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Dessert

Eclairs with Coffee

A pastry filled with custard and glazed with coffee icing.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Sugar and syrup match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 5,842 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Eclairs with Coffee

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Make the paste

  1. Melt the butter in a pan, then stir in the sugar until combined.

  2. Gradually add the flour, mixing well to eliminate lumps.

  3. Cook the mixture on low heat until it leaves the sides of the pan.

  4. Remove the mixture from heat and let it cool slightly.

  5. Add the eggs one at a time, mixing well after each addition.

  6. Add the zest of orange or lemon.

Pipe and bake

  1. Transfer the paste to a piping bag with a wide plain tip and pipe 4.5‑inch lengths onto a buttered baking sheet lined with parchment paper.

  2. Glaze the eclairs with beaten egg.

  3. Bake in a preheated oven at 350 °F (175 °C) until risen.

  4. Detach the eclairs with a knife and place them on a wire rack to dry in the oven with the door ajar.

Fill and ice

  1. Once cool, gently open the sides and fill with custard.

  2. Brush the eclairs with a thin apricot glaze.

  3. Top with coffee icing made by mixing syrup and strong coffee.

  4. Gradually add glazing sugar to the icing until thick.

  5. Smooth the icing with a palette knife dipped in hot water.

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. Sugar + syruptop 6% of all pairs
    Smell alikestrong
    Cooked together5,842 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Orange + coffeetop 13% of all pairs
    Smell alikemoderate
    Cooked together326 recipes

    Shared aroma: 2,3-butanedione (buttery, creamy).

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  5. Syrup + coffeetop 15% of all pairs
    Smell alikelow
    Cooked together318 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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
Starch that gelatinises with the butter and eggs to give the paste structure.
Eggs
Set during baking and expand with steam to give the eclairs their hollow, airy interior.
Butter
Adds fat for tenderness and richness in the paste.
Sugar
Adds sweetness and contributes to browning in the baked shell.
Syrup
Sweetens the icing and helps it stay smooth and glossy.

The step that matters

Cook the mixture until it leaves the sides of the pan. Cooking drives off water and gelatinises the flour so the paste can hold its shape and trap steam. Under-cooked paste spreads and bakes flat, while the eggs added afterward must be mixed in gradually so the paste stays smooth and stiff enough to pipe.

Swap the orange

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

  1. Vanillafits better
  2. Raisinfits better
  3. Figfits better
  4. Orangethe original

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