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Arrowroot Custard

A custard made with arrowroot, milk, sugar, egg, and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Arrowroot and vanilla match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 242 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Arrowroot Custard

Ingredients

Directions

  1. Moisten the arrowroot with a little cold milk.

  2. Mix the moistened arrowroot with the boiling milk.

  3. Stir for 3 minutes or until clear.

  4. Remove from heat and add the beaten egg and sugar.

  5. Return to heat and boil for 2 minutes.

  6. Flavor with vanilla.

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. Arrowroot + vanillatop 3% of all pairs
    Smell alikestrong
    Cooked together242 recipes

    Shared aroma: coumarin (sweet, hay).

  2. Milk + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

  3. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

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

  4. Milk + arrowroottop 18% of all pairs
    Smell alikemoderate
    Cooked together817 recipes

    Shared aroma: 2-methylbutyraldehyde (malty, chocolate).

  5. Milk + eggtop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

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

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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

Arrowroot
Starch that thickens the milk into a smooth custard as it heats.
Egg
Adds richness and helps set the custard once it is returned to heat.
Milk
Forms the liquid base that the arrowroot thickens into custard.
White sugar
Adds sweetness to balance the custard.

The step that matters

Return to heat and boil for 2 minutes. Arrowroot thickens when heated, but the egg must be cooked to set and thicken the custard without curdling. Boiling for the stated time gives a thick, cooked result, while stopping early can leave it thin or raw-tasting.

Swap the arrowroot

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

  1. Sweet potatofits about as well
  2. Arrowrootthe original
  3. Capsicumfits less well
  4. Asparagusfits less well

Fit is the average pairing score against milk, sugar, egg, vanilla. 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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