Name: Water Cress Salad Sandwich
Ingredients: Graham bread, sliced; 2 hard-boiled eggs, chopped; ¼ cup watercress, chopped; Coarse sea salt, to taste; 2 tablespoons melted butter; Lemon juice, to taste; Olives, for serving

Why it works: Watercress and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 579 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Water Cress Salad Sandwich

Ingredients

Directions

Make the sandwich

Spread butter on slices of graham bread.
In a bowl, mix chopped hard-boiled eggs, chopped watercress, coarse sea salt, and melted butter.
Squeeze lemon juice over the egg mixture.
Place the mixture between two slices of bread.
Cut the sandwich into a three-leaf clover shape.

Serve

Serve with olives.

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.

Watercress + lemontop 3% of all pairs

Smell alikestrong

Cooked together579 recipes

Shared aroma: coumarin (sweet, hay).
Bread + buttertop 7% of all pairs

Smell alikemoderate

Cooked together27,232 recipes

Shared aroma: delta-decalactone (sweet, creamy).
Lemon + olivetop 7% of all pairs

Smell alikemoderate

Cooked together11,922 recipes

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

Smell alikestrong

Cooked together684 recipes

Shared aroma: coumarin (sweet, hay).
Bread + olivetop 9% of all pairs

Smell alikemoderate

Cooked together1,091 recipes

Shared aroma: 2-undecenal (sweet).

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

What each ingredient does

Hard-boiled eggs: Provide the bulk and creamy, rich filling of the sandwich.
Watercress: Adds a peppery, fresh flavour that cuts through the richness of the egg.
Butter: Adds richness and moisture to the egg filling and coats the bread.
Lemon juice: Adds acidity that brightens the egg mixture and balances its richness.

Swap the lemon

How well each one fits the dish's main ingredients (bread, egg, watercress, butter, olive):

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

Fit is the average pairing score against bread, egg, watercress, butter, olive. 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.