Drinks · British cuisine

Rosemary and Citrus Cordial

cordialcitrusrosemarymake-ahead
8 ingredients Cuisine: British Page updated October 2026
Rosemary and Citrus Cordial

Photo: The Delicious Life, CC BY 2.0

This rosemary and citrus cordial turns grapefruit, lemon, ginger and a handful of herbs into a single bottle of syrup that keeps well in the fridge. Rolling the rosemary with a rolling pin before it goes in the pan releases its oils, so the resin note stands up to the sharp juice. Stir it into fizzy water for a cold soda, or into hot water with whiskey for a toddy.

Instructions

Use a peeler to take long strips of peel from the grapefruit and from 2 of the lemons. Avoid cutting into the white pith underneath, which would make the cordial bitter.

Put the peel strips into a saucepan. Juice all the lemons and the grapefruit, then pour the juice into the pan.

Lay the rosemary sprigs on a chopping board and roll a rolling pin over them a few times. This bruises the leaves and releases their oils.

Add the rosemary, sliced ginger, sugar and water to the pan. Heat over a low-medium heat for 5 minutes, stirring now and then, until the sugar has dissolved.

Turn the heat down to low and cook for 15 minutes, until the liquid has become a slightly thick syrup. Leave it to cool. You can use it straight away, or chill it overnight so the flavors develop.

Strain the syrup through a sieve into a bowl or jug, then pour it into a bottle.

For a soda, stir 1 to 2 tablespoons of cordial into ⅔ cup (160 ml/5.4 US fl oz) of fizzy water. For a hot toddy, add the cordial to boiling water with 2 tablespoons of whiskey.

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