by Dogshot on Tue Dec 26, 2006 4:10 pm
Inspired largely by this thread, and Karl's customary eloquence, I decided to try making a cafe crema instead of an Americano this afternoon. It was a delicious experience, and not very difficult.
With the way I grind, I find that a half-turn on the Macap M4 produces roughly .3oz more espresso, so I opened the grinder a full 4 turns past my usual setting for espresso, in the hope of getting somewhere around 5oz (I'm sure it is not linear when making large changes to grind). What I found is that while 17gm of my blend fits nicely in the basket for espresso, when ground more coarsely for cafe crema, it was way too much. I tapped once to updose, and then swept off probably close to 2gm of coffee, so 15gm is probably a better starting point.
The shot took about 20, maybe 22 seconds to brew before blonding, which happened very quickly. As with espresso, I cut the shot once blonding began, and ended with something around 3.5oz, which is about the volume I make for an Americano. The resulting cafe crema was really good, and very different from both espresso and Americano. Before reading this thread, I assumed that a cafe crema would taste like a very poorly brewed espresso, like what you might get from a pbtc, but there was nothing harsh, bitter, or over-extracted about the result. I noticed that brew pressure after preinfusion was just over 8 bar, and fell slightly during the shot.
Next time I will try grinding a bit coarser and using a little less coffee to extend the shot out to 4.5oz, but I doubt I would want to get a beverage much larger than that. What I would really like to know is if the slightly lower (and decreasing) brew pressure is appropriate, or if I should be trying to achieve espresso-level brew pressures.
Any more tips on making a great cafe crema would be appreciated
Mark