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Baked Onions

Baked onions are parboiled onions topped with cream sauce and bread crumbs, then baked.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Cream and sauce are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 4,787 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Baked Onions

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

  1. Parboil the large onions until they begin to look clear.

  2. Drain the onions and place them in a baking pan.

Bake

  1. Cover the onions with cream sauce.

  2. Sprinkle with bread crumbs.

  3. Bake for 20 minutes at 350°F (175°C).

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. Cream + saucetop 9% of all pairs
    Smell alikemoderate
    Cooked together4,787 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  2. Onion + breadtop 15% of all pairs
    Smell alikemoderate
    Cooked together8,676 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  3. Onion + creamtop 18% of all pairs
    Smell alikelow
    Cooked together10,827 recipes

    Shared aroma: 2-nonanone (fruity, floral).

  4. Onion + saucetop 19% of all pairs
    Smell alikelow
    Cooked together10,474 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  5. Sauce + breadtop 22% of all pairs
    Smell alikelow
    Cooked together4,934 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

Onion and cream barely smell alike, yet cooks put them together in 10,827 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

Large onions
Form the main body of the dish, becoming soft and sweet as they cook.
Cream sauce
Adds moisture and richness, keeping the onions tender while they bake.
Bread crumbs
Sprinkled on top, they toast in the oven to add a golden, crisp layer.

The step that matters

Parboil the onions until they begin to look clear. Partial cooking softens the onion layers so they become tender during baking. Undercooked onions stay firm and sharp, while overcooking makes them fall apart.

Swap the onion

How well each one fits the dish's main ingredients (cream, sauce, bread):

  1. Horseradishfits about as well
  2. Tomatofits about as well
  3. Shallotfits about as well
  4. Onionthe original

Fit is the average pairing score against cream, sauce, bread. 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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