Rum Sour

What it tastes like

Bright citrus balanced by a touch of sweetness. Overall it reads as sour.

Why this recipe works

Shaking is essential here: it chills, dilutes and aerates the citrus so the Rum Sour lands cold, bright and lightly textured. The citrus-to-sweetener ratio is what makes a sour drink balanced — too little of either and it tips into harsh or cloying.

Ingredient tips

• Squeeze lemons the same day you serve. Fresh juice keeps the drink bright; day-old citrus dulls fast.
• Dry-shake (without ice) for 10–15 seconds first, then add ice and shake again — that's what builds the silky foam.
• A standard 1:1 simple syrup works here. For more body, try 2:1 sugar to water and use slightly less.

Common mistakes

• Shaking too briefly. Shake hard for around 10–12 seconds so the drink chills and dilutes properly.
• Reaching for bottled juice. Fresh-squeezed citrus is the single biggest quality jump you can make.
• Skipping the dry shake. Without it you'll get a thin, broken foam instead of a clean cap.

Variations to try

• If it tastes too tart, add sweetener in 2–3 ml increments. Too flat? A few extra drops of citrus usually fixes it.
• Swap simple syrup for honey or demerara syrup to add weight and a darker, richer note.
• No lemon? Try Lime as a substitute (changes the flavour slightly).