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Quince and Apple Preserves

A preserve made by boiling equal parts sweet apples, quinces, and sugar until the fruit turns red and clear.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Apple and quince work together. They rank in the top 1% of all ingredient pairs, and cooks put them together in 506 recipes. Both carry ethyl isobutyrate, which smells fruity, ethereal. The science ↓

Quince and Apple Preserves

Ingredients

Directions

Prepare the fruit

  1. Weigh the sweet apples and quinces.

  2. Pare, quarter, and core the fruit.

Cook the fruit

  1. Boil the quinces in water until tender, then remove them.

  2. Boil the apples in the quince water.

  3. Add the apples to the syrup and boil until they look red and clear, about 1.5 hours.

Jar

  1. Layer the cooked apples and quinces in jars, then pour syrup over them.

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. Apple + quincetop 1% of all pairs
    Smell alikemoderate
    Cooked together506 recipes

    Shared aroma: ethyl isobutyrate (fruity, ethereal).

  2. Apple + sugartop 18% of all pairs
    Smell alikelow
    Cooked together16,478 recipes

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

  3. Quince + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together1,444 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

Apple and sugar barely smell alike, yet cooks put them together in 16,478 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

Quinces
Add natural pectin, helping the preserves set, and firm texture that holds up during long cooking.
Sweet apples
Add pectin and body, softening into the syrup while keeping pieces intact.
Sugar
Adds sweetness and, by binding water, helps preserve the fruit and thicken the syrup.

The step that matters

Cooking the apples in the syrup until they look red and clear. Stop when the apples turn red and clear. Undercooked pieces stay pale and firm, while overcooking breaks them down into mush. As water evaporates, the sugar concentrates, so timing controls both texture and how well the preserves keep.

Swap the quince

How well each one fits the dish's main ingredients (apple, sugar):

  1. Pearfits better
  2. Vanillafits about as well
  3. Apricotfits about as well
  4. Quincethe original

Fit is the average pairing score against apple, sugar. 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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