If you understand one cocktail ratio, this is the one to know. It will let you build a working drink from almost any spirit, citrus, and sweetener combination in your kitchen. Bartenders call it the sour template, and most of the classic shaken cocktails on every menu in the world descend from it.
The template
Two parts spirit. One part citrus. One part sweetener.
Shake hard with ice. Strain into a chilled glass.
That is it. The full template is sometimes written as 2:1:1, sometimes as 2:0.75:0.75 for drinkers who prefer the spirit to lead a little harder. Some people prefer the "golden ratio" of 2:1:0.75 (more citrus, less sugar) for a drier finish. Any of these works.
What it actually delivers
A well-built sour has three things in balance. The spirit provides character and alcoholic strength. The citrus provides brightness and a clean finish. The sweetener provides body and rounds the harshness of the alcohol. Together they hit three of the five flavour primaries: sweet, sour, and (through the spirit) bitter or umami depending on what you used.
The reason 2:1:1 specifically works is that citrus juice is roughly half as sweet as a 1:1 simple syrup is. So an equal volume of citrus and syrup is balanced, and the spirit at twice that volume is the dominant flavour without overwhelming the balance. The math is older than any of us.
The classic family
Every drink in this list is the 2:1:1 template with one or two small adjustments:
Daiquiri. White rum, lime, simple syrup. The cleanest example of the template.
Margarita. Tequila, lime, orange liqueur (acting as sweetener and providing some orange character). 2:1:1.
Whisky Sour. Bourbon, lemon, simple syrup. Add an egg white for texture.
Sidecar. Brandy, lemon, orange liqueur. 2:1:1, same structure as the Margarita with a different spirit.
White Lady. Gin, lemon, orange liqueur. Same template again.
Pisco Sour. Pisco, lime, simple syrup, egg white, Angostura on top.
Gimlet. Gin, lime cordial. The cordial is acting as both citrus and sweetener; technically 2:1 rather than 2:1:1.
Tom Collins. Gin, lemon, simple syrup, top with soda water.
If you can make one of these, you can make all of them. Swap the spirit, sometimes swap the citrus, occasionally use a different sweetener. The structure stays the same.
The adjustments that matter
Egg white changes the texture dramatically without changing the ratio. A Whisky Sour with egg white is silkier and has a foam head. The egg has no flavour effect.
Bitters on top add a finish. Pisco Sour has Angostura; New York Sour has a red wine float; the addition does not change the underlying 2:1:1 math.
Sweetener type changes the flavour profile heavily. Honey syrup makes a Bee's Knees feel rounder than a White Lady. Maple syrup makes a maple whisky sour read like autumn. Gula melaka makes a sour read distinctly Malaysian. The 2:1:1 ratio still holds, but the personality of the drink shifts.
Citrus type matters more than people think. Lemon and lime are not interchangeable. Lime has higher acidity and more brightness; lemon is mellower and reads more "classic". Substituting calamansi or yuzu shifts the drink toward Southeast Asian or East Asian flavour profiles.
Top with soda turns a sour into a fizz. A Whisky Sour topped with soda is a Whisky Fizz. The proportion of the base stays 2:1:1; you just add length.
Why this is the most-useful ratio at home
Three reasons it is the template we recommend for anyone learning to make cocktails.
You can build it from almost any kitchen. Spirit, lemon or lime, sugar dissolved in water. Done.
You can vary it endlessly. Six base spirits, three citrus options, four sweetener options. That is 72 different drinks from one template.
It teaches calibration. Once you have made twenty 2:1:1 sours, your palate will know what "balanced" tastes like. After that, you can identify exactly when a drink is too sweet or too sour and fix it.
What we use it for at the bar
Most of our shaken cocktails sit on this template. Kopi Sour is bourbon + cold kopi-O + lemon + palm sugar + egg white, which is just a sour with kopi-O acting as a co-flavour element. Junos Sour is whisky + yuzu + lemon + sugar + egg white, the template with two citruses. Pyrus Gimlet is gin + pear + lime + elderflower, the template with pear puree adding body.
When you order a sour-style drink off our menu, what you are actually getting is the bartender's version of the 2:1:1 template adapted to that specific spirit and that specific season. It is the most flexible structural idea in cocktails and the most rewarding one to understand.
One small note for home practice
Use a jigger. Measure exactly. The whole point of the template is the ratio; eyeballing it removes the only structural advantage you have. Buy a 30ml/60ml jigger, use it for the first six months of any home cocktail journey, and then start eyeballing when your hand knows the volumes.
If you want to taste the template properly, come and order a Daiquiri at the bar. It is the cleanest possible expression of the structure. After that, anywhere this template appears (which is everywhere), you will recognise it.
Frequently asked questions
What is the sour template in cocktails?
The sour template is the 2:1:1 ratio of spirit to citrus to sweetener that builds most shaken cocktails. Two parts spirit (60ml), one part fresh lemon or lime (30ml), one part 1:1 simple syrup (30ml). Shake hard with ice and strain. Citrus is roughly half as sweet as simple syrup, so equal volumes balance, and the spirit at twice that lets it lead without overwhelming.
Which classic cocktails use the 2:1:1 sour template?
Most shaken classics: Daiquiri (rum, lime, simple), Margarita (tequila, lime, orange liqueur), Whisky Sour (bourbon, lemon, simple), Sidecar (brandy, lemon, orange liqueur), White Lady (gin, lemon, orange liqueur), Pisco Sour, and Tom Collins. The Gimlet is a 2:1 variant where lime cordial covers both citrus and sweetener. Master one and you can build them all.
Can I substitute honey or palm sugar for simple syrup?
Yes, and the swap changes the drink's personality without breaking the math. Honey syrup gives a Bee's Knees its rounder mouthfeel; maple syrup makes a Whisky Sour read autumnal; gula melaka makes a sour read distinctly Malaysian. Keep the 1:1 dilution (sweetener to water) and the 2:1:1 ratio. The structure holds; the character shifts.
What is the difference between using lemon and lime in a sour?
Lemon and lime are not interchangeable. Lime sits around pH 2.0 to 2.5 and reads brighter, sharper, and faster on the palate. Lemon is mellower at pH 2.0 to 2.6 with a rounder finish and more "classic cocktail" character. Lime suits rum and tequila sours; lemon suits whisky and brandy. Calamansi or yuzu shift the drink toward Southeast Asian or East Asian profiles.
Where can I try sour-template cocktails in PJ?
Order a Daiquiri at Dissolved Solids (43-1 Jalan SS20/11, Damansara Kim, WhatsApp +60 11-4008 7607) for the cleanest expression of 2:1:1. Then try the Kopi Sour or Junos Sour at Soluble Solids (50-1 Jalan SS2/24, WhatsApp +60 11-1682 8651) to see how the template flexes with local citrus and sweeteners. Same structure, different personalities.