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Brine That Preserves Butter a Year

A method for preserving butter by submerging it in a sugar and saltpetre brine.

From an old cookbook · modernised transcription
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Why it works: Sugar and butter are a kitchen classic. They rank in the top 17% of all ingredient pairs, and cooks put them together in 98,233 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓

Brine That Preserves Butter a Year

Ingredients

Directions

Make the brine

  1. Prepare a strong brine by adding sugar and saltpetre to 3 gallons of water.

  2. Boil the brine, then let it cool and strain it carefully.

Pack and submerge the butter

  1. Pack butter tightly in small jars and pour the brine over it, ensuring it covers the butter by at least 4 inches.

  2. If possible, shape the butter into small rolls, wrap each in muslin, and tie with string.

  3. Place a weight on the butter to keep it submerged in the brine.

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. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Butter
Is the food being preserved, so it must stay fully covered by the brine to keep out air.
Saltpetre
Helps preserve the butter and gives it a cured character during brining.
Loaf sugar
Adds a mild sweetness that balances the strong salt flavour of the brine.

The step that matters

Keeping the butter fully submerged. Any butter above the brine surface is exposed to air, which can encourage spoilage and oxidation. Cooling and straining the brine before use also matters, since hot brine could soften the butter and warm or contaminate it.

“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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