Name: Cucumber Jelly with Cream Mayonnaise
Ingredients: 3 large cucumbers; ¼ teaspoon pepper; 2 cups water; ¼ teaspoon cayenne; 3 tablespoons granulated gelatine; 1 tablespoon vinegar; 4 drops onion juice; Green food coloring

Why it works: Cucumber and onion match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 6,050 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Cucumber Jelly with Cream Mayonnaise

Ingredients

Directions

Prepare the purée

Peel the cucumbers and cut them into thin slices.
In a saucepan, cover the cucumber slices with half of the water, bring to a boil, and cook until soft.
Force the cooked cucumbers through a purée strainer.

Set the jelly

Dissolve the gelatine in the remaining water and add it to the cucumber purée along with the remaining ingredients.
Color the mixture green and strain it through a double thickness of cheesecloth.
Pour the mixture into a border mold that has been dipped in cold water.
Chill thoroughly, then remove from the mold and place cream mayonnaise in the center.

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.

Cucumber + oniontop 8% of all pairs

Smell alikestrong

Cooked together6,050 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Cucumber + vinegartop 8% of all pairs

Smell alikemoderate

Cooked together4,734 recipes

Shared aroma: 2-methylbutyl acetate (fruit).
Pepper + oniontop 11% of all pairs

Smell alikemoderate

Cooked together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Cucumber + peppertop 12% of all pairs

Smell alikemoderate

Cooked together5,991 recipes

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

Smell alikemoderate

Cooked together18,226 recipes

Shared aroma: acetic acid (sour, vinegar).

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

What each ingredient does

Cucumbers: Provide the main body, flavor and green color of the jelly once puréed.
Gelatine: Sets the purée into a firm jelly that holds the border mold shape.
Vinegar: Adds a sharp acidity that brightens the mild cucumber flavor.
Onion juice: Adds a subtle savory aroma that rounds out the cucumber flavor.

The step that matters

Straining through cheesecloth. Gelatine sets clear and smooth only when the purée is fully strained; leftover fibres or pulp would cloud the jelly and create a grainy texture.

Swap the onion

How well each one fits the dish's main ingredients (cucumber, pepper, vinegar):

Capsicumfits better
Radishfits better
Mustardfits better
Onionthe original

Fit is the average pairing score against cucumber, pepper, vinegar. 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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Cucumber Jelly with Cream Mayonnaise