Why it works: Beef and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Meat Loaf
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
Preheat oven to 350°F (175°C).
In a bowl, combine minced beef, minced ham, eggs, bread crumbs, melted butter, pepper, salt, chopped onion, and herbs, then mix all ingredients well.
Press mixture into a brick-shaped tin.
Bake and serve
Cover tin and place it in a pan of boiling water.
Bake for 1.5 hours, ensuring the boiling water does not evaporate.
Let it cool, then turn out and slice.
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.
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Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Ham + breadtop 7% of all pairsSmell alikemoderateCooked together2,536 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
-
Beef + peppertop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Beef or veal
- Provides the main meaty body and structure of the loaf as it cooks.
- Eggs
- Bind the mixture together and help it set firm when heated.
- Bread crumbs
- Absorb juices and moisture, keeping the loaf tender rather than dense.
- Ham
- Adds savoury flavour and extra richness to the meat mixture.
- Melted butter
- Adds fat for moisture and a softer, richer texture.
The step that matters
Bake in a water bath. Placing the covered tin in boiling water surrounds the loaf with gentle, even heat. If the water evaporates, the loaf cooks unevenly and can dry out or set too firmly at the edges.
Swap the onion
How well each one fits the dish's main ingredients (beef, ham, egg, bread, butter, pepper):
- Asparagusfits about as well
- Capsicumfits about as well
- Potatofits about as well
- Onionthe original
Fit is the average pairing score against beef, ham, egg, bread, butter, 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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