[CoastalCoder]

One coffee phenomenon I'm curious about: why does old coffee get cloudy?

On the day I brew it, it's a dark brown translucent.

But if I leave it in the pot overnight, it's definitely more opaque.

My wife claims it tastes the same as the day before.

[tptacek]

I assume it's just the emulsion breaking.

[ailurooo]

fresh coffee has a distinct taste. Maybe your wife is just used to day old coffee lol

[CoastalCoder]

> fresh coffee has a distinct taste. Maybe your wife is just used to day old coffee lol

I can definitely taste the difference, and I much prefer fresh coffee.

She just can't taste the difference for some reason. Which surprises me, because AFAIK her sense of taste is otherwise normal.

One difference might be that I strongly notice "bitter" and find it unpleasant. Maybe bitterness is one of the key differences in stale coffee?