2-Ingredient Watermelon Jelly (No-Bake, Vegan Dessert!)

As summer reaches its peak, few treats capture the season’s essence like this cool and refreshing watermelon jelly. This watermelon jelly, known as gelo di melone, was once a cherished dessert served during Ferragosto and summer celebrations in Sicily. It’s a simple blend of pureed watermelon and a gelling agent, set inside the hollowed rind to create a stunning, natural presentation.

This version combines the vibrant freshness of watermelon with the clean-setting power of agar agar, resulting in a light, fruity confection that’s both easy to prepare and elegant to serve.

You can serve this dish during a backyard gathering or if you are seeking a make-ahead dessert to cool off with. Do feel free to brighten it further with a hint of lemon zest, juice, or adjust sweetness to your preference.

What is Watermelon Jelly?

Watermelon jelly is a beautifully simple, lightly sweetened jelly made from fresh watermelon juice and set with agar agar, a seaweed-based gelling agent. It’s served in the hollowed-out rind of the watermelon itself, which doubles as a natural mold and the coolest edible bowl ever.

While this might sound like a modern Instagrammable trend, fruit-based jellies have a long culinary history, particularly in East and Southeast Asia. This watermelon version combines the visual whimsy of a party trick with the simplicity of a minimalist dessert, and is similar to Japanese mizu shingen mochi, which is raindrop cake.

Pro Tips for the Best Watermelon Jelly

• Use a seedless watermelon for ease. If not, strain the juice well to avoid unpleasant bits in the jelly.
• Don’t boil the juice too hard, but simmer gently to preserve that fresh watermelon flavor.
• If you want it sweeter, just add sugar, honey, or agave while the juice heats. Start small, as you don’t need much.
• A splash of lemon juice or a bit of lemon zest adds brightness and makes the flavor pop.

Frequently Asked Questions

How long does watermelon jelly take to set?

Watermelon jelly made with agar agar sets in just about 2–3 hours in the fridge. You’ll know it’s ready when it’s firm to the touch and jiggles like a confident belly dancer.

Can I use gelatin instead of agar agar?

Yes, but agar agar sets more firmly, doesn’t melt at room temperature like gelatin, and it’s also vegan. If you do swap, you'll need to adjust the quantity since agar is much more potent.

Can I flavor it with other things?

A few mint leaves steeped in the warm juice, a touch of rosewater, or citrus zest can add layers of flavor. Just don’t overwhelm the watermelon, because it’s the star.

How to Store Watermelon Jelly

Keep your watermelon jelly covered in the fridge for up to 2–3 days. Because it’s made from fresh fruit, it’s best enjoyed while still vibrant and juicy. Avoid leaving it out at room temperature for too long, although agar holds well, the fruit flavor can dull. However, don’t freeze it because it alters the texture of agar-based jellies and can make them rubbery or weep liquid when thawed.

How to Make 2-Ingredient Watermelon Jelly

Grab a baby watermelon, cut it in half, and use a spoon to scoop out the juicy red pulp.

Toss the pulp into a blender and blitz until smooth. Strain the puree through a sieve to remove any seeds or fibrous bits.

Pour the watermelon juice into a saucepan. Sprinkle in the agar agar and stir well to combine. Heat over medium, bring to a gentle simmer, and cook for 3 minutes.

Carefully pour the hot mixture into one half of the hollowed-out watermelon rind. Place it in the fridge and let it chill for at least 2–3 hours or until fully set.

Once set, slice into wedges, just like you would with real watermelon and dive in.