Key Lime Martini

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Our Key Lime Martini is full of tropical flavors and only takes about 5 minutes to prepare. It’s the perfect blend of coconut and key lime with a touch of heavy cream.

This key lime martini is everything you want in a cocktail. It’s full of tropical flavors, smooth, and perfectly balanced. Some of our other favorite cocktails are this classic mojito, frozen daiquiri, a strawberry mojito, a painkiller drink, and raspberry martini.

Cocktail in martini glasses.

Key Lime Pie Martini

Creamy, fruit flavored cocktails are some of my absolute favorite things. I love to taste test them and pair them with fresh dishes. When we lived in Florida, John created this key lime martini. His version didn’t have heavy cream. I added that later to give it a little different feel.

Now that we aren’t living near a coast, this is one of my favorite cocktails. It’s packed full of all the tropical flavors we love, and it only takes a few minutes to prepare. This cocktail uses common ingredients, even the key lime juice is sold in some supermarkets.

How to Make a Key Lime Martini:

  1. Place the ice in a drink shaker.
  2. Pour in vodka, coconut rum, heavy cream, simple syrup, and key lime juice.
  3. Add the lid and swirl gently to combine.
  4. Serve in a chilled glass.
Collage showing how to make a key lime martini.

Key Lime Martini Tips and Variations:

  • We use bottled key lime juice for this martini. If you want to swap that out with lime juice, it will work. You’ll be making a lime martini as opposed to a key lime martini. It does taste slightly different.
  • I’ve made this cocktail with and without the heavy cream. There are a couple things to note when using heavy cream. Adding too much key lime juice can cause the cream to curdle, so be cautious of adding extra. When mixing the martini, swirl gently, DON’T SHAKE! Shaking will cause the heavy cream to stick to the ice and separate.
  • We use coconut rum for this recipe, but if you’d prefer a white or silver rum that will work great.
  • We use unflavored vodka, but lime, coconut, or whipped cream flavored vodka would be amazing. Pick your favorite or try something new.
  • The simple syrup is adjustable. Use more or less depending on sweet you want the cocktail.
  • Many key lime martinis have a graham cracker crumb rim. It’s super cute and a great option. I opted not to do that this time around, but if you wanted to add the garnish it’s really easy. Crush up some graham cracker crumbs or purchase a box of graham cracker crumbs. Dip the rims of the simple syrup or run a lime wedge around the rims. Dip the glasses into the graham cracker crumbs and chill the glasses while you prepare the cocktails. A lime slice and a bit of whipped cream are also a nice touch.
What can you use instead of heavy cream in a key lime martini?

Swap out the heavy cream with RumChata to make an amazing RumChata Key Lime Martini!

Key lime martini next to fresh key limes.

Storage Recommendations:

Room Temperature: A key lime martini should be served immediately after preparing. Storing at room temperature is not recommended.

Refrigerator: This cocktail can be prepared ahead of time and stored in the refrigerator for up to 1 hour. However, don’t add the heavy cream until you’re ready to serve the drink.

Freezer: We do not recommend freezing this drink.

Two key lime drinks with cream.

Key Lime Martini

4.7 from 3 votes
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Author: Kimberly
Prep Time: 5 minutes
Total Time: 5 minutes
Servings: 1 Serving



  • Place ice, vodka, coconut rum, heavy cream, simple syrup, and key lime juice into a drink shaker.
    ½ cup ice
    1 ounce vodka
    1 ounce coconut rum
    1 ounce heavy cream
    1 ounce simple syrup
    2 teaspoons key lime juice
  • Swirl gently to combine the ingredients.
  • Serve in a chilled glass.


Serving: 1drink | Calories: 306kcal | Carbohydrates: 22g | Protein: 1g | Fat: 10g | Saturated Fat: 7g | Polyunsaturated Fat: 0.5g | Monounsaturated Fat: 3g | Cholesterol: 32mg | Sodium: 31mg | Potassium: 57mg | Fiber: 0.04g | Sugar: 22g | Vitamin A: 422IU | Vitamin C: 3mg | Calcium: 27mg | Iron: 1mg


*The calories listed are an approximation based on the ingredients in the recipe card and a serving size of 1 (4 ounce) drink. Actual calories will vary.
*Tripling this recipe has not been tested. Therefore, we can not guarantee the outcome of adjusting the ingredients.
*For more information, tips, and answers to frequently asked questions, please refer to the post.
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  1. I just made these using key limes right off my brother’s tree in his back yard. I used Whipped (cream) vodka and it gave just a little creamy taste like in Key Lime Pie. Also, a little simple syrup since it was a tad too sour.

    1. Hi Beth!

      That’s awesome that you have access to fresh key limes! I bet those tasted amazing! Using the whipped cream vodka was a great idea, and that’s something I’ll try the next time I make this. This martini is a bit on the sour side, so a little simple syrup is the perfect addition. 🙂 Thanks so much for giving it a try. We hope you have a wonderful evening!

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