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Dessert

Boiled Custard

A sweet custard made by thickening milk with corn starch, eggs, sugar, and flavoring, then served hot.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Vanilla and cocoa work together. They rank in the top 4% of all ingredient pairs, and cooks put them together in 357 recipes. Both carry sotolon, which smells curry, maple. The science ↓

Boiled Custard

Ingredients

Directions

Prepare

  1. Wet the corn starch in a little of the milk.

Make the custard

  1. Heat the remaining milk in a tin pail set in a pot of boiling water until near boiling.

  2. Add the corn starch to the hot milk, stirring constantly until it thickens.

  3. Beat the eggs with the sugar, then add to the mixture, stirring briskly.

  4. Remove from heat and beat well.

Finish and serve

  1. Add flavoring and serve with grated cocoa-nut if desired.

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. Vanilla + cocoatop 4% of all pairs
    Smell alikemoderate
    Cooked together357 recipes

    Shared aroma: sotolon (curry, maple).

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

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

  3. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

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

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

  5. Corn + vanillatop 9% of all pairs
    Smell alikemoderate
    Cooked together1,943 recipes

    Shared aroma: ethyl cinnamate (sweet, balsamic).

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

Milk
Forms the liquid base that the starch thickens and the eggs enrich.
Corn starch
Thickens the hot milk into a smooth, pourable custard as it gelatinizes.
Eggs
Add richness and help set the custard as they cook gently in the hot mixture.
Sugar
Sweetens the custard and balances the flavor of the eggs and milk.

The step that matters

Adding the corn starch to the hot milk while stirring constantly. Starch clumps if it hits hot liquid without constant stirring, leaving lumps. Stirring disperses the granules so they swell evenly and thicken the milk smoothly.

Swap the cocoa

The recipe marks cocoa as optional. How well each one fits the dish's main ingredients (milk, corn, egg, butter, sugar, vanilla):

  1. Almondfits better
  2. Pecansfits about as well
  3. Chestnutfits about as well
  4. Cocoathe original

Fit is the average pairing score against milk, corn, egg, butter, sugar, 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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