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Frozen Watermelon Mojito

Beat the heat with a frozen watermelon mojito loaded with the flavors of watermelon, mint, lime, rum, and blended with ice for a frozen, slushie texture that’s perfect for barbecues, cookouts, or lounging by the pool.

Although I love all the seasons – I can find something great about each and every one of them – summer is my favorite. After several months of cold, gray New York winter, there’s nothing like enjoying the outside with family and friends. Summer is a time for breaking out the grill, slathering everything with BBQ sauce and enjoying time with family and friends, and cooling off with a fantastic cocktail or two while soaking up every minute of food, friends, and sunshine. AND on a really hot day, the thing I love to serve the most is this frozen watermelon mojito.

Frozen Watermelon Mojito

This delicious cocktail combines fresh, sweet watermelon juice with lime juice, simply syrup for even more sweetness, seltzer for a fizzy blast, and white rum for that boozy kick, and of course fresh mint leaves. I blend it all together to create what amounts to a boozy watermelon slushie that’s strong enough to keep the party fun but not so strong that you end up with a lampshade on your head! It’s perfect for everything from big backyard bashes to sipping while you lounge by the pool. It’s just perfect, period!

Why You’ll Love This Recipe

  • It only uses simple ingredients that you can find almost anywhere.
  • It’s full of the flavors of summer.
  • It’s light and refreshing, and it’s not overly boozy.
  • It’s great for any kind of summer get-together.
  • You can leave out the alcohol for a fun, frozen treat for everyone!

Ingredients

This recipe uses a few ingredients that should be no problem to find. Even the rum should be available at your local grocery store, and if not, any liquor store will have what you need.

Yields: 2 to 3 mojitos

  • 2 1/2 cups frozen watermelon cut into cubes or chunks
  • 1/2 cup white rum
  • 1/3 cup fresh squeezed lime juice
  • 1/2 cup granulated sugar or for sugar free, use your favorite brand that dissolves well
  • 1/2 cup cold water
  • 1/2 cup seltzer, plain or lime chilled
  • 2 mint sprigs
  • lime wedges, watermelon slices, and mint for garnish, this is optional
  • full printable recipe is below in the recipe card

Instructions

You’ll want to plan ahead so you can have time to freeze the watermelon. (About 2 hours)

Step 1:

Cut watermelon into small to medium chunks or cubes. Lay single layer on a rimmed cookie sheet. Place in freezer until frozen. This should take about 2 hours.

Step 2:

While the watermelon is freezing, make your simple syrup. Bring the sugar and water to a boil in a small saucepan over medium to high heat.  Add the mint sprigs, reduce the heat to low, and simmer for 5 minutes. Let the mixture come to a boil.  Remove the syrup from the heat, and let cool 30 minutes on the stove top. Remove and discard the mint sprigs. Chill syrup in fridge for about 30 minutes or until it’s cooled completely. **Please note below for store bought simple syrup**

Step 3:

In a blender, combine the frozen watermelon, simple syrup, rum and lime juice. Blend until smooth. About 10 seconds should be right. Pour in the seltzer. Blend for just a second or two to combine. Divide the mixture evenly into glasses. (Chilled glasses is a great idea. Just place glasses in fridge a half hour before serving) Garnish each with a watermelon wedge, lime wedge and mint sprig, optional.

Substitutions and Variations

  • For something a little different, try using lemon-lime soda in place of seltzer.
  • If you don’t have fresh limes, you can use Real Lime juice.
  • **If you don’t want to make your own simple syrup, you can buy at most well stocked markets or online here The only thing you would do for the recipe is add the fresh mint into the blender when combining all the other ingredients. Use about 1/4 cup of prepared simple syrup.

Equipment

  • Measuring cups
  • Blender, this one is fabulous!

Tips

  • Use a good blender that can handle crushing up all that frozen watermelon.
  • Have fun! This recipe is too easy to even need tips.

Storage

Store these in your belly! Seriously, once they melt, they’re not the same, and you can never get quite the same texture by refreezing them.  This recipe makes 3 to 4 drinks.

What to Serve with Frozen Watermelon Mojitos

This delicious adult slushie is fantastic all on its own while you sit in the shade. It’s also a great pairing with sweet treats for dessert or as a sweet kick of flavor while you enjoy steaks, dogs, burgers, chicken, or whatever you happen to be grilling. Some fun pairings include:

FAQ

What is a mojito?

A mojito is an alcoholic Cuban punch made with white rum, sugar, lime juice, soda water, and mint.

Can you add too much alcohol to a frozen mojito?

Technically, no. Adding more alcohol won’t affect the slush factor of the drink. However, adding more alcohol can affect the flavor balance as well as how much can be safely and responsibly consumed.

More Melon Recipes

If you love melon recipes of all kinds, I have three more here that I think you’re going to enjoy.

Print and copy full recipe below in the recipe card

Frozen Watermelon Mojito

Beat the heat with a frozen watermelon mojito loaded with the flavors of watermelon, mint, lime, rum, and blended with ice for a frozen, slushie texture that’s perfect for barbecues, cookouts, or lounging by the pool. 

Course Appetizer, Before Dinner, Cocktail, Cocktail Hour
Cuisine American, Mexican, Southern, Tropical
Keyword Cocktail, Frozen Watermelon Mojito, Mojito, watermelon
Servings 3

Ingredients

  • 2 1/2 cups frozen watermelon cut into cubes or chunks
  • 1/2 cup white rum
  • 1/3 cup fresh squeezed lime juice
  • 1/2 cup granulated sugar or for sugar free, use your favorite brand that dissolves well Add more sugar after all is blended if you want it sweeter.
  • 1/2 cup cold water
  • 1/2 cup seltzer, plain or lime chilled
  • 2 mint sprigs
  • lime wedges, watermelon slices, and mint for garnish This is optional

Instructions

  1. NOTE: You’ll want to plan ahead so you can have time to freeze the watermelon. (About 2 hours) 

    1. Cut watermelon into small to medium chunks or cubes. Lay single layer on a rimmed cookie sheet. Place in freezer until frozen. This should take about 2 hours. 

    2.While the watermelon is freezing, make your simple syrup. Bring the sugar and water to a boil in a small saucepan over medium to high heat.  Add the mint sprigs, reduce the heat to low, and simmer for 5 minutes. Let the mixture come to a boil.  Remove the syrup from the heat, and let cool 30 minutes on the stove top. Remove and discard the mint sprigs.

    3. Chill syrup in fridge for about 30 minutes or until it’s cooled completely. 

    4. In a blender, combine the frozen watermelon, simple syrup, rum and lime juice. Blend until smooth. About 10 seconds should be right. Pour in the seltzer. Blend for just a second or two to combine. Divide the mixture evenly into glasses. (Chilled glasses are a great idea. Just place glasses in fridge a half hour before serving) Garnish each with a watermelon wedge, lime wedge and mint sprigs, this is optional. Enjoy!

    See above for where to buy ready made simple syrup..

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