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Lemon or Orange Shrub

A shrub made by mixing sugar, fruit juice, and rum.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Sugar and rum are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 2,908 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Lemon or Orange Shrub

Ingredients

Directions

Prepare the juice

  1. Grate the rind of the lemons or oranges.

  2. Squeeze the fruit to obtain the juice.

  3. Add the sugar to the strained juice and stir until dissolved.

Make and rest the shrub

  1. Mix the juice and sugar with the rum in a cask.

  2. Allow the mixture to stand for 5 to 6 weeks before drawing off.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Sugar + rumtop 14% of all pairs
    Smell alikelow
    Cooked together2,908 recipes

    Shared aroma: beta-damascenone (apple, rose).

  2. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  3. Lemon + rumtop 19% of all pairs
    Smell alikemoderate
    Cooked together1,341 recipes

    Shared aroma: alpha-pinene (pine, turpentine).

Sugar and lemon barely smell alike, yet cooks put them together in 53,532 recipes: they work on texture and structure more than aroma.

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Loaf sugar
Adds sweetness and balances the sharpness of the citrus juice.
Lemon or orange juice
Provides acidity and the bright citrus flavour that defines the shrub.
Rum
Acts as the base spirit, carrying the citrus flavour and preserving the mixture.

The step that matters

Dissolving the sugar fully in the juice. Sugar that stays undissolved will not blend evenly with the juice and rum, leaving a gritty texture and uneven sweetness in the finished shrub.

Swap the lemon

How well each one fits the dish's main ingredients (sugar, rum):

  1. Vanillafits better
  2. Pineapplefits better
  3. Bananafits better
  4. Lemonthe original

Fit is the average pairing score against sugar, rum. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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