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Preserve

Apple Preserves

A method for preserving tart apples in a sugar syrup, optionally flavored with lemon slices.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Apple and lemon are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 7,551 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Apple Preserves

Ingredients

Directions

Make the syrup

  1. Boil 1 quart of sugar with 2 quarts of water to make a syrup, skimming off any foam.

Prepare and cook the apples

  1. Peel, core, and quarter the apples, placing them in cold water to prevent browning.

  2. Drop a few apple sections into the simmering syrup at a time and cook until tender.

Jar and seal

  1. Carefully skim the apples into jars that are kept in hot water.

  2. Continue adding more apples to the syrup until the jars are two-thirds full.

  3. Fill the jars with hot syrup, add lemon slices for flavor if desired, and seal them like canned fruit.

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 + lemontop 14% of all pairs
    Smell alikemoderate
    Cooked together7,551 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  2. Sugar + appletop 18% of all pairs
    Smell alikelow
    Cooked together16,478 recipes

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

  3. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

Sugar and apple 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

Sugar
Sweetens the fruit and, dissolved in water, forms the syrup that the apples cook in.
Tart apples
Provide the fruit, which softens in the syrup while keeping its shape and tart flavor.
Water
Dissolves the sugar to make the syrup that carries sweetness into the apples.

The step that matters

Preventing browning of cut apples. Cut apple flesh oxidizes and darkens quickly when exposed to air. Holding the quartered apples in cold water slows this reaction, keeping the preserves pale and appealing.

Swap the lemon

The recipe marks lemon as optional. How well each one fits the dish's main ingredients (sugar, apple):

  1. Pearfits better
  2. Vanillafits better
  3. Apricotfits better
  4. Lemonthe original

Fit is the average pairing score against sugar, apple. 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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