That is crazy lol. I don't think anyone actually does this. Most places should be closer to 1:2.Speaking of overly sweet overly milky coffee, I tried to emulate a Vietnamese style drink, which is a short, intense, strong coffee made with a dark roasted robusta (brewed with a phin but I approximated), with sweetened condensed milk, at a 1:1 ratio. Usually it is then shaken with a ton of ice and served with even more ice, but sometimes they just drink it as-is so I tried it as-is and let me tell you that is insane.
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Delicious insanity.
The coffee itself is usually brewed at 1:10.











