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Prepabation of Geape Syrup

A syrup made by evaporating grape must, neutralizing acidity, and adding eggs, then filtering and bottling.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Grape and egg are a kitchen classic. They rank in the top 30% of all ingredient pairs, and cooks put them together in 4,690 recipes. Both carry (e)-2-octenal, which smells fatty, green. The science ↓

Prepabation of Geape Syrup

Ingredients

Directions

Reduce the must

  1. Pour half of the grape must into a large kettle on the stove, avoiding strong boiling.

  2. Add new liquid as it evaporates, skimming and stirring to increase evaporation.

  3. Once all must is added, skim the liquid and remove from heat.

Neutralize and clarify

  1. Add washed ashes, whiting, or powdered chalk diluted with a little must until bubbling stops.

  2. Stir the mixture until the acid is neutralized.

  3. Use blue paper to test for acidity.

  4. Return the kettle to the stove and add 2 beaten eggs, letting it settle briefly.

  5. Filter the liquid through woolen cloth in a wooden frame.

Finish and store

  1. Boil again to continue evaporation.

  2. Drop syrup from a spoon onto a plate; it should not break or spread.

  3. Pour into an unglazed earthenware vessel and let cool completely.

  4. Transfer to cleaned, dried bottles, cork them properly, and store in a cellar.

  5. Once opened, reverse the bottle neck after each serving and avoid long storage.

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. Grape + eggtop 30% of all pairs
    Smell alikelow
    Cooked together4,690 recipes

    Shared aroma: (e)-2-octenal (fatty, green).

  2. Whiting + eggtop 37% of all pairs
    Smell alikelow
    Cooked together340 recipes
  3. Grape + whitingtop 38% of all pairs
    Smell alikelow
    Cooked together8 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

What each ingredient does

Grape must
Provides the sugars and flavour that concentrate into the syrup as water evaporates.
Washed ashes, whiting, or powdered chalk
Neutralizes the acid in the must so the syrup tastes less sharp.
Eggs
Bind to impurities as they heat, so they can be skimmed or filtered out, clarifying the syrup.

The step that matters

Drop syrup from a spoon onto a plate. Boiling must be stopped at the right concentration. Syrup that is too thin will spread, while overcooking makes it too thick. The drop test checks how the sugar concentration has changed as water evaporated.

Swap the grape

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

  1. Lemonfits better
  2. Limefits about as well
  3. Apricotfits about as well
  4. Grapethe original

Fit is the average pairing score against whiting, egg. 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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