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strongsourfruity

Between the Sheets

Cognac, white rum, triple sec and lemon in close-to-equal parts — a strong, citrus-bright Sidecar relative.

Difficulty
medium
Prep time
5 min
Strength
29.3% ABV
Glassware
Coupe glass
Base
brandy
Serves
1

Ingredients

  • Cognac
    20ml
  • White rum
    20ml
  • Triple sec
    20ml
  • Fresh lemon juice
    15ml

Garnish: Lemon twist

Scale for a party

Method

  1. Add the Cognac, white rum, triple sec and lemon juice to a shaker with ice.
  2. Shake hard for 10–15 seconds until well chilled.
  3. Strain into a chilled coupe glass.
  4. Garnish with a lemon twist.

Equipment

Don't have everything? Here's what works instead.

  • Cocktail shaker

    Household swap: A jar with a tight lid works for shaking — hold the lid firmly while shaking.

  • Hawthorne strainer

    Household swap: A slotted spoon held across the shaker opening catches the ice while you pour.

Missing an ingredient?

Each swap below says what it changes and how to correct for it, so you can decide whether you are making this drink or a neighbouring one.

  • Instead of White Rum

    Best substitute: Gold Rum

    This is the base in this drink.

    Flavour impact: Adds a light caramel note and slightly more body in place of white rum's cleaner profile.

    What changes

    Expect more sweetness. Still a good drink, and a slightly different one.

    Sweetness ↑
    The drink will land sweeter, which also makes it read as less sharp and slightly heavier even though nothing else changed.
    Character
    you lose clean, light, subtly sweet and sugarcane-forward, and you gain caramel, oaky, medium-bodied and warm. Numbers can't see this: two ingredients can be identically sour and still smell nothing alike.

    To correct for it

    • Cut the syrup or sugar back — start by halving it and taste before adding any back.
    High confidenceA common bar swap that keeps the drink's overall structure intact.Shifts the drink

  • Instead of Triple Sec

    Best substitute: Orange Curaçao

    This is the modifier in this drink.

    Flavour impact: Adds a richer, slightly bittersweet orange character in place of triple sec's cleaner sweetness.

    What changes

    Expect more bitterness. Still a good drink, and a slightly different one.

    Bitterness ↑
    Bitterness builds across a drink rather than announcing itself, so this will read as a longer, drier finish.
    Character
    Both are orange, and you lose sweet, clean and citrusy, and you gain bittersweet, aromatic and rich. Numbers can't see this: two ingredients can be identically sour and still smell nothing alike.

    To correct for it

    • Pour slightly less, or lengthen the drink a little, and let the sweetness catch up.
    High confidenceA well-established, closely related orange liqueur swap.Shifts the drink

Make it better

  • This drink is genuinely strong — three spirits and only a little citrus — so treat it as a short, slow sipper rather than something to knock back.
  • Use a mid-range Cognac; very cheap brandy tastes thin once shaken with citrus and rum.
  • Shake hard and strain promptly; served up with no ice, it warms fast once poured.
  • Chill the glass in the freezer for a few minutes beforehand — a warm glass takes the edge off a well-made drink fast.
  • Use freshly squeezed citrus juice rather than bottled — the aromatic oils fade fast once juiced, so squeeze just before making the drink.
  • Express the citrus peel by pinching it, skin-side down, over the drink before dropping it in — this releases aromatic oils across the surface.

Rescue this drink

Too strong
Add a 5ml dash of simple syrup and a touch more lemon juice to soften and lengthen it slightly.
Too sweet
Add a touch more lemon juice and reduce the triple sec slightly next time.
Tastes thin
Shake harder and longer — a proper hard shake adds the dilution and texture this drink relies on.
Hard to pin down the flavour
Measure all three spirits carefully with a jigger; small imbalances are easy to taste in a three-spirit drink like this.
You cannot smell itgeneral guidance
Most of a drink's aroma is on top of it, not in it. Squeeze the peel skin-side-down over the surface before dropping it in — the oil should visibly spray. A twist placed in the glass without being expressed contributes almost nothing. Aroma also fades fastest of anything in a drink, so garnish at the moment of serving rather than in advance.
Shaken too longgeneral guidance
Ten to fifteen seconds is a full shake. Beyond that the ice fractures and keeps diluting while you are still working, so the drink arrives cold, thin and slightly foamy when it should be sharp. Shake hard and briefly rather than gently and long — the two are not interchangeable.
Too sourgeneral guidance
Add a little more sweetener (simple syrup or the cocktail's usual sweetening ingredient), a small amount at a time.
Served too warmgeneral guidance
Chill the glass, ice and every ingredient ahead of time — a warm pour is the fastest way to lose a cold drink's balance. For one serving, there's no real fix beyond rebuilding it properly chilled; for a batch, keep everything refrigerated until the moment of serving and add ice last.
Over-diluted (tastes watery)general guidance
Likely shaken too long, or with too much ice surface area. For one serving there's no fixing it after the fact — rebuild with fewer, larger ice cubes and a shorter shake. Planning a batch? Shorten the ice-contact time across the whole round, not just this glass.
No cocktail shakergeneral guidance
A jar with a tight lid works for shaking — hold the lid firmly while shaking.
No cocktail strainergeneral guidance
A slotted spoon held across the shaker opening catches the ice while you pour.

