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Preserved and Condensed Milk

A thick syrup made by evaporating milk and sugar, then sealed in tins.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 2 ingredients
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Why it works: Milk and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 77,875 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Preserved and Condensed Milk

Ingredients

Directions

Make the syrup

  1. Evaporate the milk in a vacuum pan.

  2. Add 12 lb. of cane-sugar to the milk.

  3. Continue evaporating until the mixture thickens.

Tin and seal

  1. Pour the thick syrup into tins.

  2. Seal the tins by soldering to keep out air.

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. Milk + sugartop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

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

Milk and sugar barely smell alike, yet cooks put them together in 77,875 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

Milk
Supplies the milk solids and water that form the creamy body of the finished syrup.
Cane sugar
Adds sweetness and, at high concentration, lowers water activity so the syrup keeps.

The step that matters

Continue evaporating until the mixture thickens. The syrup must lose enough water to become thick and shelf-stable. Stopping early leaves it too wet to keep, while overcooking can make the sugar crystallise or scorch, so the thickening point needs close watching.

“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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