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Meat Loaf

A loaf made from ground meat, fat, eggs, onion, flour, pepper, salt, and water, baked in the oven.

From an old cookbook · modernised transcription
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Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Meat Loaf

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

  1. Preheat the oven to 350°F (175°C).

  2. In a large bowl, mix the ground meat, fat, beaten eggs, chopped onion, flour, pepper, and salt until well combined.

Bake

  1. Transfer the mixture to a greased pan.

  2. Add 1 pint of water to the pan.

  3. Bake for 2 hours.

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. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Meat + oniontop 17% of all pairs
    Smell alikelow
    Cooked together6,364 recipes

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

  4. Onion + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together32,460 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Flour + peppertop 19% of all pairs
    Smell alikemoderate
    Cooked together50,459 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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

Ground meat
Forms the bulk of the loaf and provides the main savoury flavour.
Eggs
Bind the mixture and help it set firm as they cook.
Flour
Helps absorb moisture and gives the loaf a firmer, more cohesive texture.
Onion
Adds moisture and aromatic sweetness to the meat mixture.
Fat
Adds moisture and richness, keeping the loaf from drying out.

The step that matters

Bake for 2 hours. Ground meat must reach a safe internal temperature throughout the loaf. A long bake at moderate heat cooks the centre fully while the added water keeps the surface from drying out.

Swap the onion

How well each one fits the dish's main ingredients (meat, egg, flour, pepper):

  1. Shallotfits better
  2. Spinachfits better
  3. Capsicumfits better
  4. Onionthe original

Fit is the average pairing score against meat, egg, flour, pepper. 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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