Six drinks teach nearly every basic idea in mixing. Here are the specs from the International Bartenders Association, plus the reasoning that makes each one work.
Learn the old fashioned, margarita, daiquiri, negroni, martini and manhattan and you have learned most of cocktail structure. Between them they cover the sour, the stirred spirit drink, the equal-parts build and the fortified-wine pairing. Everything else is a variation.
The measurements below follow the International Bartenders Association (IBA) official specifications, given in milliliters. A standard jigger pour of 30 ml is close to one fluid ounce, so 60 ml is roughly two ounces. Treat the specs as a starting point and adjust to your ingredients, since limes, vermouths and whiskeys vary. Whatever you pour, a measured pour beats a guess.
Old fashioned. The IBA spec uses 45 ml of bourbon or rye whiskey, one sugar cube, a few dashes of Angostura bitters and a few dashes of plain water. Soak the sugar with bitters, add the water and muddle until it dissolves, then add ice and the whiskey and stir gently. Finish with orange zest and a cocktail cherry in an old fashioned glass. The drink is whiskey, sugar and bitters, which is the original idea of a cocktail.
Manhattan. The IBA spec is 50 ml rye whiskey, 20 ml sweet red vermouth and a dash of Angostura bitters, stirred with ice in a mixing glass and strained into a chilled cocktail glass, with a cocktail cherry. Many bartenders prefer bourbon or a different vermouth ratio, and that is a matter of taste. See types of whiskey explained for how rye and bourbon differ.
Daiquiri. The IBA spec calls for 60 ml white rum, 20 ml fresh lime juice and two bar spoons of superfine sugar. Stir to dissolve the sugar, add ice, shake and strain into a chilled cocktail glass. Many bars use a measured amount of simple syrup in place of granulated sugar, which dissolves more reliably. The daiquiri is a template: spirit, citrus, sweetener.
Margarita. The IBA spec is 50 ml 100 percent agave tequila, 20 ml triple sec and 15 ml fresh lime juice, shaken with ice and strained into a chilled cocktail glass, with an optional half salt rim. It is a sour with an orange liqueur added, and the same pattern as the daiquiri with a different base. Fresh lime is the single biggest quality lever.
Negroni. Equal parts: 30 ml gin, 30 ml Campari and 30 ml sweet red vermouth, built over ice in a chilled old fashioned glass and stirred softly, garnished with half an orange slice. Equal parts make it easy to remember and easy to scale, which is why it is a favorite for batching. The batching guide uses it as an example.
Dry martini. The IBA spec is 60 ml gin and 10 ml dry vermouth, stirred with ice and strained into a chilled martini glass. The garnish is an expressed lemon peel, or green olives if requested. Drier versions use less vermouth and wetter ones more. Because it has no juice or sugar, the martini depends on cold temperature and careful dilution.
Use the table as a quick reference, and remember that IBA specs are a standard, not a law.
| Cocktail | Core spec (IBA) | Method | Glass |
|---|---|---|---|
| Old Fashioned | 45 ml bourbon or rye, sugar cube, Angostura, water | Build and stir over ice | Old fashioned glass |
| Margarita | 50 ml tequila, 20 ml triple sec, 15 ml lime | Shake and strain | Chilled cocktail glass |
| Daiquiri | 60 ml white rum, 20 ml lime, 2 bar spoons sugar | Shake and strain | Chilled cocktail glass |
| Negroni | 30 ml gin, 30 ml Campari, 30 ml sweet vermouth | Build over ice and stir | Chilled old fashioned glass |
| Dry Martini | 60 ml gin, 10 ml dry vermouth | Stir and strain | Chilled martini glass |
| Manhattan | 50 ml rye, 20 ml sweet vermouth, 1 dash Angostura | Stir and strain | Chilled cocktail glass |
Four mistakes account for most disappointing home cocktails. The first is skipping the jigger and eyeballing, which throws the balance off. The second is using bottled lime or lemon juice, which tastes dull next to fresh. The third is using warm or small, wet ice, which either under-chills or over-dilutes. The fourth is serving in a room-temperature glass, which warms a drink within minutes.
A fifth, subtler error is taking the spec as sacred. Limes differ in acidity, and vermouth varies by brand and by how long the bottle has been open. Taste before you serve, and adjust by a small amount if the drink leans too sour, too sweet or too sharp.
Each classic opens a door. Swap the gin in a negroni for bourbon or rye and you have a different, rounder drink, usually called a boulevardier. Replace the sugar and water in an old fashioned with a spoonful of rich syrup and you have a faster build. Add a different spirit to the margarita template and you start to see how the sour family connects.
That pattern-spotting is the real prize. Once you see that the daiquiri and margarita are the same shape, you can improvise with confidence. The shaken versus stirred guide explains which technique each variation will want.
Make each drink three times and change one thing each time: the ice, the dilution or the proportion. Taste side by side. That small exercise teaches more than reading recipes. A hands-on cocktail class compresses the same learning into one evening.
Cocktails are strong drinks. Pour measured amounts, serve food alongside, offer water and never drive after drinking.
The negroni, since it uses equal parts and needs no shaking or juice. Pour each ingredient over ice, stir and add an orange slice.
Yes. The IBA spec lists rye, but bourbon is widely used and gives a sweeter, rounder drink.
Specs vary between bars and publications. These follow the IBA official recipes, and adjusting to your ingredients and taste is normal.
Yes, at least until you know the proportions by feel. A jigger makes drinks repeatable and keeps strength under control.
Ask about a table, an event date or a class and the operator will reply with what is possible.