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Dessert

Chocolate Eclairs

A pastry made from a dough of butter, water, flour, and eggs, filled with chocolate frosting.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Chocolate Eclairs

Ingredients

Directions

The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.

Make the choux paste

  1. Preheat the oven to 400°F (200°C).

  2. In a saucepan, combine butter and water; bring to a boil.

  3. Add flour all at once, stirring until the mixture forms a ball.

  4. Remove from heat and let cool slightly.

  5. Beat in eggs one at a time until smooth.

Bake and fill

  1. Drop spoonfuls of the mixture onto a baking sheet.

  2. Bake for 20-25 minutes until golden and puffed.

  3. Let cool, then fill with chocolate frosting or filling.

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. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Butter + chocolatetop 16% of all pairs
    Smell alikemoderate
    Cooked together10,543 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  4. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  5. Flour + chocolatetop 18% of all pairs
    Smell alikelow
    Cooked together8,994 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

Butter
Adds fat and richness, and helps give the choux dough a tender bite.
Flour
Provides the structure that holds the paste together and lets it puff around the steam.
Eggs
Add structure and moisture, and their water turns to steam that makes the pastry rise.
Chocolate frosting or filling
Adds sweetness and chocolate flavor to the finished éclairs.

The step that matters

Beat in eggs one at a time until smooth. Eggs must be fully incorporated before baking. Adding them gradually lets the paste form a smooth, glossy batter that can stretch and rise; too much egg at once can make it runny and prevent a good puff.

“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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