Make ahead & storage

Batch the base, finish at serving

Batch the 3 stable components days ahead and add fresh lemon juice when you pour.

Add about 27% water to the batch to replace what the ice would otherwise contribute, or it will pour noticeably harsher than a fresh one.

Fresh lemon juice:
Fresh citrus loses its aroma within hours and turns dull. Squeeze it on the day.

What it tastes like

The taste, and what drives it

off-dry, sharp, light — a sour-structured drink served straight up, no ice.

Off-dry

Dry → Sweet

Sweetened enough to take the edge off without reading as a sweet drink.

What drives it: Triple sec — carries the most sugar into the glass.

Sharp

Soft → Sharp

Properly sharp. This is the axis the drink is built on.

What drives it: Fresh lemon juice — supplies the acidity.

Light

Light → Rich

Light-bodied. It refreshes rather than satisfies, which is usually the intention.

What drives it: Cognac — adds most of the weight.

Very bold

Delicate → Bold

Very bold — concentrated, and served small for that reason.

What drives it: Cognac — is the most concentrated thing in the glass.

What you smell first

  • Citrus peelLeadsBefore the first sip

    From Triple sec, Fresh lemon juice, Lemon twist

  • Orchard fruit

    From Cognac

Aromas marked as sitting above the drink reach you before the first sip — skipping that garnish changes the drink more than its size suggests.

How it was worked out

Each reading comes from the recipe's own recorded taste scores combined with what each ingredient contributes, weighted by how much of it is in the glass. Almost everything in this drink has detailed ingredient data behind it.

How balance actually works →

If it isn't right

What goes wrong with this drink, and why

Only the faults this particular recipe is actually prone to — each with the likely cause, the adjustment, and what the adjustment costs you.

  • It's too sweet

    Likely cause
    Triple sec is carrying the sugar here, and it is the easiest thing in the drink to over-pour — syrup clings to a jigger and a "splash" is rarely the same twice.
    What to change
    Cut triple sec by about a third and rebuild. If it is already made, a squeeze of citrus is faster than starting again.
    What that does
    The drink will read sharper as well as less sweet, because the acid stops being balanced. That is usually the intention, but it is a bigger change than it sounds.

  • It's too sour

    Likely cause
    Fresh lemon juice varies more than any other ingredient in the drink. Limes differ by weeks of ripeness, and a sharp one can be half again as acidic as a mild one at the same measure.
    What to change
    Add sweetener a few millilitres at a time rather than diluting — you are correcting a ratio, not a concentration.
    What that does
    Sourness recedes and the drink gains a little weight. Overshoot and you will be reading the too-sweet entry above instead.

  • It's too strong

    Likely cause
    Cognac dominates by design here — this is a drink built to be sipped, and it is under-diluted more often than it is over-poured.
    What to change
    Shaking for longer, or add a measured 5–10ml of water. Both are the same correction; one is just more honest about it.
    What that does
    Alcohol heat drops and the aromatics open up — a slightly diluted spirit-forward drink usually smells better, not worse.

  • It's watery

    Likely cause
    Shaking adds water while it chills, and the two cannot be separated. Wet ice from a freezer door, or small cubes, will over-dilute before the drink is properly cold.
    What to change
    Use bigger, drier, colder ice and stop sooner. Chilling the glass first buys you time you would otherwise spend diluting.
    What that does
    More flavour concentration at the same temperature. Under-dilute instead and the drink will taste harsh — this is a target, not a direction.

  • It doesn't smell of anything

    Likely cause
    The aroma you are missing is probably citrus peel, which sits above the drink rather than in it — skipping or under-expressing the garnish removes it entirely.
    What to change
    Express the peel over the surface with the skin facing the drink, then drop it in. Herbs go in the glass, not on the side.
    What that does
    Aroma arrives before flavour does, so the whole drink reads as more intense without a single measure changing. The oil does land in the drink, though — an over-expressed peel adds a faint bitterness to the first mouthful.

