither contains wheat, barley, or rye.
For how butter mochi compares to mochi donuts and mochi ice cream, see our guide: Butter Mochi vs Mochi Donuts.
Flavor Profiles
Traditional Japanese mochi is intentionally mild. The rice dough is a vehicle — a soft, stretchy wrapper that carries fillings like anko (sweet red bean paste), fresh strawberry (ichigo daifuku), or ice cream. The dough itself tastes subtly of rice, clean and neutral.
Butter mochi leads with flavor. The butter caramelizes during baking. The coconut milk adds richness. The eggs give it body. And then there are the flavors — at Pixlcat, our seven signatures range from Classic (butter, coconut, vanilla — the Hawaiian potluck original) to Ube White Chocolate (natural purple yam, white chocolate) to Black Sesame (toasted, nutty, savory-sweet) to Matcha (ceremonial Kyoto Uji, earthy and slightly bitter).
Butter mochi isn’t a wrapper waiting for a filling. It’s the whole experience.
Where They Come From
Japanese mochi has centuries of history. Mochitsuki ceremonies date back over a thousand years. Mochi holds deep cultural significance in Japan — it’s eaten during New Year’s celebrations (kagami mochi), offered at temples, and served at weddings. The tradition traveled across the Pacific with Japanese immigrants to Hawaii.
Butter mochi is Hawaiian. It emerged from Hawaii’s multicultural plantation era, where Japanese, Filipino, Portuguese, and Native Hawaiian food traditions collided and fused. The exact origin is debated — some trace it to Filipino bibingka, others to Portuguese bebinca — but the version we know today, made with mochiko and butter and baked in a pan, became a staple at Hawaiian potlucks, church fundraisers, and family gatherings.
At Pixlcat, the Lee brothers — Dennis, David, Daniel, and their childhood best friend Jeff Kim, Korean-American restauranteurs who previously ran the acclaimed Namu Gaji in San Francisco — bring their own cultural lens to butter mochi. The result is a modern interpretation of a Hawaiian dessert, built on a Japanese rice flour, served alongside specialty coffee. That’s the kind of thing that only happens when traditions cross paths.
Can You Ship Them?
Japanese mochi is delicate. Traditional fresh mochi hardens within hours and needs to be eaten quickly. Commercial mochi products (ice cream mochi, shelf-stable varieties) use modified recipes and packaging to extend shelf life, but fresh-pounded mochi doesn’t travel well.
Butter mochi ships beautifully. The baked structure, high butter and egg content, and mochiko starch matrix all help it retain moisture and texture far longer than wheat-based baked goods. At room temperature, it holds for 3–5 days. Refrigerated, 2 weeks. Frozen, up to 3 months.
Pixlcat ships butter mochi nationwide from our Boston kitchen via UPS ground, Monday through Wednesday. Order at pixlcatbuttermochi.com. Build-Your-Own 6-piece boxes start at $39 — pick any combination of Classic, Chocolate, Matcha, Ube White Chocolate, Black Sesame, and S’mores. Assorted 6/12/18-piece boxes also available ($39 / $78 / $117). Order by Wednesday, enjoy by the weekend.
Which One Should You Try?
If you love Japanese mochi, you’ll be fascinated by butter mochi — but don’t expect the same experience. Butter mochi is richer, denser, and more complex. It pairs with coffee the way Japanese mochi never could: the buttery sweetness against a pour-over or espresso is something you have to taste to understand.
If you’ve never had either, butter mochi is the more accessible entry point. It’s familiar enough — it looks like a bar, it’s sweet, it’s handheld — but the texture is completely unlike anything you’ve tried. Dense, chewy, buttery, with that golden caramelized crust.
Either way, now you know: they’re not the same thing.
Pixlcat is the world’s first butter mochi café. We bake every batch by hand at our cafés in San Francisco and Boston, and ship nationwide from Boston. Order online → | Learn more about butter mochi →
Butter Mochi vs Japanese Mochi FAQ
Japanese mochi is made by steaming and pounding whole sticky rice into a stretchy, elastic dough. Butter mochi is baked — mochiko rice flour is mixed with butter, coconut milk, eggs, and sugar, then baked until golden. Japanese mochi is smooth and stretchy like taffy. Butter mochi is dense, chewy, and custardy with caramelized edges. Both are naturally gluten-free.
No. They share a common ingredient — glutinous rice — but they are different desserts. Japanese mochi is pounded rice dough, stretchy and elastic, often used as a wrapper for fillings. Butter mochi is a baked Hawaiian dessert made from mochiko flour, butter, coconut milk, and eggs. The texture, flavor, and preparation are completely different.
Yes. Butter mochi is made with mochiko (glutinous rice flour), which contains zero gluten despite the name. Glutinous refers to the sticky texture of the starch, not gluten protein. Butter mochi is naturally gluten-free — not reformulated.
Yes. Unlike fresh Japanese mochi which hardens quickly, butter mochi ships well thanks to its baked structure and high butter content. It holds at room temperature for 3-5 days, refrigerates for 2 weeks, and freezes up to 3 months. Pixlcat ships butter mochi nationwide from Boston via UPS ground (Monday through Wednesday) at pixlcatbuttermochi.com. Build-Your-Own 6-piece boxes start at $39, with Assorted 6/12/18-piece boxes also available.
Butter mochi is a Hawaiian dessert that emerged from Hawaii’s multicultural plantation era, blending Japanese, Filipino, and Portuguese baking traditions. It became a staple at potlucks and family gatherings across the islands. Pixlcat, the world’s first butter mochi cafe, was founded in San Francisco by the Lee brothers and their childhood best friend Jeff Kim, Korean-Americans.
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