Cocktail Infusions with N₂O Cream Chargers and Tanks

Rapid infusion changed how bars build flavour. Where a fat-washed bourbon used to take 24 hours of slow extraction in a sealed jar, a charged whipper does the same job in 90 seconds. The technique uses pressurised nitrous oxide to force aromatic compounds out of solid ingredients into a base spirit, oil, syrup or stock — and it has quietly become one of the most-used tools in modernist mixology. This guide covers how N₂O infusion actually works, the equipment cocktail bars rely on, and the brand picks that consistently deliver the cleanest results in Australian bar service.

What rapid infusion actually is

Rapid infusion uses the same physics as charging cream. Pressurised nitrous oxide forces itself into porous solid ingredients — fresh herbs, citrus peel, smoked bacon, vanilla pods, dried mushrooms, raw chocolate — and dissolves into the liquid base around them. When the pressure is released by depressing the lever, the gas escapes the solids violently, dragging dissolved aromatic and flavour compounds with it into the surrounding liquid.

The result is an infusion that traditionally takes hours or days, completed in under two minutes. A bartender pre-service can prepare six or seven flavoured spirit infusions during one shift change. A modernist kitchen can produce a fennel-infused olive oil, a coffee-washed rum, and a chilli-honey syrup before the first ticket comes in. The technique is what made signature cocktail menus turn over weekly instead of seasonally.

How the technique works in practice

The mechanics of an infusion are the same as making whipped cream — fill the whipper, charge it, shake, dispense — but with two important differences. The infusion sits inside the whipper for 30 to 60 seconds under pressure before you dispense it. And the dispensing is followed by a fine strain to separate the depleted solids from the now-flavoured liquid.

The base liquid

Almost any drinkable liquid works. Spirits (gin, bourbon, rum, vodka, mezcal), wine, fortified wine, oils, vinegars, syrups and dairy all infuse cleanly. Carbonated bases generally do not — the existing CO₂ interferes with N₂O uptake. The base goes into the whipper at room temperature for full aromatic extraction, or chilled if you want a more restrained, lower-volatile profile.

The solids

Porous fresh and dried ingredients deliver the cleanest infusions. Fresh herbs (basil, thyme, rosemary, sage), citrus peel, dried spices (cinnamon, cardamom, star anise, peppercorns), tea leaves, coffee beans, dried mushrooms, vanilla pods, raw cacao nibs and smoked solids all work. Dense or wet ingredients (whole fruits, fresh tomato, watermelon flesh) don’t extract well because the gas can’t penetrate them efficiently — for those, blanch and strain into a juice first, then infuse the juice.

The fat-wash variation

Fat washing forces lipid-soluble flavour compounds out of solid fats — bacon fat, brown butter, coconut oil, peanut oil — into a base spirit. The infusion happens in the whipper at room temperature in 60 to 90 seconds, the mixture is strained warm, and the liquid is then frozen briefly so the solidified fat can be skimmed off cleanly. The resulting spirit carries the savoury notes without any greasy mouthfeel. Bourbon-bacon, mezcal-coconut and gin-brown butter are the three most-replicated bar pairings using this method.

The five step process for a basic infusion

Step one prep the ingredients

Bruise herbs gently with the flat of a knife to expose oil glands. Crack hard spices in a mortar to break the skin. Roughly chop dried solids to expose interior surfaces. The goal is more surface area without crushing — pulverising solids creates fines that pass through the strainer and cloud the final liquid.

Step two load the whipper

Fill the whipper to no more than two-thirds capacity with your base liquid. The remaining third is gas headspace — without it, the pressurisation won’t reach the solids. Add the prepped solids directly to the liquid. Most bar recipes call for 5 to 15 grams of solids per 250ml of base, depending on the intensity of the ingredient.

Step three charge and rest

Screw the head on, drop a single 8g cream charger into the holder, and screw the holder until you hear the gas charge. Shake the whipper firmly six to eight times to drive the gas into the solids. Lay the whipper on its side or stand it upright and rest it for 30 to 60 seconds. The rest period is when the infusion happens — under-resting produces weak flavour, over-resting (above 90 seconds) starts pulling tannins and bitter notes from herbaceous solids.

Step four release the pressure

Hold the whipper upright over a fine-mesh strainer placed over a clean container. Slowly depress the lever to release the gas — it will escape with a forceful hiss, taking the dissolved aromatics out of the solids and into the liquid. Do not invert the whipper as you would for cream; the goal here is to release gas, not dispense liquid.

Step five strain and store

Open the whipper, pour the liquid through the fine strainer to catch the solids, and decant into a clean bottle. Most infusions are ready to use immediately; a brief rest in the fridge (15 to 30 minutes) tightens the flavour profile. Strained infusions keep refrigerated for 5 to 14 days depending on the base — alcohol-based infusions hold longest, dairy-based infusions shortest.

