I drink bulletproof coffee every morning and I use the upgraded coffee beans. My wife usually uses up the remaining coffee after I've had my 20 ounces or so. Somedays, though, she leaves the house early and never drinks the remaining coffee.
The coffee is made in a Cuisinart pot that has a thermal carafe. The carafe is pretty well sealed I think because, the left over coffee is still noticably warm, but not hot, the next morning. To the extent there is any, I've been using the left-over coffee, thats 24 hours old, in the thermal carafe to make my BPC.
So, how does the makeup of the coffee change? Does caffiene go down? Do the oils go rancid? Do the oils change in a way that would affect blood lipids? Does mold grow in this environment? The left-over coffee is always a bit darker than it was when brewed. It tastes stronger but not bad. The pot does get thoroughly washed out each day.
Anyone else do this? What do you think of the practice?
asked byscottts (2698)
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on March 18, 2013
at 04:07 PM
Is coffee from a Cuisinart safe to drink? Doubtful. French press is the only way to guarantee safety, but that doesn't mean you can remove your hard hat, protective gloves, kneepads and earplugs while you're making it. Sheesh. I know many paleos have no sense of humor, but this lack of common sense is getting on my nerves.
I've drunk a lot of coffee in my life and the only near misses have been from scalds. Knowing that mycotoxins exist is not a good reason to develop an obsessive/compulsive disorder about them.
on February 04, 2013
at 04:32 AM
In the hot summer, I only drink coffee the same day it's brewed. In the winter when it's cooler and drier, I will reheat it the next day.
on January 21, 2013
at 01:08 AM
Well it depends how much you care about such things, but the Bulletproof Exec would say it's no good, and probably covered in mold and mycotoxins that you can't see. I'm sure it won't kill you, but it would probably be better to get some fresh coffee.
on January 20, 2013
at 07:40 PM
The coffee snob in me says that hot coffee needs to be enjoyed within 20 minutes of brewing, that cold brew coffee needs to be consumed within 48 hours of the brew finishing, and that coffee beans for either method need to be used within 10 days of their roast date.
The logical human in me says that if it still tastes fine and isn't molding, you're fine.
on January 20, 2013
at 05:55 PM
I cold brew my coffee at room temperature over 1-2 days, no problems yet!
on January 06, 2013
at 04:27 PM
I think the flavor would probably change, but the coffee would still be fine to drink. If you're going to the expense of actual bulletproof coffee--or any high quality coffee for that matter--I would try to not leave any over. As a once and a while thing, I think you're fine. Though extended time probably has some deleterious effects, I think it is long term exposure to heat that breaks coffee down more than time.
I will occasionally have coffee that is several hours old and it just tastes colder. If I were waiting 24 hours to drink it, and it's a possibility, I would be likely to refrigerate the leftover coffee.
Edit: Found a link on stackexchange asking a very similar question--accepted answer says 1 day left out, 1 week refirgerated. http://cooking.stackexchange.com/questions/17225/how-long-is-it-safe-to-drink-coffee-after-brewed
Another similar question with the general consensus being safe to drink if you can handle the flavor, but don't go much longer than a day. http://www.answerbag.com/q_view/23010