To be fair all you need to actually make cold brew is a pitcher and a cheesecloth or some other filter. The absence of an apparatus does not make it fake.
Chilling warm brewed coffee is definitely faking it. And I presume all places selling "cold brew" is faking it so this guy is losing money by not showing off doing real cold brew with his apparatus.
I’m not talking about chilling warm brewed coffee. All you need to make cold brew coffee is soak coffee grounds in cold water. Whether that is in a mason jar or through a thousand dollar complex laboratory setup is entirely an aesthetic choice.
A woofer from AliExpress is not a speaker with amp you can use for University level audio work. I expect they used something like these: https://www.emerson.com/en-us/automation/branson You cannot 3d print anything in the ultrasonic chain, they need to be machined from specific metal, that's why the horns cost so much.
> A woofer from AliExpress is not a speaker with amp you can use for University level audio work. We're talking about coffee here...
Exactly!
Wars have been fought over coffee, people regularly spend thousands for coffee machines. There are entire companies that exist just to cater to this market.
A woofer from AliExpress is not a speaker with amp you can use for University level audio work. I expect they used something like these: https://www.emerson.com/en-us/automation/branson You cannot 3d print anything in the ultrasonic chain, they need to be machined from specific metal, that's why the horns cost so much.
I looked up "transducer" and it seems to be what you'd need. But! You seem to have found where I was wrong: the horn. The horn seems to be the actual expensive part here. They could start a business I guess selling these en-masse. If anyone has any ideas how a maker could create this within reason please reply.
You can't really sell them in big quantities because they're typically custom to the task. They need to be custom shaped for each application.
Recently I discovered that many coffee shops, maybe half in my sampling of a couple dozen in different cities, are selling cold coffee (brewed hot, then refrigerated) under the name cold brew, and even the ones that actually cold-brew them seem to be under the impression that it needs to be served cold. I was laughed at in one hipster joint for asking for a steamed or warmed cold-brew, and another one initially refus…
As I understand, the serving temperature of coffee does have an effect on perceived acidity (which is NOT the same as pH), though I don't understand the science behind it. Here is one paper that claims it is due to release of volatiles at higher temperatures: https://www.sciencedirect.com/science/article/abs/pii/S03088... If that's correct, then warming the coffee again to that temperature would again speed up the re…
I could buy it, that it might have some perceived effect that’s measurable. I have tasted many a warmed up cold brew, and it tastes like coffee to me. The ones that are actually cold brewed are milder, and the hot brewed fakes are noticeably sharper, and I feel it later in my throat… The thing for me is that the actual acidity of coffee has started causing some inflammation. The reason I’m seeking cold brew is my doctor recommended it. I’m less worried about the perception of acidity and more worried about issues caused by too low pH.
Thank you for saying this. When cold brew first came out, it was promoted as a brewing process that resulted in smoother (I'm guessing lower acidity) tasting coffee. Heating it up seemed natural, and its use in iced coffee seemed simply opportunistic. (In my experience at least). Then it quickly caught on as a novelty, with nitro et al, and when I tell people I drink cold brew warmed I get looks of confusion or turne…
> brew temp and serving temp are orthogonal Yes!!! I’m biting my tongue a little on how infuriating the process has been to ask cafes for warmed cold brews, but you’re spot on and exactly right. I’m baffled that so many people who sell coffee for a living, think they know a lot about it, and act like coffee snobs, don’t seem to understand what cold brew even is. (Or, in a few cases in my sampling I’m certain it was w…
It's funny cuz Charbux has no problem pouring hot espresso into cold ice milk with caramel and cream on top. I think it's pretty clearly just "baristas" justifying not changing their process, which is fine if a bit lazy and argumentative. Many coffee people are totally interested in finding new ways to do stuff, but they have to have the mental space to do it.
Recently I discovered that many coffee shops, maybe half in my sampling of a couple dozen in different cities, are selling cold coffee (brewed hot, then refrigerated) under the name cold brew, and even the ones that actually cold-brew them seem to be under the impression that it needs to be served cold. I was laughed at in one hipster joint for asking for a steamed or warmed cold-brew, and another one initially refus…
I find that heating cold brew reintroduces some of the flavor of hot brewed coffee, though I've never been able to pinpoint a mechanism for it.
Recently I discovered that many coffee shops, maybe half in my sampling of a couple dozen in different cities, are selling cold coffee (brewed hot, then refrigerated) under the name cold brew, and even the ones that actually cold-brew them seem to be under the impression that it needs to be served cold. I was laughed at in one hipster joint for asking for a steamed or warmed cold-brew, and another one initially refus…
As I understand, the serving temperature of coffee does have an effect on perceived acidity (which is NOT the same as pH), though I don't understand the science behind it. Here is one paper that claims it is due to release of volatiles at higher temperatures: https://www.sciencedirect.com/science/article/abs/pii/S03088... If that's correct, then warming the coffee again to that temperature would again speed up the re…
Ah, just posted that I detect a change in flavor after I heat cold brew (but didn't know a mechanism behind it)!
Recently I discovered that many coffee shops, maybe half in my sampling of a couple dozen in different cities, are selling cold coffee (brewed hot, then refrigerated) under the name cold brew, and even the ones that actually cold-brew them seem to be under the impression that it needs to be served cold. I was laughed at in one hipster joint for asking for a steamed or warmed cold-brew, and another one initially refus…
Does cold brew served hot taste good? I have never really considered asking for it hot before simply because I thought it would just be like regular coffee. But, I guess if regular coffee tastes different cold and hot, cold brew should too.