Name: Lemon or Orange Syrup
Ingredients: 1.5 pounds white sugar; 1 pint juice of lemons or oranges; peel of lemons or oranges

Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Lemon or Orange Syrup

Ingredients

1.5 pounds white sugar
1 pint juice of lemons or oranges
peel of lemons or oranges

Directions

Make the syrup

Combine 1.5 pounds of white sugar with 1 pint of juice in a pot.
Add some peel and bring to a boil for 10 minutes.

Strain and bottle

Strain the mixture and pour it into a corked bottle.

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.

Sugar + lemontop 18% of all pairs

Smell alikelow

Cooked together53,532 recipes

Shared aroma: 2-nonenal (fatty, green).

Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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

White sugar: Provides sweetness and body, and helps the syrup keep.
Juice of lemons or oranges: Adds bright acidity and the main citrus flavour.
Lemon or orange peel: Adds aromatic citrus oils that scent the syrup.

“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.