First they should teach Australian baristas what iced coffee is.
Cold brew coffee in 3 minutes using acoustic cavitation
141–150 of 361 posts
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#142Ooh an excuse to upgrade some homelab equipment :-)
(My preferred "weird" coffee is sous-vide: 125g/liter, 2h @ 150f - so you don't leave as much flavor "on the table", but by not getting near boiling you leave more of the bitter compounds behind. Refrigerated but served iced or warmed with boiling water, to taste.)
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#143Anyone ever tried dumping coffee grinds and water into an ultrasonic jewelry cleaner?
Wattage might not be high enough to notice a difference, but might be fun
So I looked at Amazon for products. There's an ultrasonic brewer that is used for both cold brew coffee and also for rapid infusion of spirits with charred barrel staves. There's also a stir plate / french press combo for sale that apparently does fine cold brew in 20 minutes.
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#144Earlier quoted context omitted.
> 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. Me, I'm a tea guy.
A wholly different set of wars
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#145Earlier quoted context omitted.
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.
It’s a market for lemons at this point. Unless you can see an expensive apparatus or observe them soaking the coffee, there’s no way to know if it’s correct, and as a customer it means it’s risky to buy if you care about the difference between refrigerated hot coffee and cold brew.
Unless I'm a visiting tourist I'm likely to go back to a good coffee shop many times. Being surprised my cold brew isn't cold brew - both the caffeine content and taste are tells IMO - for one visit isn't life or death here. I just don't get it again.
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#146Recently 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…
This is an extreme form of coffee hipsterism. “Cold brew, but steamed please”. Brother, this is starting to get ridiculous.
> extreme form of coffee hipsterism
I know a lot of coffee nerds and cold brew is disdained for not extracting enough flavors. This is just someone who never adapted to the world hoping the world will adapt to them.
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#147Earlier quoted context omitted.
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…
As far as I can recall, I've always considered "cold" to apply to the brewing, not the drinking. I learned the technique as "brew extra strong, then add hot water to taste", and that's how I've been doing it since I bought my first cold-brew maker. Where I live we don't get a lot of hot weather, so drinking cold brew cold is strictly a high summer activity for me.
me, too. the Toddy brewer 30 years ago, even spoke of this. It was a way to premake your coffee concentrate, and then mix with water and microwave to heat up....
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#148Earlier quoted context omitted.
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…
Barismo in Cambridge does (or did) a "hot draft" coffee, that is always on tap, is delicious, and is remarkably like hot cold brew. Their method is apparently a secret (although I'm sure more digging could find it), but I wouldn't be surprised if it wasn't basically on-demand heated cold brew. [1] 1. https://www.baristamagazine.com/the-function-and-future-of-b...
Thanks for the tip, I'll hit them up tomorrow!
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#149So, to simplify, we could take a large mason jar and attach to the bottom a magnet and wire coil attached to a power source, and just pump sound waves into a glass jar of water and coffee grounds. Effectively it's a speaker that holds coffee. Should have the same effect
Re: Cold brew coffee in 3 minutes using acoustic cavitation
#150Earlier quoted context omitted.
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…
As far as I can recall, I've always considered "cold" to apply to the brewing, not the drinking. I learned the technique as "brew extra strong, then add hot water to taste", and that's how I've been doing it since I bought my first cold-brew maker. Where I live we don't get a lot of hot weather, so drinking cold brew cold is strictly a high summer activity for me.
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