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Watermelon Cosmo in a classic martini glass - square

Watermelon Cosmo Cocktail

This watermelon cosmo is so refreshing and easy to make. It is perfectly sweetened and a delicious addition to your cocktail rotation.
Course Cocktails
Cuisine Cocktails
Keyword cosmo, watermelon cosmo
Prep Time 5 minutes
Total Time 5 minutes
Servings 2 Cocktails
Calories 241kcal


What's in this?

  • 4 ounces watermelon vodka
  • 1.5 ounces Cointreau (or triple sec)
  • 1.5 ounces lime juice (freshly squeezed)
  • 1.5 ounces cranberry juice (unsweetened)


  • 6 chunks watermelon


Make it Don't Break it

  • Fill cocktail shaker halfway with ice and place 3 watermelon chunks on each martini pick
  • Add vodka, Cointreau, lime juice, cranberry juice and simple syrup
  • Cover shaker and shake for 15 seconds
  • Strain and divide between the two martini glasses
  • Place watermelon chunks in glass
  • Sip
  • Smile
  • Enjoy


Helpful Tips:
  • Originally, I made this cocktail with a popular, pre-sweetened brand of cranberry juice, BUT... now I use a natural non-sweetened juice, so if you use the popular brand, your drink will not be as dark as the one I make here. It is because the juice I use is a more robust, purer juice. I'll keep the photo of my original watermelon cosmo at the bottom of this post so you can see what to expect.
  • If you opt to use pre-sweetened cranberry juice, OMIT the simple syrup as it would make it too sweet.
  • If you don't want to infuse your own vodka, you can usually find different brands that make a watermelon vodka like Veil, Skyy and Smirnoff in the liquor store.
  • Although the vodka in the old photo below is pinkish, if you infuse your own vodka, you won't always get that result. The vodka I infused for the new photos has a different tinge. Don't be alarmed, it all tastes delicious.
  • If you are just washing a few limes, use a natural, unscented hand soap and rub your hands with the soap over the fruit. Run cold water over the limes as you use a vegetable brush on the skin.
  • Make your own simple syrup as it is easy. Here's how:  measure equal parts of water and white sugar and place in a sauce pan, turn the heat on medium and bring the mixture to a boil, stir, then lower to a simmer for 5 minutes. Cool completely before using.


Serving: 1cocktail | Calories: 241kcal | Carbohydrates: 19g | Protein: 1g | Fat: 1g | Saturated Fat: 1g | Sodium: 9mg | Potassium: 25mg | Sugar: 18g | Vitamin C: 8mg | Iron: 1mg