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Cocktail Guide

What should I know about Classic Cocktail Ratios?

Professional bartenders use standardised ratios rather than specific volumes. The Sour family (Margarita, Whisky Sour, Daiquiri): 2 parts spirit : 1 part citrus : 1 part sweetener. The Negroni family: equal parts gin, Campari, sweet vermouth (1:1:1). The Spritz: 3 parts Prosecco : 2 parts aperitivo (Aperol, Campari) : 1 part soda. The Highball family (Gin and Tonic, Rum and Coke): typically 1 part spirit to 3-4 parts mixer. Understanding these ratios means you can scale any recipe and troubleshoot one that tastes off, since most cocktail problems come down to the balance between spirit, sweet, and sour being out of proportion.

What should I know about Batching Cocktails for Parties?

Batch cocktails are made in advance (minus fresh citrus and carbonated elements added at service). Advantages: consistent results, no individual shaking, faster service. Technique: calculate total spirit and modifier volumes, combine in a large container, stir or shake as needed, and refrigerate. Add citrus no more than 2 hours before service (it oxidises quickly). Add carbonated elements (Prosecco, tonic, soda) just before serving. Pre-dilution: a single cocktail is shaken with ice for 15 seconds, which adds a predictable amount of water — replicate this in a large batch by adding that same proportion of water upfront, then simply pour over ice rather than shaking each serving individually.

What do I need to know about Alcohol Units in Cocktails?

UK alcohol units = volume (ml) × ABV (%) ÷ 1000. A single 25ml measure of 40% spirit = 1 unit. A double (50ml) = 2 units. A standard glass of wine (175ml at 13%) = 2.3 units. The UK Chief Medical Officers advise no more than 14 units per week, spread across at least 3 days, with 2 alcohol-free days. A night out with 4 cocktails (each containing 2 units) = 8 units — more than half the weekly recommended limit. Knowing the unit content of each drink makes it easier to monitor intake without giving up on tracking your overall weekly total.

What's the key thing to understand about Non-Alcoholic Substitutions?

Alcohol-free spirits have improved dramatically since 2020. Seedlip, Lyre's, and CleanCo provide spirit substitutes in gin, rum, tequila, and whisky styles. The non-alcoholic versions work well in Spritz-style drinks and citrus-forward cocktails. Aquafaba (liquid from canned chickpeas) replaces egg white in Whisky Sours and Pisco Sours for vegan and sober guests — the foam and texture is indistinguishable from egg white. Tepache (fermented pineapple peel) and shrubs (fruit vinegars) provide comparable acidity and complexity to a spirit-based sour without any alcohol at all.

What should I know about the Standard Sour Ratio?

Many classic cocktails (Daiquiri, Margarita, Whiskey Sour) follow the same underlying 'sour' template: roughly 2 parts spirit, ¾-1 part citrus (lime or lemon juice), and ¾-1 part sweetener (simple syrup, orange liqueur, or similar) — once this base ratio is understood, it explains why so many seemingly different classic cocktails taste structurally similar and why a bartender can improvise a reasonable cocktail from almost any spirit using this same 2:1:1 (or 2:0.75:0.75) framework as a starting point. The exact citrus-to-sweetener balance is where most of the character and personal preference comes in — more citrus gives a sharper, more tart drink, more sweetener gives a rounder, softer one, and adjusting this ratio slightly to taste is standard bartending practice rather than a departure from a 'correct' recipe, since citrus fruits themselves vary enough in acidity that a fixed ratio rarely suits every batch of limes or lemons identically. A quick taste-and-adjust before serving a full batch is standard practice rather than a sign the recipe was wrong.

What do I need to know about Scaling Cocktails for Batch Service?

Batching cocktails for a party (pre-mixing a large-format version rather than making individual drinks) works cleanly for ingredients that don't change on standing (spirits, syrups, juices mixed together), but carbonated ingredients (tonic, soda, prosecco) and ice should always be added fresh at serving time rather than batched in advance, since pre-mixed carbonation goes flat and ice melts, diluting the batch unpredictably if added too early. A standard approach is to batch everything except the carbonated top-up and ice, scaled by multiplying the full recipe by the number of servings needed, then dividing into glasses with fresh ice and topping with the carbonated element just before serving — this keeps the fizz and avoids over-dilution while still getting the speed and consistency benefit of pre-batching the alcohol and juice components for a large group. Refrigerating the batched base also lets flavours meld slightly, which many bartenders consider a genuine improvement over mixing each drink fresh and individually.

What do I need to know about Diluting Batched Cocktails with Water for Ice Melt?

When a cocktail is shaken or stirred with ice, a portion of its final volume and texture comes from ice melt, which dilutes the drink and is factored into the original recipe's balance — something that's easy to overlook when scaling a cocktail recipe up for batch serving without ice shaken in individually. Professional bartenders account for this by adding a calculated amount of water directly into a batched cocktail mix before serving (commonly around 20-25% of the total spirit volume, though this varies by recipe and how it will ultimately be served), rather than relying on ice melting in each glass to provide dilution, since a large batch poured straight from a jug with no ice contact at all would otherwise taste harsher and more concentrated than the same drink made individually with proper shaking or stirring over ice. If the batched cocktail will still be served over ice in individual glasses, slightly less added water is needed than if it's served already chilled with no further ice contact, since some additional dilution will still occur in the glass. Getting this dilution right is one of the most overlooked steps in batch cocktail making, and skipping it is a common reason a home-batched version of a favourite cocktail tastes noticeably stronger and less balanced than the same drink made to order.

Classic Ratios by Cocktail Family

Most classic cocktails are built from a small number of repeating ratio templates, which is why learning a handful of ratios lets you make dozens of different drinks.

Once a ratio is memorised it can be scaled to any serving size or batch quantity, which is the basis for reliably scaling a cocktail recipe up for a party without it tasting noticeably different from a single hand-shaken serving.

Worked Example: Scaling a Margarita for 12 People

A standard single Margarita uses the classic sour ratio: 50ml tequila, 20ml triple sec/orange liqueur, 20ml fresh lime juice. Scaling this up for 12 servings multiplies each ingredient by 12: 600ml tequila (just over two-thirds of a standard 70cl bottle), 240ml triple sec, and 240ml fresh lime juice — typically requiring the juice of around 10-12 limes depending on size and juiciness.

When batching for a party, it's standard practice to add 10-15% extra water to the batch (beyond the ratio above) to compensate for the dilution that would normally come from shaking each drink individually with ice — without it, a large pre-mixed batch served over ice can taste stronger and less balanced than the same recipe made one glass at a time.

Diluting Batched Cocktails to Replace Shaking

When a cocktail is shaken individually with ice, a portion of the drink's final volume and flavour balance comes from the ice melting during the vigorous shake — typically adding somewhere around 20-25% extra volume as dilution, which softens the drink's intensity and integrates the ingredients. A large batch mixed in advance and simply poured over ice to serve misses this shaking-dilution step, which is why professional bartenders generally add water directly to a batched cocktail recipe (commonly 20-25% of the batch's total spirit volume) before chilling and serving, rather than relying on the serving ice alone to dilute it adequately. Skipping this step is one of the most common reasons a homemade batched cocktail tastes noticeably stronger and less balanced than the same recipe made fresh, shaken drink by drink.