Fresh Lime Juice
The one ingredient where fresh and best are not the same thing. Lime juice peaks about four hours after squeezing rather than at the press, and it is finished inside a day. Almost everything a daiquiri or a margarita does rests on landing inside that window.
Quick Facts
Flavour Profile
Primary Flavours
Tasting Notes
Sharper and more aromatic than lemon juice, with pronounced acidity and a distinctive green citrus character.
Recommended Brand
Recommended
Fresh whole limes: ripeness decides this one rather than any label, so pick heavy fruit with a little give
Storage & Handling
Store whole limes refrigerated. Once juiced, store covered and refrigerated and use as soon as possible.
Shelf Life
Whole: 1–2 weeks refrigerated. Juiced: 24 hours refrigerated (best within 8–12 hours)
Usage
25 to 30ml in a sour, which is roughly one decent fruit. It carries the Daiquiri, the Margarita and the Mojito, and it is the acid in most things built on rum or agave. Squeeze to a schedule rather than to order once you know about the window.
Why Four Hours Beats Fresh
Dave Arnold ran the test that settled this in 2010 and published it again in Liquid Intelligence: hand-squeezed lime juice around four hours old beat juice straight from the press, repeatedly and clearly.
The mechanism is limonin. Fresh juice carries very little of it and a good deal of the precursor compounds, which convert on contact with air. Limonin is bitter, and in small quantities that bitterness is what gives the juice dimension rather than a flat sourness.
The same process is what ends it. Past roughly six hours the limonin keeps building until the bitterness stops seasoning and starts leading, which is why day-old juice manages to taste sharp and dull at once: the acid survives and the aromatics do not.
Against Lemon
The acids are close enough that swapping one for the other does not obviously unbalance a sour. The aromatics are not close at all, and that is the whole reason the convention exists.
Lime is greener and more resinous, the peel oils reading almost floral, and it meets cane and agave head on. Lemon is rounder and cleaner and sits better against grain and grape. A daiquiri built on lemon is a pleasant drink that is not a daiquiri.
Getting It Out of the Fruit
Room temperature, and rolled under a palm before pressing. A cold lime gives up noticeably less, and rolling breaks the segments so the press has less work to do.
Stop at resistance. The last of the squeeze drags oil out of the pith, and pith oil is a harsh bitterness quite distinct from the limonin that arrives on its own schedule. Strain the seeds and most of the pulp: a little pulp is texture, a lot is sediment in the bottom of a coupe.
Bottled, and Why Not
Pasteurisation is the problem rather than the bottle. Heat drives off the volatile aromatics and leaves the acid behind, which produces the flavour of day-old juice permanently rather than for an evening.
It has a use. In a cordial or a batched punch, where the acid is structural and the aroma is coming from somewhere else, it is a reasonable trade. In a daiquiri, where lime is half the drink, it is the difference between the recipe and an approximation of it.
Pro Tip
Lime juice defines freshness. If it’s dull, the drink will be too.
Top Tips
- Squeeze about four hours ahead rather than the night before. That is the window where the juice is at its best, and it closes inside a day.
- Roll the fruit at room temperature before pressing. A cold lime gives up noticeably less juice for the same effort.
- Stop pressing at resistance. The last of the squeeze pulls bitter oil out of the pith, which is a different bitterness from the one time gives you.
Possible Substitutions
- Fresh lemon juice (less aromatic)
- Citric acid solution (lacks aroma)
Production Method
Fresh limes are washed, cut, and squeezed by hand or press. Juice is strained to remove pulp and seeds. For service consistency, juice may be batch-prepped and stored cold in a sealed container.
History & Context
Lime juice became central to cocktail culture through naval, Caribbean, and tropical traditions, where its acidity helped preserve drinks and balance strong spirits. It remains one of the most defining acids in classic and modern cocktails.
Common Questions
How long does fresh lime juice keep?
It peaks around four hours after squeezing, holds acceptably for a day refrigerated, and is visibly duller after that. For a party that means juicing in the afternoon rather than the night before, which is the opposite of what most people plan.
Is bottled lime juice ever acceptable?
In a cordial or a batched punch, where the acid is structural and the aroma comes from elsewhere. Not in a daiquiri. Pasteurisation trades the volatile brightness for shelf life, and brightness is precisely the part a short rum sour was relying on.
How much juice is in one lime?
25 to 30ml from a decent fruit, rolled and at room temperature, so one lime covers one drink and the daiquiri arithmetic works out neatly. A cold lime straight from the fridge gives up appreciably less for the same effort.
Why do sour recipes fail with old juice?
Because the balance assumes fresh aromatics as well as acid. Day-old juice keeps the sourness and loses the perfume, so the drink reads as sharp and flat at the same time and no adjustment to the syrup will put back what has gone.