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Bitter espresso from Gaggia Cubika... what's wrong?

Postby rhurl on Tue Apr 06, 2010 3:08 pm

Hi guys, I'm new to this forum and looking for some help in brewing a decent espresso with my new coffee machine; Gaggia Cubika.

At the moment I'm using a packet ground coffee from Lidl. I'm loading it into the cup and pressing it down. When the machine tells me it's time to press the button the coffee comes out with very very little or no crema and tastes incredibly bitter.

I am more than willing to learn and I would like to know what you think I'm doing wrong and what I can do to put things right.

I'm not looking for perfection, just a tasty espresso for latte or cappuccino.

Thank you.
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Postby HB on Tue Apr 06, 2010 4:23 pm

Sorry to be the bearer of bad news, but bitter espresso with little crema is consistent with preground coffee. Fresh coffee and a quality grinder are key to good espresso.
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Postby coffeeman on Tue Apr 06, 2010 4:29 pm

Hi there,
Good choice of machine.

There are a few problems that could be causing this. The first thing I would suggest is check your shot time. The crema is extracted in the last part of the extraction. The ideal time is 20-30 seconds. If it's under that (10-15) then I'd suspect it's either not pressed down enough (tamped) or the grind is too coarse. I'm not familiar with the Lidl coffee's but a lot of the pre-ground can be pretty coarse so tamping is key.

I'd suggest going to starbucks and buying from them and when they ask if you want beans or ground say ground and that it's for espresso so can they do quite fine.

There are other things like water temperature etc but I'd try the tamping and the fineness first and see how you get on.

Good luck
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Postby another_jim on Tue Apr 06, 2010 5:37 pm

No amount of tamping, asking at Starbucks, or anything like that will produce drinkable espresso from preground coffee. However, if you have a 1/10th gram scale, and the grind is somewhere close to right, you could try reducing the dose, about a half gram at a time, until the rate of flow is right. This will make the shots less bitter.

Or, in other words: no grinder = no drinkable espresso.
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Postby rhurl on Wed Apr 07, 2010 5:26 am

Thanks guys.

I tried something last night; I put a few spoons of Lidl coffee into a pestle and morter and ground it down much finer. I actually had a pretty good espresso with a much better crema on top.

I note what you say though. Either get freshly ground coffee or grind it myself is the way to go here.

Thanks
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Postby CoffeeOwl on Wed Apr 07, 2010 7:14 am

Grinder!!!
HB wrote:Fresh coffee and a quality grinder are key to good espresso.

another_jim wrote: no grinder = no drinkable espresso.

These are not opinions but truth. If you get freshly ground coffee, it will get stale before you come back home.
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Postby Randy G. on Wed Apr 07, 2010 11:53 am

coffeeman wrote:The crema is extracted in the last part of the extraction. .....

?????
Image


There are other things like water temperature etc but I'd try the tamping and the fineness first and see how you get on.

He has no grinder... