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Why do parmesan and pineapple share a funky tropical edge?

Aged parmesan and ripe pineapple sound nothing alike. But both are dominated by the same short-chain fatty acids and esters that the dairy industry calls “cheesy” and the fruit industry calls “tropical.”

Butanoic acid
the “rancid butter / parmesan” acid
OAV in parmesan
Threshold: 240 ppb · Aroma: cheesy, sweaty, rancid
Ethyl butanoate
the ethyl ester of that same acid
OAV in pineapple
Threshold: ~1 ppb · Aroma: pineapple, fruity
Methyl butanoate
shorter ester — apple, pineapple, ether-like
OAV in pineapple
Aroma: fruity, sweet, apple, pineapple

Esterification — fatty acid + alcohol — is what converts “cheese funk” into “tropical fruit.” The acid family is the same, just dressed up. This is why parmesan + pineapple actually works on pizza, despite the controversy.

Unlock the OAV numbers

See exactly how far over the detection threshold each compound is — the part of the chemistry that explains why this pairing works. Plus the full ranked list for any ingredient, compound index, and Compare tool.

OAV (Odor Activity Value) = concentration ÷ detection threshold. Numbers above 1 mean the compound contributes detectably to aroma.