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Dessert

Coffee Mousses

A chilled coffee mousse served in small cases, topped with pistachios.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Pistachio and nuts match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 425 recipes. Both carry alpha-pinene, which smells pine, turpentine. The science ↓

Coffee Mousses

Ingredients

Directions

Prepare

  1. Pin a band of paper around each Eminence case, extending it ¾ inch above the top.

  2. Separate the yolks from the whites of the eggs.

  3. Dissolve the gelatin in the water.

Make the mousse

  1. Whisk the yolks well, then add the sugar and coffee essence.

  2. Add the dissolved gelatin and warm water, whisking well.

  3. Continue whisking over boiling water until frothy and the yolks are cooked.

  4. Allow the mixture to cool but not set.

  5. Whip the cream and whisk the egg whites until very stiff.

  6. Stir the whipped cream and egg whites into the yolk mixture just before it sets.

  7. Fill the Eminence cases with the mixture, allowing it to rise nearly ½ inch above the cases.

  8. Leave in a cool place until fully set.

Unmold and serve

  1. Dip a knife in boiling water, unpin the paper, and gently remove it from the cases.

  2. Sprinkle with chopped pistachio nuts before serving.

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. Pistachio + nutstop 1% of all pairs
    Smell alikestrong
    Cooked together425 recipes

    Shared aroma: alpha-pinene (pine, turpentine).

  2. Cream + gelatintop 7% of all pairs
    Smell alikestrong
    Cooked together1,628 recipes

    Shared aroma: acetic acid (sour, vinegar).

  3. Gelatin + sugartop 7% of all pairs
    Smell alikemoderate
    Cooked together2,778 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  4. Cream + sugartop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

  5. Coffee + nutstop 10% of all pairs
    Smell alikemoderate
    Cooked together105 recipes

    Shared aroma: furaneol (caramel, strawberry).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Eggs
Yolks thicken the custard base and whites add airy lift when whisked stiff.
Cream
Whipped cream adds richness and a light, soft texture to the mousse.
Gelatin
Sets the mousse so it holds its shape when unmolded.
Caster sugar
Sweetens the mousse and helps stabilise the whisked yolks.

The step that matters

Stir in the whipped cream and egg whites just before the mixture sets. If the base is too cold or too set, the cream and whites will not fold in evenly, leaving lumps and losing the airy texture. Folding in at the right moment keeps the foam trapped and the mousse light.

Swap the pistachio

How well each one fits the dish's main ingredients (egg, cream, gelatin, sugar, coffee, nuts):

  1. Almondfits about as well
  2. Pistachiothe original
  3. Hazelnutfits about as well
  4. Walnutfits less well

Fit is the average pairing score against egg, cream, gelatin, sugar, coffee, nuts. 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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