Classic cocktail · Guided recipe
Cognac Highball
Start makingTwo and a half parts soda to one of cognac, over as much ice as the glass will take. Carbonation does something useful to brandy, thinning its syrupy weight and pushing the dried-fruit and vanilla notes forward.
In the glassCognac · Soda water
See exact amounts
What goes in
Ingredients

Set up before you pour
Use a highball glass.
The tall, straight shape leaves room for plenty of ice and mixer while keeping a long drink lively.
- Standard size
- 350 ml11¾ oz
- Ice & serve
- Fill it with fresh ice cubes.
- If you don’t own one
- Use a Collins glass or any tall, straight-sided tumbler.
- jigger or measuring spoon
- Cognac45 ml
- Soda water120 ml
From bottle to glass
Method
- 01

Ice the glass Fill the glass with ice
- 02

Measure and pour Pour 45 ml cognac
Cognac
- 03

Top gently Top with 120 ml soda water
Soda water
- 04

Stir around the ice Stir gently to combine
- 05

Finish the drink Finish it — add a lemon slice
Know your drink
About the Cognac Highball

Bubbles against the barrel
Carbonic acid does more than fizz. It nudges the liquid slightly more acidic and carries volatile aromatics up out of the glass, which is why a spirit smells louder in a highball than it does neat. That's the entire argument for putting a well-aged brandy into soda water, and it's also why the ratio matters more than the price of the bottle.
Common questions
Cognac Highball FAQ
Why does mine taste flat and syrupy?
Not enough ice, almost every time. Three or four cubes chill nothing and melt straight into warm sugar water. Fill the glass to the top, keep both the cognac and the soda cold beforehand, and pour the soda gently down a bar spoon.
Should the lemon go in or just over the top?
Squeeze nothing. Express the oils from a peel across the surface and either drop it in or rest it on the rim. Cognac with lemon juice is a Sidecar's business; here the acid fights the oak and leaves the drink tasting thin.
Does day-old soda water matter?
It's the difference between the drink working and not. With two ingredients there's nothing to distract from flat water. Small bottles or cans, opened at the moment of pouring, are worth the extra cost and the extra recycling.
Does it work with brandy that isn't cognac?
Yes. Armagnac gives you more rustic prune and pepper, brandy de Jerez brings sherry-cask sweetness that needs no adjustment, and American brandy runs lighter. Avoid anything labeled simply brandy at the cheap end, because it's usually sweetened.
What ingredients are in a Cognac Highball?
A classic Cognac Highball calls for 45 ml (1.5 oz) Cognac, 120 ml (4 oz) Soda water. That single-serve spec scales cleanly — the recipe above converts it to oz and multiplies it for 2–4 drinks.
How strong is a Cognac Highball?
A standard Cognac Highball is roughly 11% ABV once mixed (before ice melt softens it further). That makes it a relatively light, sessionable drink — similar in strength to a beer.
Is a Cognac Highball shaken or stirred?
A Cognac Highball is built directly in the glass over ice — no shaker required. Add the ingredients in order and give it a brief, gentle stir.
Sharpen the technique
Skills used in this recipe

How to stir a cocktail for a silky finish
Control chilling and dilution without adding the bubbles and texture of a shake.
Read the guide
Cocktail ice: cubes, crushed ice and dilution
Understand why ice is an ingredient—and choose the right shape for every drink.
Read the guide



