Techniques — The Lab — Therapeutic Cocktails

Bartender hands shaking a Boston shaker, warm overhead light, motion frozen mid-shake

04 Shake, Stir, Build

Quick reference

Shake

Citrus · Cream · Egg · Foam

Stir

Spirit-forward · No citrus · Clarity

Build

Highballs · Carbonated · In-glass

Dry shake

Egg white · Aquafaba · Foam first

Float

Layer on top · Aroma · Visual

Rinse

Whisper of flavour · Glass prep

01 · Primary technique

The Shake

AerationDilutionTemperatureTexture

Use when Any drink containing citrus juice, egg white, aquafaba, cream, or dairy

What it is

A vigorous two-handed shake using a Boston shaker — the large tin sealed over the small tin or glass — performed for 10 to 12 seconds with hard, cold ice. The shaker is gripped firmly at both ends, held parallel to the floor, and driven in a sharp back-and-forth motion. The goal is not rhythm — it is force. A timid shake produces a timid drink.

What it does to your drink

Shaking accomplishes three things simultaneously. First, it chills the drink rapidly — the liquid drops to approximately −5°C to −6°C when shaken correctly with hard ice. Second, it dilutes by 20–25%, adding water from the surface of the ice that is essential to the drink's balance — an un-diluted cocktail tastes harsh and unintegrated. Third, it aerates: the violent movement introduces air bubbles that lighten the texture and create brightness. This aeration is why a shaken Daiquiri tastes different from a stirred one — the texture is livelier, the palate entry more open. For any drink with citrus, the emulsification of juice, spirit, and sweetener requires the mechanical energy of a shake.

Pro tip

Shake away from people. The seal between tins can fail under pressure, and it will always fail toward whatever is in front of you. Give the join a firm tap with the heel of your hand before shaking. If the seal is tight, it won't break.

02 · Primary technique

The Stir

IntegrationDilutionTemperatureClarity

Use when Spirit-forward drinks with no citrus, cream, or egg white — Martinis, Manhattans, Negronis, Old Fashioneds

What it is

A circular motion of the bar spoon inside a mixing glass packed with ice, repeated for 20 to 30 rotations. The spoon is held between the thumb and first two fingers with the back of the spoon bowl against the interior glass wall, and rotated with the wrist rather than the arm — the spoon stays in contact with the glass throughout. The motion is smooth and continuous, without lifting the spoon.

What it does to your drink

Stirring chills and dilutes without aerating. This distinction is the entire point. A stirred drink arrives silky — the spirits integrate seamlessly, no air bubbles disrupt the texture, and the precise character of each ingredient is preserved clearly. A Martini stirred is cold, clean, and direct. A Martini shaken is cloudy from aeration and ice shards, diluted differently, and textured where it should be smooth. The "never shake a Martini" principle is not snobbery — it is an accurate description of two categorically different drinks. Spirit-forward drinks are stirred because integration and clarity are the desired outcome, not brightness or foam.

Pro tip

Pre-chill the mixing glass before building. Fill it with ice and water, stir briefly, then discard before adding your spirits. A room-temperature mixing glass costs you 3–4 degrees of final temperature. Once built, stir smoothly — no clinking, no splashing. The sound of a well-stirred drink is almost silent.

03 · Primary technique

The Build

SimplicityControlled dilutionCarbonation

Use when Highballs, simple long drinks, drinks where the ice should melt slowly in the glass

What it is

Construction directly in the serving glass, over ice, in a specific order: spirit first, over the ice, then mixer poured gently down the side of the glass. One brief stir with a bar spoon — if at all — to integrate without agitation. The built drink is the most direct format in cocktail-making: what you put in is what arrives. There is nowhere to hide imprecise technique or low-quality ingredients.

What it does to your drink

Building preserves carbonation. Pouring a carbonated mixer directly onto ice agitates the CO₂ out of solution — which is why a built Gin & Tonic goes flat faster than one poured correctly down the side of a tilted glass. Building also allows the drink to evolve as the ice melts, which is intentional: an Old Fashioned built in the glass is designed to be sipped over 20 minutes, diluting gradually as the drinker decides the pace. The built technique is not a shortcut — it is the correct method for a specific category of drink.

Pro tip

For carbonated built drinks: add spirit over ice, then tilt the glass at 45 degrees and pour the carbonated mixer slowly down the inside wall. The liquid meets the spirit gently, minimising CO₂ loss. One gentle stir — run the bar spoon down the inside of the glass once and lift — is all the integration a Highball needs.

