Name: Ham Sandwiches
Ingredients: ½ pound ham, chopped fine; 1 tablespoon olive oil; 1 tablespoon lemon juice; pepper to taste; made mustard; bread, buttered

Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Ham Sandwiches

Ingredients

Directions

Prepare

In a bowl, combine chopped ham, olive oil, lemon juice, pepper, and mustard.
Butter the bread before slicing it thinly.

Assemble

Spread the ham mixture between the slices of bread.
Alternatively, spread thin slices of ham with mustard and place between buttered bread slices.

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.

Lemon + peppertop 3% of all pairs

Smell alikestrong

Cooked together27,047 recipes

Shared aroma: trans-2-nonenal (cardboard, fatty).
Ham + breadtop 7% of all pairs

Smell alikemoderate

Cooked together2,536 recipes

Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
Olive + lemontop 7% of all pairs

Smell alikemoderate

Cooked together11,922 recipes

Shared aroma: 3-hexenal (apple, fruity).
Olive + mustardtop 8% of all pairs

Smell alikestrong

Cooked together5,950 recipes

Shared aroma: eucalyptol (eucalyptus, herbal).
Pepper + mustardtop 9% of all pairs

Smell alikemoderate

Cooked together15,430 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

Ham: Provides the main filling and savory flavor of the sandwich.
Olive oil: Adds fat and moisture, helping the ham mixture feel smooth and rich.
Lemon juice: Adds acidity that brightens the flavor of the ham filling.
Mustard: Adds sharp, pungent flavor that contrasts with the rich ham.
Bread: Forms the structure that holds the filling, with butter adding richness.

Swap the lemon

How well each one fits the dish's main ingredients (ham, olive, pepper, mustard, bread):

Lemonthe original
Avocadofits about as well
Limefits about as well
Figfits less well

Fit is the average pairing score against ham, olive, pepper, mustard, 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.