Mochi brownies are chocolate brownies made with sweet rice flour, which gives them a dense, stretchy, pleasantly chewy bite beneath a thin, crisp top. This easy version uses melted chocolate, cocoa, and coconut milk for deep chocolate flavor and a soft center; cut the cooled slab into small squares for dessert or a snack.
Ingredients
- 1/2 cup (113 g) unsalted butter, cut into pieces
- 6 oz (170 g) semisweet chocolate, finely chopped
- 2 cups (240 g) sweet rice flour, also labeled glutinous rice flour or mochiko
- 1/2 cup (45 g) unsweetened cocoa powder
- 1 teaspoon (4 g) baking powder
- 1/2 teaspoon (3 g) fine salt
- 1 cup (200 g) packed light brown sugar
- 1/2 cup (100 g) granulated sugar
- 2 large eggs (about 100 g without shells), at room temperature
- 1 can (13.5 fl oz / 400 ml) full-fat coconut milk, well shaken
- 2 teaspoons (10 ml) vanilla extract
- 1/2 cup (85 g) semisweet chocolate chips, optional
Instructions
- Prepare the pan and oven. Heat the oven to 350°F (177°C). Line a 9-by-13-inch (23-by-33-cm) metal baking pan with parchment, leaving a little overhang on two sides so you can lift out the cooled brownies. Lightly grease any exposed sides. A metal pan heats evenly and gives the edges a better chance to set; a glass pan may need a few extra minutes, so rely on the doneness checks rather than the clock alone.
- Melt the butter and chocolate. Put the butter and chopped semisweet chocolate in a heatproof bowl. Melt them in the microwave in 20- to 30-second bursts, stirring between each, or set the bowl over a saucepan of gently simmering water without letting the bowl touch the water. Stir until smooth, then set aside to cool until warm rather than hot, about 5 to 10 minutes. Very hot chocolate can scramble the eggs when the mixtures are combined.
- Combine the dry ingredients. In a large bowl, whisk the sweet rice flour, cocoa, baking powder, and salt until the cocoa is evenly distributed and no large lumps remain. Sifting the cocoa is helpful if it is especially clumpy. Sweet rice flour is not interchangeable with ordinary rice flour: it is made from glutinous rice and creates the characteristic elastic chew. Despite the name, it contains no gluten.
- Mix the wet ingredients. In a separate bowl, whisk the brown sugar, granulated sugar, and eggs until combined and slightly glossy, about 1 minute. Whisk in the coconut milk and vanilla. Slowly pour in the warm chocolate mixture while whisking, then continue until the color looks even. If the coconut milk has separated in the can, shake the closed can thoroughly or whisk its contents smooth before measuring.
- Make the batter. Pour the wet mixture into the dry ingredients and whisk or stir with a sturdy spatula until no dry patches remain. The batter will be looser and more fluid than standard brownie batter; that is normal for a rice-flour mochi bake. Scrape the bottom and corners of the bowl, where flour can hide. Fold in the chocolate chips, if using. Avoid prolonged beating once the batter is smooth.
- Fill the pan and bake. Scrape the batter into the prepared pan and spread it level into the corners. Bake on the center rack for about 55 minutes. The top should look set, and the edges should be firm and slightly pulled from the pan while the center remains springy. For the egg-safety check, insert a food thermometer into the middle without touching the pan; the center should reach 160°F (71°C), the USDA FSIS safe minimum temperature for egg dishes. If it has not reached that temperature, bake for another 3 to 5 minutes and check again. A toothpick may come out sticky because the rice-flour center stays moist, so do not wait for it to look like a dry cake.
- Cool completely before slicing. Set the pan on a rack and let the brownies cool in the pan for at least 90 minutes. The center firms and becomes chewier as it cools, and cutting while warm can make the squares seem gummy or cause them to tear. Use the parchment overhang to lift the slab onto a board. With a sharp knife, cut it into 16 squares, wiping the blade between cuts for cleaner edges.
Tips
- Choose the right flour. Look for sweet rice flour, mochiko, or glutinous rice flour at Asian grocery stores or in the international aisle. Regular rice flour, tapioca starch, and all-purpose flour behave differently and will not give this recipe the same mochi-like texture.
- Measure flour by weight when possible. If using cups, fluff the flour, spoon it into the measuring cup, and level the top instead of packing it down. Too much flour makes the brownies firm and dry rather than supple.
- Use coconut milk, not coconut beverage. Canned full-fat coconut milk brings richness and moisture. Carton coconut beverage is much thinner and can leave the bake less tender. If you need a dairy-free recipe, this one is already dairy-free when you use dairy-free chocolate and chips.
- Let the slab cool fully. The center is meant to be moist and chewy, but it should not be liquid. Check the temperature and allow the full cooling time before deciding the texture is wrong; warm mochi brownies are naturally softer and stickier.
