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Dessert

Hard Sauce

A lemon sauce made with butter, sugar, flour, water, and lemon juice, cooked until thick.

From an old cookbook · modernised transcription
By Warren, Pa. Presbyterian church. Second auxiliary missionary society. [from old catalog] · From a historical cookbook (Internet Archive) · 11 ingredients
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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 ↓

Hard Sauce

Ingredients

Directions

Make the sauce

  1. Cream 1 cup butter and 1 cup powdered sugar; flavor with Royce's lemon or vanilla.

  2. Mix sugar and flour thoroughly.

  3. Add boiling water.

  4. Cook eight or ten minutes, stirring constantly.

  5. Add the lemon juice and rind.

Finish and serve

  1. Add the butter.

  2. Stir until butter has melted and serve at once.

  3. Beat all together.

  4. Just before using, add 1 pint boiling water.

  5. Never boil sauce after adding lemon, as it makes it bitter.

Nutrition, whole recipe (rough)

696Calories
20 gProtein
18 gFat
112 gCarbs

Counts 5 of 6 ingredients. The other 1 aren't in our nutrition table and add nothing above, so the real totals are higher.

What these numbers assume: 5 portions
IngredientPortion assumedkcal
Flour1 cup (125g) all-purpose455
Butter1 tbsp (14g)102
Egg1 large egg (50g)78
Sugar1 tbsp (12.5g) granulated49
Lemonjuice of 1 lemon (48ml)12
Waternot in our table0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

By Warren, Pa. Presbyterian church. Second auxiliary missionary society. [from old catalog]. 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. See the original page.

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. Flour + eggtop 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. Flour + lemontop 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

Flour
Thickens the sauce as it cooks with the sugar and liquid.
Sugar
Provides sweetness and helps give the sauce its body.
Butter
Adds richness and a smooth, silky texture as it melts into the sauce.
Lemon juice
Adds acidity and bright lemon flavor.

The step that matters

Never boil the sauce after adding lemon. Lemon's acidity and peel oils can turn bitter when held at a hard boil for long, so the sauce should be kept hot but not boiling once the lemon is in.

Swap the lemon

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

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

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