Whisky Sour
The Whisky Sour is one of the foundational classic cocktails — whisky, lemon juice, sugar, optionally egg white. Properly made it is balanced, citrus-forward, and one of the most reliably good cocktails you can produce at home with three ingredients.
The Whisky Sour dates to the mid-19th century, with the first published recipe appearing in Jerry Thomas's 1862 'Bartender's Guide'. The egg white version emerged later, originally to soften harsh young whiskies and give the cocktail its distinctive frothy top. It has remained on cocktail menus continuously for over 160 years, which is the strongest possible recommendation a drink can have.
Ingredients
- Whisky50ml
Scotch blend or bourbon both work; Speyside single malt is the upscale option
- Fresh lemon juice25ml
Must be freshly squeezed — bottled lemon juice ruins the drink
- Sugar syrup (2:1 sugar:water)15ml
Or use 1 teaspoon granulated sugar dissolved in the lemon juice first
- Egg white1 (about 15ml)
Optional but recommended — adds body and a foam top
- Angostura bitters2 dashes
Optional, added as a garnish on top of the foam
Lemon twist and a brandied cherry (or maraschino if you must)
Method
- 1
If using egg white: add all ingredients except ice to a shaker and dry-shake hard for 15 seconds to emulsify the egg
- 2
Add ice to the shaker (fill two-thirds)
- 3
Shake hard for 12-15 seconds — you want it properly cold and the egg fully integrated
- 4
Strain into a chilled rocks glass over fresh ice, or into a coupe for the elegant serve
- 5
If using bitters: dash 2 drops of Angostura on top of the foam in a pattern of your choice
- 6
Garnish with a lemon twist and a cherry
Which whisky / spirit to use
The right everyday Whisky Sour Scotch — designed to be mixed, holds up to lemon, doesn't break the bank
If you want a more refined Whisky Sour. The honey-and-apple notes pair naturally with lemon
The bourbon route — slightly sweeter, vanilla-forward, the way the American classic was made
Sherry-cask depth adds raisin and fig notes that work surprisingly well against the citrus
Variations
New York Sour
After shaking and straining, float 15ml of dry red wine (typically Malbec or Shiraz) on top by pouring slowly over the back of a bar spoon. The wine sinks halfway and creates a striking two-tone drink with subtle tannic notes.
Boston Sour
Identical to a standard Whisky Sour with egg white — sometimes the name 'Boston Sour' is used to differentiate the egg-white version from the egg-free version. Both are correct.
Penicillin
A modern classic Scotch sour with ginger and honey instead of sugar, finished with a peated Islay whisky float. Different drink, similar family. See our dedicated Penicillin guide.
Food pairings
- Smoked salmon canapés (the lemon ties the dish together)
- Charcuterie boards
- Fried chicken (a classic American pairing)
- Sharp cheeses — aged cheddar or Stichelton
- Using bottled lemon juice. It tastes flat and slightly bitter; the drink becomes unrecognisable. Always fresh.
- Over-sweetening. The 15ml of sugar syrup is correct for 25ml of lemon juice. More sugar makes the drink cloying.
- Not shaking hard enough. A proper Whisky Sour with egg white needs 15 seconds of vigorous shaking. Half-hearted shaking leaves the drink thin and the egg poorly integrated.
- Using cheap Scotch. Famous Grouse at £20 works; any blend below £15 will produce a harsh drink.
The Whisky Sour is the most reliably good three-ingredient cocktail in the canon. It rewards a slightly better Scotch but doesn't punish you for using a budget blend. The egg-white version is meaningfully better than the egg-free version — make the slightly larger effort.
If someone tells you they don't like whisky cocktails, make them a proper Whisky Sour. The lemon and sugar tame the spirit; the body and texture from the egg white make it feel like a proper drink rather than a flavoured shot. It converts more people to whisky than any other cocktail.
Frequently asked questions
+Is a Whisky Sour better with Scotch or bourbon?
Both are correct — the original 1862 recipe didn't specify. Bourbon Whisky Sours are slightly sweeter (the bourbon's vanilla-corn character pairs naturally with lemon and sugar). Scotch Whisky Sours have more complexity and a drier character. Try both with the same recipe and pick your preference.
+Do I have to use egg white?
No, but the drink is meaningfully better with it. Egg white adds body, foam, and a subtle savouriness that ties the citrus and spirit together. If raw egg is a concern, aquafaba (chickpea brine) is a good vegan substitute — use the same 15ml amount.
+What is dry-shaking and why does it matter?
Dry-shaking means shaking the cocktail without ice first — usually 10-15 seconds — to emulsify the egg white properly. Adding ice immediately would cool the mixture too fast for the egg proteins to denature and create the foam. Dry-shake, then add ice and shake again.
+Can I batch-make Whisky Sours for a party?
Batch the whisky, lemon juice, and sugar syrup together (and refrigerate up to 4 hours ahead) — but add fresh egg whites and shake individually when serving. Pre-batched egg-white mixtures lose their foam structure within 30 minutes.
+What's the difference between a Whisky Sour and a Penicillin?
Both are Scotch sours, but the Penicillin uses honey-ginger syrup instead of plain sugar syrup, and adds a peated Islay whisky float on top. The Penicillin is sweeter, smokier, and more medicinal-tasting. The Whisky Sour is cleaner and more citrus-forward.
Related cocktails
Penicillin
The Penicillin is the only modern classic cocktail that has earned a permanent place on serious cocktail menus worldwide. Created in 2005 by Sam Ross at Milk & Honey in New York, it combines blended Scotch with honey-ginger syrup and lemon juice — then finishes with a 'float' of heavily peated Islay whisky on top. The result is smoky, citrus-bright, spicy, honeyed and entirely its own thing.
Scotch Old Fashioned
The Old Fashioned is the oldest named cocktail still drunk regularly — Scotch (or bourbon, traditionally), sugar, bitters, ice, orange twist. The Scotch version is gentler and more aromatic than its bourbon cousin, but no less classic. Made properly it is the purest expression of what a whisky cocktail can be: spirit, slightly sweetened, slightly bitter, slowly diluted.
Related articles
7 min read
Best Peated Whisky for Beginners: How to Start Without Being Overwhelmed
Peated whisky is divisive — but there's a gentle on-ramp. Six bottles from light to heavy peat, all under £55, that genuinely teach a new palate.
8 min read
Best Scotch Whisky Under £50: The Sweet Spot of Scotch Buying
The £30–50 band is where Scotch quality jumps but price stays sensible. Ten single malts and blends that deliver — gentle Speysides to peated picks.
8 min read
Best Whisky for Beginners UK: An Honest Guide for First-Time Buyers
Eight Scotch whiskies that won't intimidate a first-time buyer — £20–40, widely available in UK supermarkets. Plus what to avoid as a beginner.