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Pairing

Lemon + Ketchup

A cook's pairing more than a chemical one: 1,447 recipes use both, though they share little aroma. They rank in the top 26% of all ingredient pairs. We hold little distinguishing chemistry for one of them, so the recipe count carries this verdict.

Smell alikelow
Cooked together1,447 recipes
Ranktop 26% of pairs
Try them in the pairing tool Lemon Ketchup
313lemon only 45shared Lemon · 358 Ketchup · 45
Circle size = number of flavor molecules on record. Overlap = molecules they share.
Thin evidence for this pair. We hold no distinguishing chemistry for ketchup: every compound on it appears in more than 10% of ingredients, so this score is computed over the background every food shares. Distinguishing molecules on record: Lemon 120, Ketchup 0 (the typical ingredient has 12).

Do lemon and ketchup go together?

Yes, in practice. 1,447 recipes in our collection combine them, and they share 45 flavor molecules. That places them in the top 26% of every ingredient pair we score.

Read this with the evidence note above in mind.

What they have in common

Almost everything ketchup carries, lemon has too: 45 of ketchup's 45 flavor molecules also occur in lemon. Among the shared key aromas are ethanol (alcoholic, ethereal) and decanoic acid (soapy, waxy). So the pairing rests more on how cooks use them than on shared aroma.

What each one brings

lemon

The herbal side. Herbal notes make up 17% of its labelled aroma molecules, against 5% for ketchup. It carries 313 molecules ketchup doesn't have.

ketchup

The tartness. Sour notes make up 35% of its labelled aroma molecules, against 13% for lemon. Every molecule it carries is also in lemon.

Add a third ingredient

  • Haddock: the best fit for both, top 23% of pairs with lemon, top 1% with ketchup.
  • Whiting: top 22% of pairs with lemon, top 1% with ketchup.
  • Atlantic halibut: top 22% of pairs with lemon, top 1% with ketchup.
  • Sauce: top 30% of pairs with lemon, top 1% with ketchup.

Ranked by the average of its two pairing scores. Only foods used in at least 100 recipes are suggested.

Recipes with lemon and ketchup

We have no browsable recipe that lists both lemon and ketchup.

Can you swap one for the other?

Only partly. Almost all of ketchup's flavor molecules (45 of 45) are also found in lemon, but lemon has 313 that ketchup lacks. Ketchup gives you part of lemon's character without most of its herbal side. This compares flavor only; texture, moisture and the job each does in a dish matter too.

All 45 shared molecules

See every shared molecule grouped by chemical class, with key aromas marked, plus the 313 only in lemon and the 0 only in ketchup.

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Lemon and ketchup questions

Do lemon and ketchup go together?

A cook's pairing more than a chemical one: 1,447 recipes use both, though they share little aroma. They rank in the top 26% of all ingredient pairs. We hold little distinguishing chemistry for one of them, so the recipe count carries this verdict.

What do lemon and ketchup have in common?

Almost everything ketchup carries, lemon has too: 45 of ketchup's 45 flavor molecules also occur in lemon. Among the shared key aromas are ethanol (alcoholic, ethereal) and decanoic acid (soapy, waxy). So the pairing rests more on how cooks use them than on shared aroma.

What goes with lemon and ketchup?

Haddock is the best third ingredient: top 23% of pairs with lemon and top 1% with ketchup. Whiting and atlantic halibut also fit both.

Can I use ketchup instead of lemon?

Only partly. Almost all of ketchup's flavor molecules (45 of 45) are also found in lemon, but lemon has 313 that ketchup lacks. Ketchup gives you part of lemon's character without most of its herbal side. This compares flavor only; texture, moisture and the job each does in a dish matter too.

Compare other ingredients

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Two ingredients gives the full side-by-side breakdown; add a third to see a similarity matrix across all of them (up to 6).

Ranks compare this pair with 20,000 random ingredient pairs on CompKitchen. Molecule counts are what the studies and databases we aggregate have reported for each ingredient: a measure of coverage, not a full census. How we score pairs

Cite this analysis
Plain text
Compound Kitchen (2026). Compound similarity analysis: Lemon vs Ketchup. https://compkitchen.com/compare/lemon-vs-ketchup. Accessed 2026-11-06.
BibTeX
@misc{compkitchen_compare_compound_similarity_analysis_lemon_vs_ketchup_2026,
  title  = {Compound similarity analysis: Lemon vs Ketchup},
  author = {{Compound Kitchen}},
  year   = {2026},
  url    = {https://compkitchen.com/compare/lemon-vs-ketchup},
  note   = {Accessed: 2026-11-06}
}

Methodology DOI: 10.5281/zenodo.19719459 · CC BY 4.0 · Citations are a request, not a requirement.