Why it works: Peach and lemon work together. They rank in the top 12% of all ingredient pairs, and cooks put them together in 947 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Peach Jam, Ob, Marmalade
Ingredients
Directions
Prepare
Finely flavor and weigh the ripe peaches.
Cook the marmalade
Boil the peaches quickly for 45 minutes, stirring often.
Remove from heat and mix in the powdered sugar.
Skim off any scum and boil briskly for 5 minutes.
Add the strained lemon juice and boil for an additional 3 minutes.
Finish and pour
Pour out the marmalade.
Two minutes after adding sugar, stir in the blanched peach kernels.
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.
-
Peach + lemontop 12% of all pairsSmell alikemoderateCooked together947 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Peach + sugartop 17% of all pairsSmell alikelowCooked together2,308 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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
- Peaches
- Provide the main fruit body, moisture, and fresh peach aroma that the marmalade is built on.
- Sugar
- Adds sweetness and, with the fruit's pectin and heat, helps the marmalade thicken and set.
- Lemon juice
- Adds acidity that brightens the flavor and supports pectin setting.
The step that matters
Boil briskly after skimming. Pectin and sugar only set when the mixture is concentrated by a hard, rolling boil. Boiling too gently leaves the marmalade runny, while overcooking dulls the fresh peach flavor and darkens its colour.
Swap the peach
The recipe marks peach as optional. How well each one fits the dish's main ingredients (sugar, lemon):
- Orangefits better
- Limefits better
- Vanillafits better
- Peachthe original
Fit is the average pairing score against sugar, lemon. 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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