When to use a charger and when to use a tank

The economics of infusion work shift fast. A bar producing one or two infusions per shift can use 8g chargers comfortably — about $1 per infusion in gas cost, easy to manage operationally. A bar running six to ten infusions a night, or a modernist kitchen prepping multiple bases pre-service, will burn through chargers quickly enough that an N₂O tank becomes the better economics within a week.

A single 660g Skywhip Pro Max tank delivers roughly 100 charge cycles. A 3.3L Miami Magic 3.3L tank delivers around 400. For a busy cocktail bar running two services a day, the 3.3L tank typically lasts a fortnight while costing the equivalent of two bulk-pack 50-charger boxes. Tanks also dramatically reduce stock handling — one cylinder swap versus opening forty foil-wrapped charger packs over the same period.

Brand picks for cocktail infusion work

All food-grade N₂O is officially neutral in flavour. In practice, gas purity varies between brands and lots, and that variation matters in infusion work where any residue carries through into the final cocktail. The brands that consistently get the cleanest results in Australian bar service.

Miami Magic 3.3L for clean infusions

Miami Magic has built its reputation specifically around the cocktail bar segment. The 3.3L cylinder is the brand’s only size and the gas profile is reliably the cleanest of anything we stock — particularly noticeable in delicate infusions like floral gin (chamomile, elderflower) or smoke-washed mezcal where any gas residue would be obvious. Browse Miami Magic 3.3L for single tanks and multi-pack pricing.

Skywhip Pro Max for all-rounder reliability

Skywhip is the most consistent tank brand we carry across all sizes (660g through 4.4L). It is the right pick if your bar runs a mix of infusion work and standard whipped cream service from the same dispenser, because the gas quality is solid for both applications. Skywhip Pro Max is also our most popular bar account brand for new openings.

Ignite Max for high-volume venues

For venues running more than a 3.3L tank’s worth of infusions per week — usually multi-room cocktail bars or restaurants with infusion-heavy menus — the Ignite Max 4.6L is the largest single-cylinder option in Australia. Cost per gram is the lowest in the catalogue and a single tank can run an entire weekend service without a swap.

Supremewhip 8.2g for smaller operations

Bars that infuse less frequently or want to test recipes before committing to tank format can use Supremewhip 8.2g chargers. The 8.2g fill weight (slightly higher than standard 8g) gives a small margin of extra pressure, useful for thicker bases like syrups and oils where penetration matters.

Equipment beyond the charger

Charger format work needs nothing beyond a cream whipper rated for 8g cartridges — most bars already own one for whipped cream service. Tank format work requires a different setup. You need a regulator that fits your tank’s M11 thread, and a dispensing whipper rated for tank pressure. Most professional infusion devices (Smartwhip, ICO Cream Right, Mosa MasterWhip Pro) accept M11 regulators directly. Standard 8g cream whippers will not work with tanks.

The flavoured silent nozzles in our Accessories category are also worth knowing about. They reduce the noise of gas release by roughly 70% — a real advantage during late-service infusions when the loud hiss of a depressurising whipper is audible across the bar. The neutral (unflavoured) version is the right choice for cocktail work; the flavoured nozzles are better suited to dessert and dairy applications.

Five infusions worth trying first

If you are bringing N₂O infusion onto your menu for the first time, these five recipes consistently deliver the most-replicated results across Melbourne bars. All use a 500ml whipper and a single 8g charger.

Smoke-washed mezcal. 250ml mezcal blanco, 5g toasted oak chips. Charge, rest 60 seconds, strain. Lengthens the smoke profile without adding bitterness.

Bacon-washed bourbon. 250ml bourbon, 30ml warm rendered bacon fat. Charge, rest 60 seconds, strain warm, freeze 30 minutes, skim solidified fat. Used in old-fashioned variants.

Cucumber-mint gin. 250ml gin, 30g sliced cucumber, 5 fresh mint leaves. Charge, rest 45 seconds, strain. Lighter and more aromatic than letting it macerate in a jar.

Coffee-washed rum. 250ml dark rum, 10g coarsely cracked coffee beans. Charge, rest 60 seconds, strain. Use in espresso martini riffs.

Chilli-honey syrup. 250ml hot 1:1 honey syrup, 1 sliced bird’s eye chilli. Charge, rest 30 seconds, strain. Pairs with mezcal, tequila and rye.

Where to source N₂O for bar use in Melbourne

For a Melbourne bar starting infusion work today, we’d suggest a single 3.3L Miami Magic tank, a tank-rated dispenser with M11 regulator, and a backup pack of 8g chargers for off-shift recipe testing. Browse the full N₂O tank range, see Combo Deals for pre-built tank-and-charger bundles at lower combined pricing, or — if you are running infusion service across multiple venues — apply for our wholesale program for trade-rate pricing on regular orders. Same-day Melbourne delivery applies to every product, with most CBD bars receiving their order in 10 to 20 minutes from order confirmation.

Frequently asked questions