Botanical Tonic Syrup
Making your own tonic is a revelation. You control the bitterness citrus and sweetness to create something store-bought cannot match.
Making your own tonic is a revelation. You control the bitterness citrus and sweetness to create something store-bought cannot match.
- 2 tablespoonscinchona bark(source food-grade from specialty suppliers)
- zest of 2lemons
- zest of 1lime
- zest of 1orange
- 2 cupswater(Combine water cinchona bark and citrus zests in a saucepan.)
- 1 cupwhite sugar
- 1Bring to a simmer and cook for 20 minutes.
- 2Remove from heat and let steep for several hours or overnight.
- 3Strain through a coffee filter - this is essential to remove all bark particles.
- 4Return liquid to pan and add sugar.
- 5Heat gently while stirring until sugar dissolves.
- 6To use add 1-2 oz syrup to soda water for homemade tonic.
- 7Refrigerate and use within two months.
Store in a sealed glass bottle in the refrigerator for up to one month. Keep refrigerated.
Source food-grade cinchona bark specifically — it must be food-safe and tested for quinine content, not the medicinal grade bark sold in herbal medicine suppliers. Simmer the cinchona bark gently for ten minutes before adding the sugar and citrus zest; this softens and opens the bark's pores and produces better quinine extraction. Taste the finished tonic syrup diluted in sparkling water at the proportion you will use in cocktails — the undiluted syrup is intensely bitter and sweet and is not a reliable indicator of the final drink's balance. Standard dilution is one part tonic syrup to four parts sparkling water.
Tonic water's history is inextricably linked to quinine, the alkaloid extracted from the bark of the cinchona tree (Cinchona officinalis), which was discovered by Spanish Jesuit missionaries in Peru in the early 17th century as an effective treatment for malaria. The British in colonial India began dissolving quinine powder in carbonated water and adding sugar and citrus to make the bitterness palatable — this is the origin of tonic water. Schweppes introduced the first commercial bottled tonic water in 1870. The gin and tonic emerged as the standard preparation for quinine consumption in tropical British colonies, where gin was added to make the bitter tonic more enjoyable, and became a defining cultural drink of the British Empire. The craft tonic movement of the 2000s, driven by boutique producers including Fever-Tree (founded 2005) and Q Tonic, revived interest in real cinchona bark and botanical complexity, and homemade tonic syrups became a hallmark of serious cocktail programs seeking full control over bitterness level and botanical composition.
A floral tonic syrup can be made by adding two tablespoons of dried elderflower and one tablespoon of dried lavender to the botanical blend during simmering, creating a more aromatic tonic that pairs beautifully with floral gins. A gentian-forward bitter tonic, made by adding one tablespoon of dried gentian root alongside the cinchona bark, produces a more intensely bitter syrup similar to the profile of classic Italian acqua tonica. For a citrus-forward tonic with less bitterness, reduce the cinchona bark to one tablespoon and add the zest of one additional lemon during the last five minutes of simmering.
No common top-eight allergens. Naturally vegan and gluten-free. Contains quinine from cinchona bark — those with quinine sensitivity, G6PD deficiency, or taking quinolone antibiotics should consult a physician. Quinine can interact with blood thinners and certain heart medications.