Super juice is the bartender's answer to citrus economics. A standard lemon yields 30–45 ml of juice; super juice takes the same lemon, captures the oil from the peel, builds a flavour-balanced acid solution, and stretches that juice into 4–5× the volume — without tasting like a chemistry experiment. It is the closest thing in the modern bar to a free lunch.
Where It Came From
The chemistry was first articulated by Dave Arnold in Liquid Intelligence (W. W. Norton, 2014): citrus juice tastes the way it does because of a specific blend of acids — primarily citric, with a touch of malic — and most of the aroma comes from the peel oils, not the pulp. Match the acid profile and capture the peel oils, and you have something that drinks almost indistinguishably from the original.
Nickle Morris, of Expo Cocktail Bar in Louisville, Kentucky, popularized the simple, weighable form that bartenders actually use today (≈ 2020). The clean published ratios used in the calculator below come from Kevin Kos's widely cited writeup, which combines Morris's peel-oil method with Arnold's acid math.
The Chemistry
Three things have to be right for the trick to work:
The peel oils carry almost everything you associate with the smell of lemon. Squeezing a lemon over a drink and then discarding the peel throws most of the aroma away; super juice deliberately captures it by macerating the peel in dry acid first. The acid draws the oils out of the rind into a saturated solution.
The acid blend rebuilds the natural pH of lemon juice from scratch. For lemons it is straightforward — almost all the acidity is citric, so 1 gram of citric acid per gram of peel produces a solution with roughly the same kick as the original juice. (Limes are more complex; see the Lime Super Juice page for the citric + malic blend they require.)
The water dilutes the whole thing back to drinking strength — roughly 16.5 grams of water per gram of peel produces the ~5× stretch. The natural juice from the peeled lemons gets folded in at the end — not as a finishing touch but as the point of the exercise. Half the reason to make super juice is to use the whole fruit; throwing out the juice while keeping the peel would defeat that.
The Workflow
Super juice is calculated from what you actually have, not from a fixed recipe. The peel weight is the variable that drives everything else: the citric acid matches the peel weight gram-for-gram, the water is ~16.5× the peel weight, and the natural juice from the peeled fruit goes in too. Zest your lemons, juice the peeled fruit, weigh the peel, measure the juice — and enter both into the calculator.
Why Peel Weight, Not a Recipe
When you peel a lemon, you get whatever you get. Bigger lemons, thinner pith, a sharper Y-peeler, a longer pull — any of these change the yield, and the acid amounts have to follow. A fixed recipe ("27 g of peel") collapses the moment your lemons are larger or smaller than the assumed average. Drive the math from peel weight and the recipe scales itself.
The Juice Is Not Optional
The first published descriptions of super juice often presented the natural juice as a finishing touch. It isn't. The peeled lemons still contain most of their juice, and the whole point of the technique is to maximise useful citrus per piece of fruit — leaving the juice behind defeats it. Juice every lemon you peel; pour all of it into the final blend; let the calculator account for the volume.
Storage and Limits
Refrigerated in a clean bottle, super juice keeps two to three weeks before the flavour begins to flatten. The peel oils are the first thing to fade. For drinks where citrus freshness is the whole point — a Daiquiri made for two people, a single Sidecar — fresh juice still wins. For batched cocktails, party-scale shaking, or a bar service that would otherwise burn through a case of lemons in a shift, super juice is the obvious tool.
Bottom Line
Once you have a kitchen scale and a small bag of citric acid, the marginal cost of super juice is near zero. It will not replace fresh-squeezed for the drinks that demand it, but for nine out of ten home-bar uses it is indistinguishable — and one lemon goes a lot further.