Why it works: Grapefruit and sugar work together. They rank in the top 26% of all ingredient pairs, and cooks put them together in 309 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓
Grapefruit Marmalade
Ingredients
Directions
Prepare the fruit
Select fine, smooth-skinned grapefruit.
Peel in quarters.
Cover peel with slightly salted cold water.
Free the pulp from pith and seeds.
Cut the pulp finely with sharp scissors.
Place the pulp in an earthenware crock.
Cover with cold water.
Let both peel and pulp stand for 24 to 48 hours.
Drain and rinse the peel in fresh cold water.
Cook and set
Cook the peel in plenty of water slowly until clear and easily pierced.
Boil the pulp in the water it has been standing in.
Add the sugar and stir thoroughly.
Drain the peel.
When cool enough to handle, cut it into very thin strips.
Add the strips to the boiling pulp.
Cook until nearly jellied.
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.
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Grapefruit + sugartop 26% of all pairsSmell alikelowCooked together309 recipes
Shared aroma: beta-damascenone (apple, rose).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Grapefruit
- Provides the peel and pulp, supplying bitterness and acidity that give the marmalade its flavour.
- Sugar
- Sweetens the marmalade and, as it dissolves and concentrates, helps it set into a jelly.
- Cold water
- Softens the peel during soaking and extracts pectin and flavour from the pulp as it boils.
The step that matters
Cook the peel until clear and easily pierced. Peel that is not cooked long enough stays tough and bitter. Slow simmering softens the rind so it becomes tender and translucent in the finished marmalade.
“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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