Serving Suggestions
Serve the squares at room temperature when their chewy texture is most apparent. A small piece is satisfying alongside coffee, black tea, or a glass of milk; the chocolate flavor is rich, so smaller portions work well after a meal. For a plated dessert, warm one square briefly and add a scoop of vanilla ice cream or a spoonful of lightly whipped cream. Fresh strawberries, raspberries, or sliced oranges bring a bright contrast, while a light dusting of cocoa or powdered sugar makes the pieces look finished without adding much sweetness.
For a neat dessert tray, cut the cooled slab into 16 squares and arrange them with a little space between pieces. If you are bringing them to a gathering, keep them covered until serving so the edges do not dry out. They are also easy to pack as individual portions once completely cool; parchment between layers helps keep the tops from sticking together.
Variations
More intense chocolate: Replace the semisweet chocolate chips with chopped dark chocolate, or use bittersweet chocolate for the melted portion. Since darker chocolate is less sweet, the finished brownies will taste more cocoa-forward while keeping the same chewy structure. Avoid adding extra cocoa without adjusting the liquid, because dry cocoa can make the center firm.
Nutty crunch: Fold 1/2 cup (60 g) toasted chopped walnuts or pecans into the batter with the optional chocolate chips. Toasting in a dry skillet over medium-low heat for a few minutes brings out their aroma; cool them before adding so they do not warm the batter.
Matcha swirl: Whisk 1 tablespoon (6 g) matcha with 1 tablespoon (15 ml) warm water until smooth. Stir it into about 1/2 cup (120 ml) of the finished batter, dollop that mixture over the chocolate batter in the pan, and gently swirl with a knife. Matcha adds a grassy, slightly bitter note and changes the appearance, but not the basic baking method.
Salted top: Sprinkle 1/4 teaspoon flaky salt over the batter just before baking. The salt sharpens the chocolate flavor; use a light hand because the batter already contains fine salt. For a coconut-forward variation, sprinkle 1/3 cup (25 g) unsweetened shredded coconut on top, knowing it will toast and add a drier, more textured surface.
Storage and Reheating
Because these brownies are moist, refrigerate them within 2 hours of baking or serving. Once completely cool, store them in an airtight container for 3 to 4 days in the refrigerator. Separate layers with parchment to prevent sticking. Chilling makes the texture firmer and chewier; let a square sit at room temperature for about 15 to 20 minutes before serving if you prefer it softer.
For longer storage, freeze individually wrapped squares in a freezer-safe container for up to 2 months. Thaw in the refrigerator overnight or at room temperature for about 1 hour, keeping them wrapped while they thaw to limit condensation. To warm a serving, microwave it for 8 to 12 seconds, then check and add a few seconds if needed. The aim is just to take the chill off; heating too long can make the center overly soft and sticky. Refrigerate any leftovers again within 2 hours.
Frequently Asked Questions
Are mochi brownies supposed to be gooey?
They should be moist, dense, and chewy, with a springy center, but not raw or liquid. The rice flour gives them a different texture from a conventional brownie, and the center firms as it cools. Check that the middle reaches 160°F (71°C), then let the pan cool fully before judging the final texture.
Can I use regular rice flour instead of sweet rice flour?
No, not for the same result. Regular rice flour does not have the sticky, elastic quality of sweet rice flour, so the brownies will be less chewy and may turn crumbly or cake-like. Look for a package labeled sweet rice flour, glutinous rice flour, or mochiko; those names describe the flour needed here.
Can I make these brownies without coconut milk?
Full-fat canned coconut milk gives the batter body and a subtle richness. For a dairy-based alternative, use the same volume of whole milk or evaporated milk; the coconut aroma will be absent and the result may be a little less rich. Avoid thin, low-fat plant milk unless necessary, since it can make the center less tender.
Why did my mochi brownies turn out hard?
Common causes include measuring too much flour, baking longer than needed, or cutting before the slab has cooled and interpreting its warm texture as a problem. Weighing the flour, using the specified pan size, and checking the center temperature near the end of baking help prevent overbaking. Store cooled pieces airtight so their edges do not dry out.
Can I bake the batter in a smaller pan?
A smaller pan makes the batter deeper, so the middle takes longer to cook and the edges may overbake before it is ready. For the times and doneness checks here, use a 9-by-13-inch pan. If you choose another size, fill it only partway, expect the baking time to change, and use a thermometer to check the center rather than relying on the listed time.
Can I make the batter ahead?
It is best to bake the batter soon after mixing. Once wet ingredients meet the baking powder, letting the mixture sit can affect how evenly it bakes, and the rice flour may thicken as it absorbs liquid. Instead, bake the brownies, cool them completely, and store or freeze the finished squares until you are ready to serve.
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