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To Stew Spanish Onions White

Stewed Spanish onions served with a white sauce of butter, milk, and mace.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

To Stew Spanish Onions White

Ingredients

Directions

Cook the onions

  1. Peel the Spanish onions and tie them in a piece of muslin.

  2. Boil the onions in water with a little coarse sea salt until tender, about 1 hour. Check doneness by inserting a fork.

  3. Remove the onions, untie the muslin, and place them on a serving dish.

Make the sauce and serve

  1. In a saucepan, melt butter and mix with milk instead of water, adding pounded mace and a pinch of salt.

  2. Pour the sauce over the onions and serve hot.

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. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  2. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Onion + macetop 17% of all pairs
    Smell alikelow
    Cooked together7,078 recipes

    Shared aroma: eugenol (clove, spicy).

  4. Milk + macetop 17% of all pairs
    Smell alikelow
    Cooked together3,346 recipes

    Shared aroma: sabinene (woody, terpenic).

  5. Onion + milktop 20% of all pairs
    Smell alikemoderate
    Cooked together13,418 recipes

    Shared aroma: hexanal (green, grassy).

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

What each ingredient does

Spanish onions
Become tender and sweet when boiled, forming the main body of the dish.
Butter
Adds richness and a smooth, silky texture to the sauce.
Milk
Forms the base of the white sauce, adding creaminess and body.

The step that matters

Boiling the onions until tender. Onions need a long, gentle simmer to soften fully. Stopping early leaves them firm and sharp, so a fork test confirms they are cooked through before saucing.

Swap the mace

How well each one fits the dish's main ingredients (onion, butter, milk):

  1. Garlicfits better
  2. Cinnamonfits better
  3. Thymefits better
  4. Macethe original

Fit is the average pairing score against onion, butter, milk. 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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