Inside-a-Watermelon Mojitos

Yield: 8 Servings
Total Time:
20 mins
Because every watermelon will be different in size and sweetness, the ingredients are to taste, so add as much as you like based on your personal taste preference. Use the recipe as a general guideline and taste as you go. It is a tough job but someone has to do it.
Chilling the watermelon the night before will give you a quick chill on the margaritas.
A watermelon about 10-12 pound will be a good size that will allow the beater blades from the hand mixer to reach all the way through and around the inside of the watermelon. If your watermelon is any larger, you might need to use an immersion blender with a longer reach or use the drill and coat hanger method. Watch the video on our blog write up to see how we made these.


  • 1 seedless , ripe watermelon (about 10-12 pounds (4.5-5.5 kg). Anything larger, the beater blades won't reach inside to blend much of the watermelon)
  • 20-30 fresh mint leaves
  • 3/4 cup (180ml) rum (or to taste)
  • 1/3 cup (80ml) fresh lime juice, about 3 limes (or to taste)
  • 1/4 cup (60ml) simple syrup (see Notes below)
  • club soda , to top off each cocktail
  • lime slices for garnish (optional)
  • ice
  • one 6-8 ounce paper or plastic cup
  • optional , fresh mint and/or limes wedges for garnish


  1. Muddle or chop the mint leaves and set aside.
  2. Carefully cut a hole in the watermelon large enough to fit your beater blade. Push the blade into the watermelon hole and slowly blend the watermelon interior into juice. Make sure to scrape all the way to the sides and bottom of the watermelon to maximize juice.
  3. Ladle out about 1 cup of watermelon juice to make room for the rest of the liquid ingredients. You can reserve the 1 cup of removed juice and make a separate mojitos later.
  4. Add the muddled/chopped mint leaves, rum, lime juice, and simple syrup to the watermelon.  Mix with the beater blade to evenly combine the ingredients.
  5. Cut out the bottom of a paper/plastic cup.  Cut out a section of the cup so it fits into the watermelon hole to use as a spout to pour. If necessary, round out the hole in the watermelon so the cup fits smoothly against the edges and insert the cup into the watermelon hole.

Two options for serving:

  1. Pour the blended watermelon mojitos into a jug and then serve from the jug (less messy - the watermelon can be a bit cumbersome to pour into individual glasses).
  2. Pour directly from the watermelon into the individual cups (more fun, but dribbles and splatters will often happen).
  3. Pour the watermelon mojito into ice filled cups about 3/4's full. Top with club soda and gently stir. Garnish with mint and/or lime wedges.

Recipe Notes

Simple Syrup Recipe

Basically equal parts water and sugar dissolved together. We'll usually make a bigger batch and use as needed.
  • 2 cups (480ml) Water
  • 2 cups (400g) Sugar
  1. Combine water and sugar in a medium saucepan. Heat until sugar is completely dissolved. Set aside to cool. After cool, store in refrigerator until ready to use.

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