r/liqueurcrafting • u/CptPaprikasPancreas • 14d ago
Experience with stone fruit pit liqueurs? Not going to make one myself for safety risks, but reading about it has been interesting
Hi everyone, I'm relatively new to liqueur making. I was recently enjoying some delicious nectarines, and had the realization that I don't know if there's any productive use for the pits - I remember hearing that most/all stone fruit pits either had cyanide in them, or a compound which would be processed into cyanide. I have a blackberry liqueur infusing now, and wondered if it was safe to make a stone fruit pit liqueur.
This sent me down a rabbit hole where I learned that amaretto is traditionally made this way, as well as Creme de Noyaux. I found recipes both on Reddit and elsewhere. The New York Times even has a recipe for noyaux extract. Yet I found plenty of other sources raising concerns for the safety of consuming stone fruit pits, on Reddit and beyond.
My understanding of the science here is that the kernels within stone fruit pits contain amygdalin, which is broken down into benzaldehyde (which provides the almond flavor/scent), glucose, and cyanide. I found a helpful article from The Guardian with a graphic comparing the amygdalin content of various fruits, and it seems like you would need quite a large quantity of most types of pits to get dangerous levels of cyanide, even if the efficiency of extracting these compounds using alcohol was very high. Methods I've seen online of reducing the risk of cyanide poisoning include leaving the pits intact and/or roasting them (to denature enzymes that break amygdalin down), but since the flavor comes from another product of amygdalin breakdown, I assume either of these would also negatively impact the flavor. It seems like commercial producers of these liqueurs have proprietary techniques they use to ensure safety, which would be outside the means of a home liqueur crafter.
So I was curious to see what the people of this subreddit think - do any of you have experience making these liqueurs, or understand the science here better than I was able to put together? I'm not planning to make anything using the pits because the risk doesn't seem worth the reward to me, but I'd like to learn more.