04 · Foam technique

The Dry Shake

Foam volumeTextureStability

Use when Any drink with egg white or aquafaba where a thick, stable foam is required

What it is

A shake performed without ice — typically for 15 to 20 seconds — before the ice shake. The purpose is to emulsify the egg white or aquafaba proteins without the interference of ice, which dilutes and chills the foam before it has a chance to develop structure. The dry shake comes first; the ice shake comes second.

What it does to your drink

Egg white and aquafaba foam depends on protein denaturation — the unfolding of protein structures that creates a stable bubble network. Cold temperature inhibits this process. A dry shake at room temperature allows the proteins to emulsify fully and develop a dense, stable foam before the ice shake chills and sets the texture. The result is a foam that is thick, persistent, and silky — sitting on top of the drink as a distinct layer rather than dissolving into it. A Whisky Sour made with a proper dry shake has a foam that holds for the duration of the drink. One made without it has a thin, disappearing froth.

Pro tip

Remove the small tin or glass from the shaker for the dry shake — use only the large tin with a Hawthorne strainer placed over the top as a loose cap, or use a cocktail shaker with the strainer in place. Some bartenders add a clean spring from a spare Hawthorne strainer to the tin during the dry shake — it acts as a whisk inside the tin and dramatically improves foam quality.

05 · Foam technique

The Reverse Dry Shake

Foam textureFinenessPresentation

Use when Egg white or aquafaba drinks where an especially fine, silky foam is the priority

What it is

The reverse of the standard dry shake: shake with ice first to chill and dilute the drink, strain into the empty tin, discard the ice, then dry shake the strained liquid for 15 to 20 seconds. The result is a finer, lighter foam than the standard dry shake — because the liquid is already cold and slightly diluted when the second shake begins.

What it does to your drink

The reverse dry shake produces a different foam texture than the forward dry shake. Because the liquid is already cold, the foam that forms during the second shake is denser and finer — smaller bubbles, silkier mouthfeel, more uniform surface. Many bartenders consider it the superior technique for presentation: the foam sits tighter and holds its shape longer. The trade-off is an extra step and the need to re-strain after the second shake. For a Pisco Sour or a Paper Plane with egg white, the reverse dry shake produces a noticeably more refined result.

Pro tip

After the reverse dry shake, strain through a fine mesh strainer directly into the glass in one continuous pour. The strained foam is more stable and will sit cleanly as a distinct top layer. Do not stir or disturb after pouring.

06 · Gentle technique

The Roll

Light aerationMinimal foamIntegration

Use when Bloody Marys, drinks where some integration and minimal aeration is needed without a full shake

What it is

A transfer of the drink between two tins — poured back and forth several times from a height — without the aggressive agitation of a shake. The liquid rolls from tin to tin, incorporating a small amount of air and integrating the ingredients gently. It is a technique borrowed from the Bloody Mary service tradition, where shaking the thick tomato juice produces an unpleasant froth.

What it does to your drink

Rolling produces a drink that is slightly aerated but not frothed — the tomato juice and spirits integrate without the aggressive emulsification a shake would create. The texture remains dense and smooth, which is correct for a Bloody Mary, where the viscosity of the tomato juice is part of the drink's character. Rolling also chills the drink moderately — less than a shake, more than a stir — which is appropriate for a longer, more contemplative drink. Outside of the Bloody Mary, the roll is occasionally used for delicate drinks where a stir would be too flat and a shake too aggressive.

Pro tip

The height of the pour matters — a higher arc means more air incorporation and slightly more chill. Start with a 15–20cm gap between the tins and adjust based on how much aeration you want. Catch cleanly: a missed pour means a mess and a wasted drink.

07 · Precision technique

The Float & Layer

Visual stratificationAromaNose-forward delivery

Use when Drinks where a specific ingredient should sit on top — a red wine float, a cream layer, a high-proof spirit cap

What it is

Pouring a liquid slowly over the back of a bar spoon held just above the surface of the drink, so it settles on top rather than mixing in. The spoon disperses the energy of the pour, allowing the denser liquid already in the glass to support the lighter liquid being added. Density determines which liquid floats: a denser liquid sinks, a lighter one floats. Sugar content and alcohol level are the primary density factors.

What it does to your drink

The float delivers an ingredient's aroma directly to the nose before the sip begins. A red wine float on a New York Sour sits as a deep ruby layer over the citrus foam — the wine's tannins and aroma reach the nose first, framing the drink before the Whisky Sour underneath arrives on the palate. A cream layer on an Irish Coffee works similarly: the cold cream against the hot coffee creates a temperature contrast that is part of the drink's design. The layer technique is not purely visual — it sequences the drinker's sensory experience in a deliberate order.

