Watermelon Balls with Lime and Mint Simple Syrup

Juicy watermelon balls soaked in fresh lime and a mint simple syrup. Just four ingredients, easy to make ahead, with the option to spike with vodka, rum, or tequila for a summer party.

Watermelon balls are one of the easiest ways to turn a plain watermelon into something that feels like a party. Scoop the fruit with a melon baller, then let it soak in fresh lime zest, lime juice, and a homemade mint simple syrup. Lime and mint are the same pairing you find in a mojito, and they make the watermelon taste even brighter.

The whole recipe takes four ingredients and about 15 minutes of hands-on time. It also gets better as it sits, so you can make it hours ahead for a cookout. Add a splash of vodka, rum, or tequila to make spiked watermelon balls for the grown-ups.

Recipe at a Glance

What it is: A chilled fruit salad of watermelon balls soaked in lime and fresh mint simple syrup.

Why it works: The mint steeps off the heat so it tastes fresh, not cooked, and you sweeten after tasting the fruit, so it never ends up too sugary.

Time: 15 minutes prep, plus at least 30 minutes chilling.

Make-ahead: The mint syrup keeps up to 5 days in the fridge. The soaked watermelon balls keep up to 1 day before they turn soft.

Serve with: Skewers in wine glasses for parties, or alongside cookout sides like grilled Mexican street corn and spicy Asian cucumber salad, with a pitcher of chia fresca.

Spiked option: Add 2 tablespoons vodka, rum, or tequila, to taste.

Key swaps: Cantaloupe or honeydew for the watermelon; basil for the mint.

Ingredients for Watermelon Balls

• Seedless watermelon: About 4 to 5 cups of watermelon balls, which is roughly one personal-sized watermelon. A regular-sized watermelon works too, and its slightly softer flesh is easier to scoop.
• Lime: You’ll use both the zest and the juice of half a lime for brightness.
• Sugar and water: Equal parts for the simple syrup.
• Fresh mint: Two sprigs, steeped in the syrup.
• Optional alcohol: Vodka for spiked watermelon balls, or swap in rum or tequila.

See the recipe card below for exact amounts.

How to Make Watermelon Balls

1. Make the mint simple syrup first. Add equal parts sugar and water to a small saucepan and heat until the sugar dissolves and the syrup simmers. Start here because the syrup needs time to cool while you prep the fruit.

2. Steep the mint off the heat. Take the pan off the stove, add the mint, and cover it. Let the mint steep until the syrup cools, then remove the mint. Keeping the mint out of the simmering syrup keeps its flavor fresh instead of cooked.

3. Scoop the watermelon. While the syrup cools, use a melon baller to scoop the watermelon flesh into a large bowl. Short on time? Cut it into cubes instead.

4. Add the lime and optional alcohol. Add the lime zest and lime juice to the bowl. For spiked watermelon balls, add the vodka, rum, or tequila now so the fruit soaks it up as it chills.

5. Taste, then sweeten. Taste a watermelon ball before adding syrup. Start with 2 tablespoons of mint simple syrup and add more until you reach your preferred sweetness. The fruit is already sweet, so go slowly.

6. Chill and soak. Refrigerate for at least 30 minutes and up to 1 day. The longer it soaks, the more flavor the watermelon absorbs, but beyond a day the texture turns too soft.

7. Adjust and serve. The watermelon releases juice as it chills, which dilutes the dressing. Taste again and add more syrup or alcohol if needed. Serve cold in wine glasses with skewers, garnished with a sprig of mint and a slice of lime.

The watermelon and lime pairing also fits a no-cook summer menu with chilled cucumber avocado soup.

Variations and Substitutions

• Spiked watermelon balls: Add vodka, rum, or tequila along with the lime. Start with 2 tablespoons per batch and adjust to taste.
• Watermelon mojito: Add a splash of soda water to turn it into a drinkable watermelon mojito. Find more ideas in my drink recipes.
• Other fruit: Cantaloupe, honeydew, strawberries, apples, or pears all work. Pick fruit that doesn’t bruise easily.
• Other herbs: Swap the mint for basil, thyme, or rosemary in the syrup.
• Other infused syrups: Steep citrus peel, cinnamon, vanilla, lavender, ginger, or lemongrass in the syrup instead of herbs.

If you like fruit desserts with a light touch, try my zabaglione over strawberries or a spoonful of blueberry compote.

Make-Ahead and Storage

Mint simple syrup: Store in a sealed jar in the fridge for up to 5 days. Discard it if it turns cloudy or changes color.

Watermelon balls: Soak them in the fridge for up to 1 day. After that, the watermelon gets too soft, so this is a same-day or next-day recipe.

Frequently Asked Questions

If you make these watermelon balls, leave a rating and a comment below. I’d love to hear how they turned out! For more recipes, subscribe to my newsletter or follow along on Pinterest.

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