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Grapefruit Gin Fizz

This grapefruit gin fizz takes herbaceous gin, bubbly seltzer, and fresh grapefruit to make the most refreshing drink of the summer.

Grapefruit Gin Fizz in a glass garnished with fresh grapefruit.

It gets pretty hot and humid down here in the South during the summertime, and nothing hits the spot better than a cold and refreshing drink.

This grapefruit gin fizz is the perfect cocktail to quench your thirst, by using beautifully botanical gin, tart and dry grapefruit juice, effervescent seltzer, and a bit of agave, you’ve crafted the perfect cocktail for summer.

Making your own cocktails allows you to adjust the levels of alcohol and sweetness to your and your guest’s liking!

When the summer nights get long and hot, you’ll definitely want to cool down with this grapefruit gin fizz.

Ingredients to make Grapefruit Gin Fizz sitting on a table.

Ingredients for grapefruit gin fizz

  • Gin – This is the only spirit in this drink and has a lovely green, herbaceous flavor. 
  • Grapefruit juice – Be sure to use 100% grapefruit juice and not a sugary concentrate for the best and brightest grapefruit flavor!
  • Seltzer water/club soda – This will add effervescence to our drink.
  • Agave syrup – Agave syrup will add a slight sweetness to help balance the tangy and tart flavors. 
Pouring grapefruit juice into a cocktail glass.
Pouring gin into a cocktail glass.

What is the difference between seltzer and club soda?

Seltzer is simply carbonated water that does not contain any minerals. It’s very clean tasting, and is a blank canvas for all types of flavorings you could add to it.

Club soda is carbonated water that includes minerals (like potassium bicarbonate and potassium sulfate). The minerals give it a slightly salty flavor.

Sometimes it’s hard to tell the difference, and they can absolutely be used interchangeably in this grapefruit gin fizz.

It all comes down to your preference, or what you happen to have on hand!

Grapefruit Gin Fizz garnished with an edible flour.

What is gin made from?

Gin is a clear spirit that is distilled from malt or grain and is always infused with juniper berries and then sometimes other botanicals – such as licorice, citrus, or cinnamon… the list goes on and on!

Different brands of gin have their own unique flavor from their own unique blend of botanicals, so feel free to use your favorite brand. 

Making cucumber flavor gin (optional)

If you want to add even more flavor to this cocktail you can add fresh cucumber to your gin and store it in the refrigerator for up to 24 hours.

Then simply remove the cucumber and you’ll be rewarded with fresh cucumber gin.

Grapefruit Gin Fizz in a tall cocktail glass.

What is agave syrup?

Agave syrup is a sweetener made from the agave plant. 

It has become widely available across the US and is found in grocery stores right next to the sugar!

It’s also available online.

It’s about 1.5 times sweeter than white sugar, so you can get away with using less.

Grapefruit Gin Fizz served with sliced grapefruit.

Storage and leftovers

These grapefruit gin fizzes are best consumed after they’re made.

So, unfortunately, no leftovers here!

Grapefruit Gin Fizz in a tall cocktail glass.

More cocktail recipes

Grapefruit Gin Fizz

Author: Brandy O’Neill – Nutmeg Nanny
This grapefruit gin fizz takes herbaceous gin, bubbly seltzer, and fresh grapefruit to make the most refreshing drink of the summer.
5 from 4 votes
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Prep Time 5 minutes
Total Time 5 minutes


  • 3 ounces grapefruit juice
  • 1 tablespoon agave syrup
  • 2 ounces gin
  • 2 ounce seltzer water
  • Grapefruit slices for garnish, optional


  • In a tall cocktail glass add grapefruit juice and agave. Stir to combine.
  • Add ice to the glass and pour in gin and seltzer water.
  • Gently stir and garnish with fresh grapefruit slices if desired.


Serving: 1g | Calories: 270kcal | Carbohydrates: 35g | Protein: 1g | Sodium: 3mg | Fiber: 2g | Sugar: 20g
Course Drinks
Cuisine American
Keyword cucumber cocktail, cucumber gin, cucumber grapefruit cocktail, gin cocktails, gin fizz, grapefruit cocktails
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Grapefruit Gin Fizz pin for Pinterest.

About Brandy!

I am a food lover and recipe developer bringing you delicious recipes that taste great and are easy to make! My food is inspired by travels around the world and my love of flavorful food. A list of things that make me happy: cats, Coke Zero, houseplants, and travel. Read more...

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