Pro tip

Chill the spoon before using it for a cream or dairy float — a warm spoon will slightly warm and break the cream as it passes over it. For a wine float, pour at the slowest speed you can manage. If the wine sinks, your base drink is less dense than the wine — check your ratios or add more sugar to the base.

08 · Preparation technique

The Rinse

AromaSubtletyGlass preparation

Use when When a flavour should be present as a whisper — the Sazerac's absinthe rinse, a smoky mezcal rinse in a Margarita glass

What it is

A small amount of a strongly flavoured spirit — typically absinthe, mezcal, or a heavily peated Scotch — is poured into a chilled glass, swirled to coat the entire interior surface, then discarded (or drunk separately). What remains is an invisible film of the spirit's aromatic compounds clinging to the glass walls, perfuming every sip of the drink that follows without contributing measurable volume or alcohol.

What it does to your drink

The rinse is one of the most elegant techniques in cocktail-making because it is almost imperceptible yet completely changes the drink. A Sazerac without the absinthe rinse is a good rye cocktail. With it, the anise aroma arrives before every sip, framing the rye and bitters in a different context. The drinker cannot always identify what they're smelling — they just know the drink is more complex. The rinse technique acknowledges that aroma is the largest component of flavour perception, and that a trace of an ingredient can contribute more than a full measure would.

Pro tip

Use the smallest possible amount — typically 5–10ml. Swirl until every part of the interior surface is coated, including the rim. Discard confidently: leaving excess liquid in the glass changes the ratio. Keep the rinsed glass in the freezer while building the drink elsewhere — the glass should be cold when the drink arrives.

09 · Aeration technique

The Swizzle

AerationFrostTemperatureTexture

Use when Swizzles, Tiki drinks, Cobblers — any drink built over crushed ice that needs simultaneous mixing and chilling

What it is

A swizzle stick — a thin branched stick from the Quararibea turbinata tree, or a bar spoon used as a substitute — is inserted into a glass packed with crushed ice and rotated rapidly between the palms, causing the branches or spoon to spin and agitate the drink in all directions simultaneously. The swizzling motion aerates the drink, forces the ice to chill the liquid rapidly, and creates the characteristic frost on the outside of a metal cup or glass.

What it does to your drink

Swizzling is the only technique that aerates, chills, and mixes simultaneously in the glass. The rapid rotation creates a small vortex that draws the drink upward through the ice while the ice surface chills it from all sides. The result is a drink that is genuinely cold — colder than a shaken drink, because the ice is in direct and continuous contact with the liquid throughout mixing. The frost on the outside of a proper Swizzle glass signals that the drink is at the correct temperature, typically below −5°C. It is also a visual cue that the technique has been executed correctly.

Pro tip

If you don't have a swizzle stick, a bar spoon works adequately — place the back of the spoon against the inside of the glass and spin the handle rapidly between your palms. The goal is speed of rotation, not depth of insertion. Pack the crushed ice to the top of the glass before swizzling — the ice will settle and compress as you go.

10 · Infusion technique

The Fat Wash

FlavourTextureRichness

Use when Infusing a fat-soluble flavour into a spirit — butter, bacon, coconut oil, sesame, brown butter

What it is

A warm fat — clarified butter, bacon fat, coconut oil, nut butter — is combined with a spirit at room temperature or slightly warm, then frozen until the fat solidifies and separates from the liquid. The solidified fat is removed by straining, leaving behind a spirit that has absorbed the fat-soluble flavour compounds without the fat itself. The technique was popularised by bartender Don Lee at PDT in New York and has become a foundational tool of the modern cocktail kitchen.

What it does to your drink

Fat carries flavour compounds that are not water-soluble and cannot be introduced into a spirit any other way. A bacon fat-washed bourbon carries the smoky, savoury, umami quality of bacon in a smooth, clear spirit with no greasiness — because the fat has been removed, but its soluble flavour compounds remain dissolved in the alcohol. The texture of a fat-washed spirit is perceptibly richer and rounder than the unwashed base, even without a visible fat component. The technique allows flavours like brown butter, toasted sesame, or coconut to be incorporated into a spirit with a precision and cleanliness that infusion alone cannot achieve.

Pro tip

The ratio is typically 30–60ml of fat per 700ml of spirit. Combine warm fat and spirit, stir well, leave at room temperature for 4 hours (or refrigerate for 24 hours for a gentler, more controlled infusion), then freeze overnight. Skim and strain through a coffee filter or fine cheesecloth. Label with the date — fat-washed spirits should be used within 3–4 weeks and stored cold.