  • It tastes one-dimensional

    Likely cause
    With 4 components there is nowhere for complexity to hide — a sour-structured drink is exposed by design, so a dull one is usually a dull ingredient rather than a missing step.
    What to change
    Change the quality of what is there before adding anything new: fresh citrus rather than bottled, a better base bottle, a dash of bitters. Bitters add layers at a scale nothing else matches.
    What that does
    More going on at the same strength and sweetness. Adding a whole extra ingredient instead usually produces a muddier drink rather than a deeper one.

Taste profile

Sweetness
2/5
Sourness
3/5
Bitterness
0/5
Strength
5/5
Fruitiness
2/5
Freshness
1/5
Creaminess
0/5
Smokiness
0/5

Nutrition & alcohol

Estimate onlyBased on standard 20ml pours; shaken and strained without additional dilution figured in beyond the shake.
Calories
150 kcal
Sugar
7 g
Carbohydrates
8 g
Alcohol units (UK)
2.2
US standard drinks
1.24
ABV
29.3%
Serving size
75 ml
Show calculation assumptions

Source: Calculated from standard measures

Calorie breakdown: ~121 kcal from alcohol, ~29 kcal from sugar and mixers.

Likely range: 113–188 kcal, reflecting the confidence level above — not a lab-measured figure.

Assumes 20ml each of Cognac and white rum (both 40% ABV) and 20ml triple sec (30% ABV), plus 15ml fresh lemon juice.

These figures are estimates, not laboratory measurements — individual tolerance to alcohol varies. See our responsible drinking guidance.

Variations

  • Untitled (Dry) Between the Sheets

    Reduce the triple sec to 15ml and add 5ml extra lemon juice for a drier, more citrus-forward pour.

  • Golden Sheets

    Use gold rum and orange curaçao in place of white rum and triple sec for a deeper, more caramelised version.

What kind of drink this is

The structure behind the recipe

A shaken build: a sour-structured brandy-based drink, served straight up, no ice — light and lively in the mouth.

Sour-structured

Something sour and something sweet held in balance over a base — the structure behind the whole sour family and everything descended from it.

  • Base

    Cognac

    White rum

  • Modifier

    Triple sec

  • Sour element

    Fresh lemon juice

Drinks built this way are collected as the Sour family.

Technique

shaken

Ice is thrown against the liquid and against itself, chipping fragments off and driving air through the mix. Chilling, dilution and aeration all happen at once and cannot be separated.

A lighter, briefly frothy body and a cloudy appearance that settles as it stands. The aeration blunts alcoholic heat, which is why a shaken drink tastes softer than a stirred one of the same strength.

What it ruins: Clarity, and any carbonation. A shaken spirits-only drink arrives cloudy with ice shards floating in it, and shaking anything fizzy is the one rule with no exceptions.

Everything about shaking →How the technique works →

Dilution

During mixing, then strained

Water from ice typically makes up around 30% of the finished drink for a shaken build (commonly 25–35%). Dilution is an ingredient here, not a side effect.

Why dilution is an ingredient →

Served

Straight up, no ice

Coupe glass · 75ml

Chilled during mixing and then strained away from the ice, so it arrives at its coldest and most concentrated and warms from the first sip — which is why 75ml is the right size for it.

Texture and aroma

Light and livelyLemon twist

Shaking whips air through the drink, giving a lighter, briefly frothy body that settles as it stands.

Aroma arrives before flavour does. A citrus twist is expressed over the surface so its oils sit on top of the drink — skipping it changes the drink more than its size suggests.

Where to go from here

Each of these is here because of something specific about this drink, not as a standard set of links.

Where it comes from

Origin and family

Origin of the Between the Sheets

A Prohibition-era cocktail, likely created in a Paris or London bar in the 1920s alongside the Sidecar.

Family

Sour

2 parts spirit · 1 part citrus · 1 part sweetener — shaken, strained, served up or over ice.

1920–1933Other prohibition era drinks →

On drinks history

Cocktail origin stories are frequently repeated and rarely evidenced. Our history section separates what is documented from what is folklore rather than picking whichever version reads best.

History and culture →

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Related tools

Scale this for a party

Work out bottles, mixers, ice and total alcohol units for any number of guests.

Recipe confidence

A well-documented classic with a consistently agreed equal-parts-plus-lemon recipe.

High confidence