Bitters add a fragrant, gently spiced edge to a classic gin and tonic, bringing out the citrus and botanicals in the gin without making the drink taste medicinal. This easy, single-serving recipe uses aromatic bitters in measured dashes, plenty of ice, and a fresh citrus garnish for a crisp, well-balanced cocktail.
Ingredients
- 2 ounces (60 ml) London dry gin
- 4 ounces (120 ml) chilled tonic water, or enough to top up the glass
- 2 dashes aromatic bitters, such as Angostura bitters (about 1/8 teaspoon total; dash sizes vary)
- 1 teaspoon freshly squeezed lime juice, optional
- 1 lime wheel or wedge, for garnish
- 1 cup ice cubes, preferably large, plus more to fill the glass
Instructions
- Chill the glass. If you have time, fill a highball glass with ice and water for a minute while you gather the ingredients. Discard the water before making the drink. A chilled glass helps slow dilution.
- Add the ice and gin. Fill the glass to the top with fresh ice. Pour in 2 ounces of gin. Using a full glass of ice keeps the drink cold and generally melts more slowly than using just a few cubes.
- Season with bitters. Add 2 dashes of aromatic bitters. If using lime juice, add 1 teaspoon now. Stir gently for a few seconds to combine the gin, bitters, and juice.
- Top with tonic. Slowly pour in about 4 ounces of chilled tonic water. Give the drink one gentle lift from the bottom with a bar spoon, or a brief stir, so the ingredients mix without driving out too much carbonation. Taste and add a little more tonic if you prefer a lighter drink.
- Garnish and serve. Squeeze the lime wheel or wedge lightly over the glass, then drop it in or rest it on the rim. Serve right away while the tonic is fizzy and the ice is firm.
Tips
- Start with less bitters if uncertain. Bitters are concentrated, and brands vary in intensity. Begin with 1 dash, taste, then add another if you want a stronger spice and herbal note. A dash is not a precise universal measure, so use the bottle’s dasher consistently.
- Keep the tonic cold and fresh. Chilled tonic retains its bubbles better in the glass. Once opened, close the bottle or can and refrigerate it; for the best carbonation, use it within a day or two, following the package guidance.
- Choose a compatible gin. A classic London dry gin gives a clean juniper base, while a citrus-forward gin makes the lime and bitters especially bright. Avoid an aggressively flavored gin at first, since it can compete with the bitters.
- Don’t over-stir or skimp on ice. A long stir flattens tonic, while too little ice can cause faster melting. Fill the glass, add tonic gently, and mix only enough to distribute the bitters.
Serving Suggestions
Serve this gin and tonic as an aperitif or alongside salty, savory snacks such as olives, roasted nuts, or crisp crackers. Its bitter-citrus character also pairs well with grilled seafood, smoked salmon, and simple dishes with fresh herbs. For a small gathering, prepare each drink individually rather than combining a large pitcher in advance; tonic loses carbonation once poured and stirred.
Use a highball or large wine glass so there is room for ice, tonic, and garnish. A lime wheel is familiar, but a thin strip of grapefruit or orange peel can add a different aroma. Express the peel over the surface by twisting it gently, then use it as the garnish. Keep additional citrus on the side so guests can adjust their drinks without making the whole batch sharper.
Variations
- Orange bitters version: Replace the aromatic bitters with 2 dashes of orange bitters. The result is brighter and more citrus-led; add a strip of orange peel instead of lime if you like.
- More aromatic: Use 3 dashes of aromatic bitters and garnish with a lime wheel. Increase gradually, since the extra bitters can make the drink noticeably spicier and less refreshing.
- Less bitter and lighter: Use 1 dash of bitters and top with 5 to 6 ounces of tonic in a larger glass. Keep the gin at 2 ounces so the drink stays balanced rather than simply tasting diluted.
- Soda-water highball: For a less sweet drink, use 3 ounces tonic and 1 ounce chilled soda water. This preserves some tonic flavor while lowering its sweetness.
- Zero-proof option: Use a nonalcoholic gin alternative and tonic, then add bitters only if the product is suitable for your needs. Many conventional bitters contain alcohol, even when used in small amounts, so check the label if avoiding alcohol completely.
Storage and Reheating
This is a mixed, carbonated drink, so it is best made just before serving rather than stored. Ice melts and tonic goes flat quickly; once mixed, drink it promptly, ideally within about 15 to 20 minutes. Do not leave it at room temperature for hours or save a half-finished drink for another day.
You can prepare individual components ahead: chill the gin, tonic, glass, and garnish separately. Store opened tonic in the refrigerator with its cap or can cover secured, and follow its label for use after opening. Keep cut lime in a covered container in the refrigerator and use it within about 2 to 3 days for the freshest flavor. There is no reheating step; warming the drink would ruin its carbonation and flavor.
Frequently Asked Questions
What do bitters do in a gin and tonic?
Bitters add concentrated botanical, spice, and citrus-like flavors. In small amounts, they make the gin taste more layered and can balance tonic’s sweetness. They are a seasoning, not a substitute for gin or tonic.
How many dashes of bitters should I use?
Two dashes are a good starting point for a drink made with 2 ounces of gin and 4 ounces of tonic. Use one dash for a subtle touch or add a third after tasting. Because dashers differ, adjust by flavor rather than assuming every dash is exactly the same volume.
Can I use any kind of bitters?
Yes, but the flavor will change. Aromatic bitters bring warm spice and herbal notes; orange bitters are more citrus-forward. Flavored bitters such as chocolate or celery can work, but use them sparingly and choose a garnish that suits their profile.
Can I make this without tonic water?
Yes. Soda water makes a drier, less sweet highball, though it lacks tonic’s characteristic bitterness. You can use all soda water or combine it with some tonic as suggested in the variations. Taste before adding extra bitters, since the balance will differ.
Are bitters alcoholic?
Many traditional cocktail bitters are made with high-proof alcohol, though only a small quantity is used in this recipe. If you need to avoid alcohol for health, personal, or religious reasons, check the product label and choose a clearly alcohol-free alternative—or omit the bitters.
Can I make a pitcher ahead?
You can combine the gin and bitters shortly before serving, but wait to add tonic until the last moment so it stays fizzy. For the best result, pour over ice and finish each glass individually. A fully mixed pitcher will quickly lose carbonation and become diluted.