Whisky Sour Recipe UK: A Balanced Classic Cocktail

A whisky sour is a classic cocktail made with whisky, fresh lemon juice and sugar syrup, shaken with ice and served chilled. This UK-friendly recipe balances tart citrus with gentle sweetness, and an optional egg white gives it a soft, foamy top.

Ingredients

2 fl oz (¼ cup; 60 ml) whisky: Scotch whisky, bourbon or another style you enjoy
¾ fl oz (1½ tbsp; 22 ml) freshly squeezed lemon juice, strained of pips
¾ fl oz (1½ tbsp; 22 ml) simple syrup, preferably 1:1 sugar syrup
½ fl oz (1 tbsp; 15 ml) pasteurised egg white, optional, for a foamy texture
2 dashes aromatic bitters (about 1 ml), optional
1 cup (about 140 g) ice cubes for shaking
1 large ice cube, or ½ cup (about 70 g) fresh ice, for serving
1 thin lemon wheel or wedge (about 5 g), to garnish
1 cocktail cherry (about 8 g), optional, to garnish

Instructions

Prepare the glass and ingredients. Choose a rocks glass for a drink served over ice, or a chilled coupe for a drink served without ice. Measure the whisky, lemon juice and simple syrup. If using egg white, use pasteurised egg white from a freshly opened carton or a pasteurised egg; it is the safest choice for pregnant, elderly or immune-compromised guests. Set aside the garnish. This recipe takes about five minutes from measuring to serving.
Combine the drink. Pour the whisky, lemon juice and syrup into a cocktail shaker. Add the egg white and bitters if using. Check that the shaker is properly closed before shaking. If you do not have a cocktail shaker, use a clean jar with a tight-fitting lid, leaving enough room for the ingredients and ice to move.
Dry-shake if using egg white. Before adding ice, shake the mixture firmly for about 15 seconds. This emulsifies the egg white and helps create a more even foam. If you are leaving out the egg white, skip this step and move straight to shaking with ice.
Shake with ice. Add the cup of ice to the shaker, close it securely and shake hard for 12–15 seconds, until the outside feels very cold. The ice chills and dilutes the drink as it moves; this is an important part of balancing the strong whisky and sharp lemon, not just a way to cool it.
Strain and garnish. For a rocks serve, put the large fresh ice cube into the glass, then strain the cocktail over it. For a coupe, strain into the chilled glass without adding serving ice. Garnish with a lemon wheel or wedge and, if you like, a cocktail cherry. Serve straight away while the drink is cold and the foam is still defined.

Tips

Use fresh lemon juice. Squeeze the lemon shortly before mixing and strain out any pips. Fresh juice gives the drink a clean, lively tang. Bottled lemon juice can work in a pinch, but it may taste flatter or more sharply acidic, so start with a little less and adjust after tasting.
Balance it to your whisky and palate. Whisky varies in sweetness, smoke and strength, while lemons vary in acidity. The equal measures of lemon juice and syrup in this recipe make a reliably balanced starting point. If the finished drink is too sharp, add a small splash of syrup; if it is too sweet, add a few drops of lemon juice and shake again briefly with ice.
Choose your ice thoughtfully. Use solid cubes for shaking rather than crushed ice, which melts quickly and can water the cocktail down before it is cold. A single large cube in the serving glass melts more slowly than several small cubes. If serving in a coupe, chill the glass in the freezer for a few minutes while you measure the ingredients.
Do not over-shake or skip the seal check. A firm shake is useful, but continuing well beyond 15 seconds can add excess dilution. Make sure the shaker or jar is closed securely before shaking, and open it pointed away from your face. If using egg white, the dry shake followed by a short shake with ice helps produce foam without requiring extra ingredients.

Serving Suggestions

Serve the whisky sour as soon as it is strained. A rocks glass with one large cube is a good choice when you want the drink to stay cold as you sip; a chilled coupe gives a more concentrated, no-ice serve. A lemon wheel expresses the citrus in the aroma, while a cherry adds a sweet, familiar garnish. The garnish is optional, so do not let the absence of a cocktail cherry stop you making the drink.

This is a fairly bright, spirit-forward cocktail, so it pairs well with salty or savoury nibbles such as roasted nuts, mature cheddar, olives or crisp crackers. Keep snacks simple so they do not overwhelm the lemon and whisky. For a gathering, you can serve smaller portions alongside other drinks, but remember that the recipe contains a full measure of whisky. This cocktail is for adults of legal drinking age; drink responsibly.

