Rosemary-Infused Gin and Tonic Recipe, Step by Step

A rosemary gin and tonic is a crisp cocktail made with gin, tonic water, fresh rosemary, ice, and a little citrus. This version briefly infuses the gin with rosemary before mixing, so the herb’s piney aroma comes through without taking over the drink. It is for adults of legal drinking age; drink responsibly.

The quick infusion takes 10 minutes and needs no special equipment: a small glass or jar, a spoon, and a strainer are enough. Make each drink just before serving to keep the tonic lively and fizzy.

What You’ll Need

2 oz (60 ml) London dry gin, or another clean, juniper-forward gin
1 small fresh rosemary sprig, about 2 in (5 cm) long or 0.07 oz (2 g), plus a small sprig for garnish if desired
4 oz (120 ml) chilled tonic water
1 lime wedge, about 0.25 oz (7 g), or a lemon wedge; use the juice and keep the wedge for garnish
1 cup (about 140 g) ice cubes, or enough to fill a short glass

Equipment: a small glass or jar for infusing, a spoon for gently pressing the rosemary, a strainer, a jigger or measuring cup, and a 10–12 oz (300–355 ml) serving glass. A fine-mesh strainer is useful if the rosemary leaves break into small pieces.

Step-by-Step

Chill and prepare the glass. If you have time, chill a 10–12 oz (300–355 ml) glass in the refrigerator for 5 minutes while you prepare the other ingredients. Measure the gin and tonic, and keep the tonic in the refrigerator until you are ready to pour. A chilled glass and cold tonic help the drink stay crisp as the ice melts.
Rinse and inspect the rosemary. Rinse the small sprig under cool running water, then pat it dry. Remove any browned or damaged leaves. Drying matters because drops of water can dilute the measured gin, and a clean sprig keeps grit out of the drink. If the stalk is woody, that is fine; the leaves carry most of the aroma.
Briefly infuse the gin. Put the rosemary sprig in a small glass or jar and pour in 2 oz (60 ml) gin. Use the back of a spoon to press the leaves gently once or twice. The aim is to release their fragrance, not crush them into a paste. Leave the gin to steep for 10 minutes at room temperature. Avoid extending the steep as a first attempt: rosemary can become sharply resinous or bitter if it is bruised heavily or left in the spirit too long.
Prepare the citrus and serving glass. While the gin infuses, cut a lime or lemon wedge. Squeeze a small amount of juice into the serving glass—about 1 teaspoon (5 ml) is a good starting point—and set the wedge aside. Add about 1 cup (140 g) ice, filling the glass close to the top. Large, solid cubes melt more slowly than small or cracked ice.
Strain the infused gin over the ice. Pour the gin through a strainer into the serving glass. If you can see leaf fragments, use a fine-mesh strainer. Discard the used rosemary rather than leaving it in the finished cocktail; continued contact can make the herbal flavor more forceful while you drink.
Top with tonic and mix gently. Add 4 oz (120 ml) cold tonic water. Stir once or twice from the bottom upward with a long spoon, just enough to combine the gin and citrus with the tonic. Avoid vigorous stirring, which releases carbonation and leaves the drink flatter.
Taste, garnish, and serve. Take a small sip. If it tastes too dry or bitter, add a little more tonic; if it seems too mild, squeeze in a few more drops of citrus or add a small amount of gin. Garnish with the reserved citrus wedge and, if desired, a fresh rosemary sprig. Serve straight away while the tonic is still sparkling.

Common Mistakes

Steeping the rosemary for too long: Rosemary has a powerful, woodsy aroma. A long infusion can crowd out the gin’s juniper and make the drink taste medicinal or pine-resin-like. Start with 10 minutes and taste the gin before using it. If you prefer a stronger herbal note next time, increase the steep gradually by a few minutes rather than leaving the sprig in indefinitely.

Muddling the leaves aggressively: Crushing or shredding the sprig makes the infusion harsher and can send tiny leaf pieces into the drink. A light press is enough to open the leaves’ surface and release fragrance. Do not use a cocktail muddler with force; the sprig should remain mostly intact.

Using warm tonic or too little ice: Warm tonic loses its sparkle quickly, and a glass with only a few cubes lets the ice melt rapidly. Chill the tonic beforehand and fill the glass generously with ice. The drink will be cold without needing to add extra tonic just to cover the ice.

Pouring tonic too quickly or stirring too much: A fast, forceful pour and repeated stirring drive off carbonation. Add tonic gently down the side of the glass or over the back of a spoon, then stir only once or twice. The goal is an evenly mixed drink that still has a lively fizz.

Overdoing the citrus: A large squeeze of lime can make the cocktail sour and mask the rosemary. Begin with about 1 teaspoon (5 ml) of juice, taste, and add more only if needed. Citrus wedges vary in size and juiciness, so squeezing the whole wedge at once can be difficult to correct.

Tips

Choose a compatible gin. A straightforward London dry gin gives rosemary room to show while keeping the familiar juniper character of a gin and tonic. A strongly floral or spice-heavy gin can also work, but its botanicals may compete with the herb. If using a more aromatic gin, steep the rosemary for 5–7 minutes first and taste before deciding whether it needs longer.

