Name: To Preserve Blackberries
Ingredients: 7 pounds blackberries; 3 pounds sugar; 1 pint vinegar

Why it works: Sugar and vinegar are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 20,806 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

To Preserve Blackberries

Ingredients

7 pounds blackberries
3 pounds sugar
1 pint vinegar

Directions

Prepare

Combine blackberries, sugar, and vinegar in a pot.
Scald the mixture and let it stand for 24 hours.

Strain and finish

Strain off the juice and scald it again.
Let the juice stand for another 24 hours.
Combine the juice with the berries and scald all together.

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.

Sugar + vinegartop 15% of all pairs

Smell alikemoderate

Cooked together20,806 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

Blackberries: Provide the main fruit flavor, bulk, and natural pectin for the preserves to set.
Sugar: Sweetens the preserves and helps them thicken and keep well.
Vinegar: Adds acidity that brightens the flavor and helps balance the sweetness.

“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.