ladalet wrote:The burnt taste partly comes from the fact that the brew temp is high and mostly for the fact that at the end of the extraction as the boiler empties the shrinking volume of water progressively super-heats past the boiling point (because it is under pressure) and eventually turns to steam resulting in burnt coffee. To reduce the burnt taste I recommend slightly overfilling the boiler (2oz should do) beyond the volume of coffee you want to brew. This way when you achieve the volume you desire you can just pull the carafe and let the rest of the water go into the drip tray or a cup before it super-heats. The extra water in the boiler give you a buffer that insures that the water used to extract your coffee will not be the superheated water or steam burning your coffee at the tail end of the brew cycle.
P.S A stovetop moka pot makes way better coffee than a krups steamer and is cheaper to boot.
There are a few tricks to make a steamtoy produce acceptable espresso, and not all of them are good for the machine. The seals on the thing will withstand 180 psi when new, and do it for a coupla years. You can trick 'em into near nine bar, and time them with the steam outlet, and yeah, once you're done they usually aren't. I use the rest of the pressure to steam milk, and let whatever is running thorough the grounds at that point collect in a drip can. I've pulled shots out of those little steamtoys that'd amaze pros. Father Guido Sarducci wasn't overwhelmed, but he was happy (at the time there wasn't anything else available, so we were both making do...)
I'd put my steamtoy up against a mokapot most anytime. Cappuccini at ten paces?