Eternally Grapefruit:  Alcohol-Free Grapefruit Tonic

Bright, bold and beautiful.  This delicious alcohol-free grapefruit tonic is made with three simple ingredients: grapefruit, tonic water, and rosemary.

It’s refreshingly light and zesty, elevated to the next level of refinement with the infusion of savory and pungent rosemary.

Effortless and elegant, this mocktail is a reminder that the best things in life needn’t be complicated.


  • 1 oz. (30 ml) freshly squeezed red grapefruit juice (approx. ¼ grapefruit)
  • 5 oz. (150 ml) tonic water
  • 3-4 slices of red grapefruit
  • Sprig of rosemary
  • Ice


  • Jigger or measuring spoons
  • Knife
  • Citrus juicer
  • Muddler (optional)
  • Cocktail spoon
  • Stemmed gin and tonic glass


  1. Into the glass, add the grapefruit slices, grapefruit juice, rosemary, and ice.
  2. Top with tonic water.
  3. Use a cocktail spoon to gently mix the ingredients together.

Tip: To enhance the herbal aroma of the rosemary, gently hit the sprig on the back of your hand before adding it to the drink.  For a more pronounced rosemary flavor, use a muddler to lightly crush the herb into the grapefruit juice prior to adding the ice and tonic water.  This will extract more of the rosemary’s natural oils resulting in a more robustly flavored drink.

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Alcohol-Free Grapefruit Tonic FAQ

Can I use another type of grapefruit for this recipe?
Yes.  As an alternative to red grapefruit, you could use white or pink grapefruit instead.  Typically, red grapefruit is the sweetest of the three varieties, with pink grapefruit being less sweet and white grapefruit being the most tart or sour in flavor.

Can I make this recipe in advance?
If you want to get ahead, you can prepare the grapefruit slices and grapefruit juice in advance and store them in the fridge until you are ready to make the drink.  You will want to mix the drink just before serving to keep the tonic cold and fizzy.

What kind of tonic water should I use?
You can use any brand of tonic water that you like.  This recipe calls for classic tonic water, but you could experiment with different flavored tonics too.

Can I use dried rosemary instead of fresh?
It’s not recommended to use dried rosemary in this mocktail.  The best aromatics will come from a fresh sprig of rosemary.  

Do I need to use a specific type of glass?
This recipe specifies that the grapefruit tonic should be served in a stemmed gin and tonic glass.  However, you could use any type of glass that you prefer, including a highball or tumbler.

Can I substitute the grapefruit with another citrus fruit?
Yes, you could try using oranges, lemons, or limes as a variation on this mocktail.

Can I use a different herb instead of rosemary?
For a different flavor profile, you could experiment with different herbs instead of rosemary.  You could try using thyme, basil, or mint as an alternative.

Can I add sugar or sweetener to this recipe?
I find that the sweet red grapefruit and tonic water is usually sweet enough.  However, you could use your sweetener of choice (agave syrup, simple syrup, honey, etc.) if you prefer a sweeter drink.

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

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