Why it works: Vinegar and mustard are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
To Boil Eggs
twelve hard-boiled eggsIngredients
Directions
Prepare the eggs
Bring water to a boil.
Drop eggs into boiling water and let them remain three minutes if you want whites congealed, otherwise a shorter time.
Place silver spoons used for eating eggs into water immediately.
Take twelve hard-boiled eggs, peel shells, cut eggs in equal halves, cutting off a little piece from one end to enable them to stand alone.
Make the filling
Pulverize yolks and finely chop some smoked tongue or old lean ham.
Mix together and moisten slightly with a little fresh butter or vinegar, season with black pepper, salt, and mustard to taste.
Fill and serve
Fill the cups or empty whites with this mixture, pressing down and smoothing nicely.
Arrange them on a dish, putting two halves together and standing them upright, so as to look like whole eggs.
Nutrition, whole recipe (rough)
What these numbers assume: 5 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Egg | 1 large egg (50g) | 78 |
| Black Pepper | 1 tsp ground (2.3g) | 6 |
| Vinegar | 1 tbsp (15ml) distilled | 3 |
| Mustard | 1 tsp (5g) yellow | 3 |
| Salt | 1 tsp (6g) | 0 |
One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.
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. See the original page.
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.
-
Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Egg + mustardtop 28% of all pairsSmell alikemoderateCooked together9,210 recipes
Shared aroma: (e)-2-octenal (fatty, green).
-
Egg + vinegartop 33% of all pairsSmell alikelowCooked together12,922 recipes
Shared aroma: acetic acid (sour, vinegar).
Egg and vinegar barely smell alike, yet cooks put them together in 12,922 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
- Eggs
- Whites form the shell-like cups and yolks become the creamy filling.
- Fresh butter (in the method)
- Adds fat and moisture so the yolk filling stays soft and spreadable.
- Vinegar
- Adds a sharp note and moisture to balance the rich yolk filling.
- Mustard
- Adds sharpness that cuts through the richness of the yolks.
The step that matters
Cutting off a little piece from one end. A small flat cut lets each half stand upright on the dish. Cutting too much exposes the filling, while too little leaves the halves tipping over.
Swap the mustard
How well each one fits the dish's main ingredients (egg, vinegar, pepper):
- Capsicumfits better
- Mustardthe original
- Cucumberfits about as well
- Cabbagefits less well
Fit is the average pairing score against egg, vinegar, 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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