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Lemon Paste to Keep

A preserved lemon paste made from butter, sugar, eggs, lemon rind, and lemon juice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Butter and lemon are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 41,227 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Lemon Paste to Keep

Ingredients

Directions

  1. In a pan, combine butter, sugar, eggs (reserve 2 egg whites), lemon rind, and lemon juice.

  2. Simmer the mixture until the sugar dissolves and it thickens to a honey-like consistency.

  3. Transfer the paste into airtight pots and seal them.

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. Butter + lemontop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Butter + sugartop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

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

  5. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

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

Butter
Adds richness and a soft, smooth texture to the paste.
Sugar
Sweetens the paste and, once dissolved, helps it thicken to a honey-like body.
Eggs
Thicken the paste as they cook and add richness.
Lemon juice
Adds sharp acidity that balances the sweetness.
Lemon rind
Adds aromatic oils that give the paste its bright lemon fragrance.

The step that matters

Simmering until the paste thickens. Sugar and egg proteins thicken only with enough gentle heat; too little leaves the paste runny, while too much heat can scorch the sugar and eggs on the bottom of the pan.

Swap the lemon

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

  1. Vanillafits better
  2. Lemonthe original
  3. Raisinfits about as well
  4. Figfits about as well

Fit is the average pairing score against butter, sugar, egg. 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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