Grapefruit Tonic Syrup



  • Skin of 4 grapefruits, allowed to dry on the countertop overnight
  • Skin of 4 grapefruits, freshly peeled
  • 1 cup Fresh Grapefruit Juice
  • 2½ cups water
  • ½ cup Campari
  • ¼ cup Citric Acid
  • 10 green Cardamom Pods
  • 10 Allspice Berries
  • ⅛ cup chopped Lemongrass
  • ⅛ cup Cinchona Bark, sifted (no powder)
  • ⅛ cup Gentian Root, sifted (no powder)
  • ⅛ tsp. Pectic Enzyme (optional)*
  • Rich Simple Syrup (see instructions)

  • Add all ingredients (except the Rich Simple Syrup) to a large sauce pot and bring to a boil. Stir and reduce the heat to low. Cover and simmer for 30 minutes. Remove from the heat and let sit on the countertop overnight. The next morning, strain the liquid through a double layer of 90-grade cheese cloth, into a 4-cup measuring beaker (the yield, here, will be 2½-3 cups). Add an equal measure of Rich Simple Syrup (2 parts sugar: 1 part water, boiled to dissolve) and transfer to clean stoppered bottles. Store in the refrigerator for up to 3 months. Yields 5-6 cups.

  • *Prevents tiny pectin clumps.

Though it is an effort to make this tonic syrup, the incredibly tasty Scratch Grapefruit Gin & Tonic that you can create with it makes the project totally worthwhile. Densely packed with layer-after-layer of bitter grapefruit flavor, this tonic syrup is a real delight. Make it for yourself or give bottles away as gifts, so others can enjoy a rich and flavorful Gin & Tonic and sing your praises with every stir and swirl. If you enjoy this, be certain to check out our Tart Cherry Tonic Syrup and the Tart Cherry Gin & Tonic we make utilizing that. Cheers!


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Rating: 2.8/5 (5 votes cast)
Grapefruit Tonic Syrup, 2.8 out of 5 based on 5 ratings
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