Melancholy Fix: Watermelon Cooler

When the temperature starts to rise, reach for this fresh and fruity watermelon cooler to help you chill out and chill down.

The subtle sweetness of the watermelon pairs beautifully with the fresh zing of lime and cool, green mint.  The combination is pure, light and rejuvenating.

The coconut water is a great way to pack in some additional nutrients while rounding out the mouthfeel of the mocktail.  That being said, you can always substitute still or sparkling water if you prefer.

The watermelon cooler is perfect for breakfast, lunch and afternoon refreshment but lacks the flavor ‘oomph’ to rival bolder pre-dinner drinks.  This one is for quaffing and not sipping.


  • 3 oz. (90 ml) watermelon juice (approx. 120 g of fresh watermelon)
  • ½ oz. (15 ml) freshly squeezed lime juice (approx. 1 lime)
  • ¼ oz. (7.5 ml) agave syrup
  • 10 mint leaves, finely sliced
  • 3 oz. (90 ml) coconut water

To garnish:

  • Slice of watermelon
  • Sprig of mint


  • Immersion hand blender
  • Fine mesh sieve
  • Citrus juicer
  • Jigger or measuring spoons
  • Muddler
  • Shaker
  • Double rocks glass (or tumbler)


  1. First, make the watermelon juice.
  2. Use an immersion hand blender to liquidize the watermelon.
  3. Pass the mixture through a fine mesh sieve to remove any solids from the juice.
  4. Next, assemble the mocktail.
  5. In a cocktail shaker, muddle the mint with the lime juice and agave syrup.
  6. Add the watermelon juice and a handful of ice.
  7. Shake vigorously for 15-20 seconds until the outside of the shaker is very cold.
  8. Strain into a double rocks glass filled with ice.
  9. Top with coconut water.
  10. Garnish with a sprig of mint and a slice of watermelon.

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Watermelon Cooler FAQ

What type of watermelon should I use for this recipe?
You can use any type of watermelon for this recipe, as long as it’s ripe and sweet.  Look for watermelons that are firm, heavy for their size, and sound hollow when tapped.  Avoid fruit that have soft spots, cracks or bruises.  Seedless watermelons are best, as they are easier to work with and produce a smoother juice, but seeded watermelons can also be used if the seeds are removed before blending.

Do I need to remove the seeds from the watermelon before liquidizing the fruit?
If you are using a seeded watermelon, it’s recommended to remove the seeds before blending it into a juice.  The seeds can affect the texture and taste of the juice, and may also damage the immersion blender.  To remove the seeds, cut the watermelon into small pieces and use a spoon or a melon baller to scoop out the seeds.

What is muddling?
Muddling is a technique used to release the flavors and oils from fresh herbs and fruits.  It involved gently pressing the ingredients against the bottom of a cocktail shaker or glass with a muddler.

Can I use a different sweetener instead of agave syrup?
Yes, you can use any sweetener that you like.  Some good substitutes for agave syrup are honey, maple syrup, or simple syrup (1:1 parts water and sugar). 

Is it necessary to shake the Watermelon Cooler?
Shaking the Watermelon Cooler helps to mix the ingredients together and bring down the temperature of the liquid quickly.  It is recommended but not necessary to do this step.

What is a double rocks glass?
A double rocks glass is a short and sturdy glass with a wide mouth and thick bottom.  It’s typically used for serving drinks on the rocks or neat.  It works well for the serving size of this mocktail too.

Can I use dried mint instead of fresh mint?
Fresh mint will impart the best flavor to the mocktail.  Dried mint can be used at a pinch, but the taste and aroma may be less intense.  Start by substituting a teaspoon of dried mint and adjust to your taste.

Can I make a large batch of Watermelon Cooler for a party?
Yes, you can scale up the recipe to make a larger batch.  Simply multiply the ingredients by the number of servings that you want to make. Skip the shaker, and mix everything in a large pitcher or punch bowl.  When you are ready to serve, pour the drink into glasses filled with ice and a few mint leaves.

Did you make this?  Tag me @mightymocktail or use the hashtag #mightymocktail!

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