Name: Rhubarb & Custard Sour · Cocktail recipe
Prep time: 5 min
Yield: 1
Ingredients: 50 ml Rhubarb Gin; 25 ml Vanilla Liqueur (or Licor 43); 25 ml lemon juice; 15 ml Sugar syrup; 1 piece Egg White; Ice

Rhubarb & Custard Sour

A tangy rhubarb gin base mellowed with velvety vanilla custard notes, shaken to a silky texture. Inspired by the classic boiled sweet, it balances tart fruitiness with creamy sweetness.

Drink type Servings

Measurement system

About measurement options

Metric (ml): Volumes are shown in millilitres or litres.
US (fl oz, cups and spoons): Uses US fluid ounces, cups and spoons. 1 US fl oz ≈ 29.57 ml.
Imperial (UK and Canada): The UK and Canada share the imperial fluid ounce. 1 imperial fl oz ≈ 28.41 ml. Small volumes are shown in ml.
Bar (parts and dashes): On CocktailFun, 1 part = 30 ml. Dashes stay as dashes. Very small volumes may be shown in ml.

Rhubarb & Custard Sour

Description

The Rhubarb & Custard Sour takes its inspiration from one of Britain’s most beloved retro sweets... the rhubarb and custard boiled sweet. First made popular in the early-to-mid 20th century, these sweets combined the tart, tangy bite of rhubarb with the creamy sweetness of custard for a perfectly balanced flavour. This cocktail transforms that nostalgic combination into a silky, vibrant drink, pairing tart rhubarb gin with smooth vanilla liqueur and a foamy, sour-style finish. It’s a modern mixology homage to a school sweet shop classic.

Ingredients

50 ml Rhubarb Gin
25 ml Vanilla Liqueur (or Licor 43)
25 ml lemon juice
15 ml Sugar syrup
1 piece Egg White
Ice

Instructions

Add rhubarb gin, vanilla liqueur, lemon juice, sugar syrup, and egg white to a shaker (no ice). Dry shake vigorously for 15 seconds to create froth. Add ice and shake again until well-chilled. Double strain into a chilled coupe glass. Garnish with a rhubarb ribbon twist or sprinkle of crushed rhubarb & custard sweets.