Classic cocktail · Guided recipe

Cognac Highball

Start making

Two 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.

Preparation~2 minSuper easyStrengthLightabout 11% ABVMethodBuilt in glass5 guided stepsIngredients2Tall (highball) glass
Highball

In the glassCognac · Soda water

See exact amounts
Cognac Highball in a tall straight-sided highball glass styled in an intimate cellar salon with limewashed masonry, old oak and tarnished copper.
Make it with guidanceOne clear action at a time, with timers built in.

What goes in

Ingredients

An empty clear highball glass with tall straight sides and a substantial base.
Serving glassHighball glass

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.
Tools to set out
  • jigger or measuring spoon
Compare all glass types
Scale to your tall (highball) glassWe’ll remember this glass size.
  • Cognac45 ml
  • Soda water120 ml

From bottle to glass

Method

  1. 01
    Instructional sketch: Add cubed ice to the highball glass.
    Ice the glass

    Fill the glass with ice

  2. 02
    Instructional sketch: Measure and pour spirit whiskey into the highball glass with cubed ice.
    Measure and pour

    Pour 45 ml cognac

    • Cognac
  3. 03
    Instructional sketch: Top the orange drink gently with mixer carbonated in the highball glass with cubed ice.
    Top gently

    Top with 120 ml soda water

    • Soda water
  4. 04
    Instructional sketch: Stir the orange drink around the ice in the highball glass.
    Stir around the ice

    Stir gently to combine

  5. 05
    Instructional sketch: Finish the orange drink in the highball glass with cubed ice with Lemon Slice.
    Finish the drink

    Finish it — add a lemon slice

Know your drink

About the Cognac Highball

A Sidecar, amber brandy rocks drink and bright brandy highball in a hotel bar.

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.