Frozen Watermelon Cocktail

Watermelon is the dominant flavor in this frozen rum and watermelon cocktail, with a subtle hint of mint shining through. Making simple syrup is easy, plus, having leftover mint syrup on hand is nice for whipping up extra cocktails.

Frozen Watermelon Cocktail (Watermelon Mojito)
Photo: Victor Protasio
Active Time:
10 mins
Freeze Time:
2 hrs
Total Time:
3 hrs 45 mins


  • 2 cups seeded, cubed watermelon

  • ½ cup water

  • ½ cup granulated sugar

  • 12 fresh mint leaves, plus more for garnish

  • 1 cup ice

  • 3 ounces light rum (6 tablespoons)

  • ¼ cup fresh lime juice (from 2 limes), plus wedges for garnish

  • 3 dashes Angostura bitters


  1. Arrange watermelon evenly on a baking sheet lined with parchment paper. Freeze until completely frozen, at least 2 hours or up to 12 hours.

  2. Bring water and sugar to a simmer in a small saucepan over medium heat. Simmer, stirring occasionally, until the sugar has dissolved, about 2 minutes. Remove from heat and stir in mint. Let stand at room temperature, uncovered, for about 30 minutes. Pour the syrup through a fine-mesh strainer into a small airtight container. Cover and refrigerate for at least 1 hour (or for up to 2 weeks).

  3. Transfer the frozen watermelon to a blender. Add ice, rum, lime juice, bitters and 1/4 cup of the chilled mint syrup. Process until smooth, about 30 seconds. Divide between 2 glasses; garnish with additional mint and/or lime wedges, if desired. Serve immediately.

To make ahead

Mint syrup (Step 2) can be refrigerated in an airtight container for up to 2 weeks.


Parchment paper

Nutrition Facts (per serving)

216 Calories
31g Carbs
1g Protein
Nutrition Facts
Servings Per Recipe 2
Calories 216
% Daily Value *
Total Carbohydrate 31g 11%
Dietary Fiber 1g 4%
Total Sugars 27g
Protein 1g 2%
Vitamin A 880IU 18%
Sodium 5mg 0%

Nutrition information is calculated by a registered dietitian using an ingredient database but should be considered an estimate.

* Daily Values (DVs) are the recommended amounts of nutrients to consume each day. Percent Daily Value (%DV) found on nutrition labels tells you how much a serving of a particular food or recipe contributes to each of those total recommended amounts. Per the Food and Drug Administration (FDA), the daily value is based on a standard 2,000 calorie diet. Depending on your calorie needs or if you have a health condition, you may need more or less of particular nutrients. (For example, it’s recommended that people following a heart-healthy diet eat less sodium on a daily basis compared to those following a standard diet.)

(-) Information is not currently available for this nutrient. If you are following a special diet for medical reasons, be sure to consult with your primary care provider or a registered dietitian to better understand your personal nutrition needs.

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