Is there any botulism risk in homemade cold brew coffee? Cold brew coffee is known to be less acidic and it stays airtight in fridge overnight. It's not heated before consumption.
There are news on the internet about a well known coffee producer recalling its coffee cans for botulism risk. Is there any botulism risk in homemade cold brew coffee?
Also, does covering the can that contains cold brew in fridge (overnight) airtight increase botulism or any alike food poisoning risk? Should I cover it or keep it open to decrease the risks?
There's probably a near zero probability to get botulism from home brewed cold coffee if done properly (clean containers/vessels, clean fridge, cold fridge temperature...  )
As long as you keep it cold, it should be ok.
(I've not made a thorough google search)
There at least one report from 2017 of a recall for nitro cold brew; it's pretty much the only report I've seen.
Here's a report of the findings, taken from this reddit thread.
I might have missed it, but it was probably an issue with their processing.