Name: Columbus Eggs— a Nice Side Dish
Ingredients: 12 hard-boiled eggs; smoked tongue or old lean ham, chopped fine; fresh butter or vinegar, to moisten; black pepper, to taste; coarse sea salt, to taste; mustard, to taste

Why it works: Pepper and mustard are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 15,430 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Columbus Eggs— a Nice Side Dish

Ingredients

12 hard-boiled eggs
smoked tongue or old lean ham, chopped fine
fresh butter or vinegar, to moisten
black pepper, to taste
coarse sea salt, to taste
mustard, to taste

Directions

Prepare the eggs

Peel the hard-boiled eggs and cut them in half, trimming a small piece from one end to help them stand.
Pulverize the yolks and mix with the chopped smoked tongue or ham.

Season and fill

Moisten the mixture slightly with fresh butter or vinegar and season with black pepper, salt, and mustard to taste.
Fill the egg whites with the mixture, pressing down and smoothing it nicely.

Arrange and serve

Arrange the filled halves on a dish, putting two halves together and standing them upright to resemble whole eggs.

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.

Pepper + mustardtop 9% of all pairs

Smell alikemoderate

Cooked together15,430 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ham + mustardtop 14% of all pairs

Smell alikelow

Cooked together747 recipes

Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
Ham + buttertop 16% of all pairs

Smell alikemoderate

Cooked together5,475 recipes

Shared aroma: trans-2-decenal (waxy, orange).
Egg + hamtop 17% of all pairs

Smell alikemoderate

Cooked together4,526 recipes

Shared aroma: 2,4-decadienal (seaweed).
Egg + buttertop 17% of all pairs

Smell alikemoderate

Cooked together118,967 recipes

Shared aroma: decanal (soap, orange peel).

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

What each ingredient does

Eggs: Provide the white shells and rich yolk filling that form the dish's structure and body.
Smoked tongue or ham: Adds savory, smoky flavor to the yolk mixture.
Fresh butter or vinegar: Moistens the yolk mixture so it stays soft and spreadable.

The step that matters

Moisten the yolk mixture lightly. Hard-boiled yolks are dry and crumbly. A small amount of fat or acid softens them and helps the filling hold together and feel smooth. Too much liquid makes the filling loose and hard to shape.

Swap the mustard

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

Capsicumfits better
Asparagusfits about as well
Mustardthe original
Potatofits about as well

Fit is the average pairing score against egg, ham, 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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Columbus Eggs— a Nice Side Dish