
This naturally dye-free watermelon mochi brings the fresh taste of summer into a delightfully chewy Japanese-inspired treat. The natural pink hue comes solely from watermelon juice, making this a wholesome alternative to artificially colored desserts while maintaining that signature mochi texture everyone loves.
I first made these watermelon mochi squares during a sweltering August afternoon when my family was craving something sweet yet refreshing. The natural watermelon flavor paired with the uniquely chewy texture became an instant hit at our backyard gatherings.
Ingredients
- Glutinous rice flour: provides that signature stretchy mochi texture despite containing no gluten
- Maple sugar: offers a natural sweetness that complements the watermelon without overpowering it
- Tapioca starch: helps create the perfect soft yet stable consistency
- Fresh watermelon juice: brings authentic flavor and natural coloring look for the ripest watermelon for best results
- Avocado oil: prevents sticking and adds subtle richness choose a neutral-flavored high-quality oil
Step-by-Step Instructions
- Prepare the watermelon juice:
- Blend fresh watermelon chunks in a high-powered blender until completely liquefied. Strain carefully through a fine mesh sieve to remove all seeds and pulp. The clearer your juice, the more vibrant your final mochi color will be. Measure exactly 3/4 cup for consistent results.
- Combine dry ingredients:
- Whisk together glutinous rice flour, maple sugar, and tapioca starch in a large bowl until evenly distributed. Creating a well-mixed dry base ensures your mochi will have consistent sweetness and texture throughout.
- Form the wet mixture:
- Create a well in the center of your dry ingredients and pour in the strained watermelon juice and 1 tablespoon of avocado oil. Whisk thoroughly until no dry spots remain. The mixture will appear thin at this stage but will thicken considerably during cooking.
- Cook the mochi:
- Heat your remaining tablespoon of avocado oil in a large non-stick pan over low-medium heat. Pour in the mochi mixture and stir continuously for 3-4 minutes as it transforms. Watch for the color change from light pink to a deeper pinkish-orangeish hue as it thickens dramatically into a cohesive dough.
- Shape the mochi:
- Using slightly oiled hands to prevent sticking, transfer the hot mochi to a piece of parchment paper. Use the paper to gently fold and press the mochi into a square shape. The parchment prevents sticking while allowing you to handle the still-hot dough safely.
- Cool completely:
- Transfer the shaped mochi still on its parchment to a small square container. Cover with a lid to maintain moisture while it cools and sets in the refrigerator for 1-2 hours. This resting period allows the mochi to firm up enough for clean cutting.
- Cut into squares:
- Dust both sides of the cooled mochi block with additional glutinous rice flour before cutting with an oiled knife into 20 equal pieces. Coat all sides of each cube with more rice flour to prevent sticking. Serve immediately for the best texture experience.

The watermelon juice is truly the star ingredient in this recipe. The first time I made these for my niece who has multiple food sensitivities, her eyes lit up at the sight of the naturally pink treats. Now its our special summer tradition whenever she visits, and we often experiment with different seasonal fruits.
Perfecting The Texture
The continuous stirring during the cooking phase is absolutely critical for proper mochi texture. As you stir, youll notice the mixture transform before your eyes from a thin liquid to a thick, sticky mass. This gelatinization process is what gives mochi its characteristic chewiness. If you stop stirring even briefly, you risk uneven cooking and textural inconsistencies throughout your final product.
Storage Tips
These mochi squares are best enjoyed within 48 hours of making them. Store in an airtight container with a secure lid rather than just plastic wrap to prevent them from drying out and hardening. If they do firm up slightly, you can microwave them for 5-10 seconds to restore some of their softness before serving. The natural ingredients mean these treats wont have the extended shelf life of commercially prepared mochi.
Flavor Variations
While watermelon creates a lovely summer treat, this basic recipe works beautifully with other fruit juices too. Try substituting freshly squeezed strawberry juice for a deeper pink color, or mango juice for a tropical yellow version. Just ensure your substituted juice maintains the same 3/4 cup measurement for proper consistency. For an extra dimension of flavor, consider adding 1/4 teaspoon of complementary extract like vanilla or almond to enhance the natural fruit notes.
Recipe FAQs
- → Why does my mochi mixture need continuous stirring?
Continuous stirring ensures even heat distribution and prevents the mochi from sticking too much to the pan. It's crucial for achieving the proper transformation into a smooth, sticky dough with even coloring throughout.
- → Can I use another sweetener instead of maple sugar?
Yes, you can substitute maple sugar with other natural sweeteners like coconut sugar or honey, though liquid sweeteners may require adjusting the flour ratio slightly to maintain the proper consistency.
- → Why does my mochi harden after a couple of days?
Mochi naturally hardens as moisture evaporates. Storing in an airtight container in the refrigerator helps slow this process, but traditional mochi is best enjoyed within 1-2 days for optimal texture and softness.
- → Can I use bottled watermelon juice instead of fresh?
Fresh watermelon juice is recommended for the best flavor and natural color. Bottled juice often contains preservatives or added sugars that may affect the taste and texture of the final product.
- → How can I get a more vibrant pink color naturally?
For a more vibrant pink color, select watermelon with deep red flesh and reduce the juice slightly before using to concentrate both the color and flavor. Avoid watermelon with pale flesh as it will yield less vibrant results.
- → What's the difference between glutinous rice flour and regular rice flour?
Glutinous rice flour (also called sweet rice flour) contains high amounts of amylopectin which gives mochi its characteristic chewy, sticky texture. Regular rice flour would result in a completely different, less elastic texture and isn't suitable for mochi making.