Skip to main content
Sauce

Lemon Butter

A quick lemon butter sauce made with egg, sugar, butter, lemon zest, cornstarch, lemon juice, and water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
Jump to recipe ↓

Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Lemon Butter

Ingredients

Directions

  1. In a bowl, combine the beaten egg and sugar.

  2. Add the butter, lemon zest, and cornstarch or flour; stir well.

  3. Mix in the lemon juice and water.

  4. Boil the mixture briskly for 5 minutes, stirring constantly.

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 + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  5. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Butter and flour barely smell alike, yet cooks put them together in 124,287 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

Eggs
Thickens the sauce as it cooks and adds richness.
Sugar
Sweetens the sauce and balances the lemon's acidity.
Butter
Adds fat for a smooth, rich mouthfeel.
Lemon juice
Provides sharp acidity and bright lemon flavour.
Cornstarch or flour
Thickens the liquid by gelatinising starch when heated.

The step that matters

Boil the mixture briskly for 5 minutes, stirring constantly. The egg must be heated enough to set and thicken the sauce, while constant stirring prevents lumps and scorching on the bottom of the pan. Starch also needs to reach a boil to reach full thickness.

Swap the lemon

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

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

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

You might also like

Hot Lemon Cream SauceHot Lemon Cream Sauce11 recipesWine Sauce (for stewed fruit)Wine Sauce (for stewed fruit)186 recipesCaper SauceCaper Sauce180 recipesBrown SauceBrown Sauce141 recipes