Variations

Use a different whisky. Bourbon tends to make a softer, sweeter sour, while a blended Scotch can bring a drier or lightly smoky note. A peated Scotch gives the drink a pronounced smoky character, which can be enjoyable but will be more assertive. Use the same quantity whichever style you choose, then adjust the syrup in small increments to suit the whisky.

Make it without egg white. Leave out the egg white and shake the remaining ingredients with ice for 12–15 seconds. The cocktail will taste much the same but will have no creamy foam. For a plant-based foamy version, use ½ fl oz (1 tbsp; 15 ml) aquafaba, the liquid from a tin of chickpeas, in place of egg white. It can create a similar cap of foam, though it may add a faint bean-like note if used in excess.

Try a New York sour. Make the recipe as written, then slowly pour about ½ fl oz (1 tbsp; 15 ml) red wine over the back of a spoon onto the surface of the strained cocktail. The wine forms a coloured layer and adds a dry, fruity edge. Use a wine you would be happy to drink on its own, and omit the cherry if you want the finish less sweet.

Adjust the sweetness carefully. Simple syrup is made by dissolving equal volumes of sugar and hot water, then cooling it completely. If your syrup is richer or sweeter than a standard 1:1 syrup, begin with ½ fl oz (1 tbsp; 15 ml) and add more only after tasting. Honey syrup can replace simple syrup in the same amount, but it gives the drink a distinct floral flavour and a rounder sweetness.

Storage and Reheating

A whisky sour is best made to order because shaking with ice chills and dilutes it to the right strength, while the egg-white foam gradually settles. Do not store a finished cocktail with ice in the glass; it will become increasingly diluted. If the drink contains egg white, serve it promptly and discard any leftover cocktail rather than keeping it for later.

For convenient preparation, you can combine the whisky, lemon juice and simple syrup without ice or egg white, seal the mixture in a clean container and refrigerate it for up to 24 hours. Refrigerate it within 2 hours of mixing. Add the egg white, if using, only when you are ready to shake and serve. For the freshest flavour, make the lemon juice close to serving time; citrus aroma fades during storage. Shake the chilled pre-mix with ice before straining. A cocktail is not reheated.

Frequently Asked Questions

What whisky is best for a whisky sour?

There is no single required whisky. Bourbon is an approachable choice if you like a rounder, sweeter drink; blended Scotch gives a drier profile, and smoky Scotch makes a more distinctive sour. Start with a whisky you already enjoy neat or in other cocktails. Keep the lemon and syrup measures the same for your first attempt, then adjust the sweetness slightly if the whisky has a particularly strong flavour.

Can I make a whisky sour without egg white?

Yes. Egg white is optional and mainly adds a silky texture and a layer of foam; it is not needed for the drink to taste balanced. Shake the whisky, lemon juice, syrup and bitters directly with ice, then strain as usual. For foam without egg, aquafaba is a practical alternative, although its flavour and texture are not exactly identical.

Is a whisky sour shaken or stirred?

It is shaken. Shaking combines the citrus and syrup thoroughly, chills the whisky and adds controlled dilution. When egg white is included, shaking also builds the foam. Stirring will chill the ingredients less effectively and will not create the same texture, so use a shaker or a clean, tightly sealed jar.

Can I use bottled lemon juice?

You can, but freshly squeezed lemon usually gives a brighter, cleaner flavour. Bottled juice varies by brand and may taste less aromatic or more acidic, so do not assume the full amount will suit your palate. Begin with about ½ fl oz (1 tbsp; 15 ml), taste the balance, and add the rest gradually before shaking the cocktail with ice.

Can I make whisky sours for a party?

Yes. Multiply the whisky, lemon juice and syrup quantities by the number of drinks, mix them without ice, and refrigerate the sealed batch for up to 24 hours. For best texture, shake individual servings with ice as you pour them. Add egg white to each shaker rather than to the stored batch, and do not leave a prepared mixture at room temperature for more than 2 hours.

Why does my whisky sour taste too sour or too sweet?

Lemons differ in acidity, and whiskies differ in sweetness, so the same measures can taste a little different from one drink to the next. If it is too tart, add syrup in small splashes; if it is too sweet, add lemon juice a few drops at a time. Shake briefly with fresh ice after adjusting, then taste again. Small changes are easier to control than adding a large amount at once.

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