Keep the garnish aromatic, not decorative only. A fresh rosemary sprig can add fragrance as you raise the glass. Gently tap the garnish between your palms once before adding it; do not rub it into small pieces. If the sprig is very large, trim it so it does not dominate the glass or brush heavily against the drinker’s face.

Adjust the tonic to your preferred balance. The listed 2:4 ratio of gin to tonic makes a relatively light, refreshing drink. For a stronger cocktail, use 2 oz (60 ml) gin and 3 oz (90 ml) tonic; for a milder one, use 1.5 oz (45 ml) gin and 4.5 oz (135 ml) tonic. Keep the same brief infusion method, and taste before adding extra citrus.

Make a small batch only if you can serve it promptly. For two drinks, infuse 4 oz (120 ml) gin with two small rosemary sprigs for 10 minutes, then strain. Divide the infused gin between two ice-filled glasses and top each with 4 oz (120 ml) tonic. Do not scale the steep time automatically: the amount of gin changes, but a longer steep is not necessary. Add tonic only when you are ready to serve.

Use fresh rosemary when possible. Fresh sprigs give a clean, bright scent and are easy to remove after a short infusion. Dried rosemary is much more concentrated and can shed small fragments; if it is your only option, use a small pinch in a tea infuser and taste after 2 minutes. Its flavor may be more earthy and less fresh, so add it cautiously.

Keep any prepared infusion cold. The simplest approach is to infuse only the amount you plan to use. If you do make extra, strain out the rosemary, place the gin in a clean covered container, and refrigerate it within 2 hours. Use it within 2 days for the freshest flavor, and mix with tonic only when serving. Do not store the finished carbonated cocktail for later.

Troubleshooting

The rosemary flavor is too strong or bitter: If the gin has not yet been mixed, dilute it with uninfused gin, using equal parts as a starting point, and taste again. If the cocktail is already assembled, add cold tonic a splash at a time and a little more ice. For the next drink, shorten the steep, press the sprig more gently, or use a smaller sprig. Removing the rosemary after straining prevents the flavor from continuing to intensify.

The drink tastes too weak or the rosemary is barely noticeable: Check that the rosemary was fresh and aromatic, and make sure it was pressed gently before the steep. Add a clean rosemary sprig as a garnish and give the drink a moment before tasting again; its aroma can make the herbal note more apparent. For a stronger next batch, steep for 12–15 minutes, tasting the gin at intervals, rather than crushing the leaves more forcefully.

The cocktail is too bitter or dry: Some tonic waters are more bitter than others, and citrus pith can contribute a sharp edge. Add 0.5–1 oz (15–30 ml) more tonic and taste. If the bitterness is still too prominent, use less lime juice next time or choose a less bitter tonic. A small squeeze of lemon can taste rounder than a large squeeze of lime, though the result will be less lime-forward.

The drink is too sour: Add tonic in 0.5 oz (15 ml) increments, stirring gently after each addition. If you have not added all the tonic yet, pause and taste before pouring the rest. In a future serving, start with only 0.5 teaspoon (2.5 ml) citrus juice, then adjust after the gin and tonic are combined.

The tonic has gone flat: Once carbonation has escaped, stirring cannot bring it back. Add a fresh, cold pour of tonic and mix only once, or remake the drink with a newly opened bottle or can. For future servings, chill the tonic, pour it gently, and avoid preparing the cocktail well ahead of time.

Frequently Asked Questions

Can I infuse the gin ahead of time?
Yes. Steep the gin with rosemary for 10 minutes, taste it, and strain out the sprig as soon as the flavor is where you want it. Refrigerate the covered gin within 2 hours and use it within 2 days for best flavor. Add tonic and ice just before serving so the drink remains fizzy.

Can I use dried rosemary instead of fresh?
Yes, but use much less because dried rosemary is concentrated and can be difficult to strain. Put a small pinch in a tea infuser, steep it in the measured gin for about 2 minutes, and taste. The drink will usually have a more earthy, less bright herbal note than one made with fresh rosemary.

What tonic water works best?
A classic, moderately bitter tonic is a reliable starting point because it lets both gin and rosemary come through. A sweeter tonic makes the drink rounder, while a strongly bitter one gives it a drier finish. Since brands and styles vary, begin with the recipe amount and adjust the ratio to your taste.

Can I make this without citrus?
Yes. The drink will still work with gin, rosemary, tonic, and ice, but it will taste less bright. Try a thin lemon or lime peel as a garnish instead of juice; twist it over the glass to release its aroma, then drop it in if you like. Avoid including much white pith, which can taste bitter.

Can I make a pitcher for a gathering?
You can prepare the rosemary-infused gin in a larger batch, strain it, and keep it chilled. For the freshest result, pour individual servings over ice and add tonic to each glass just before serving. If you combine everything in a pitcher early, the tonic will lose fizz and the ice will dilute the drink.

What if I do not have a strainer?
Remove the rosemary sprig with clean tongs or a spoon, then pour carefully so any loose leaves stay behind. A small kitchen sieve also works. If the leaves have broken apart, let them settle briefly and pour slowly; avoid swallowing woody rosemary pieces.

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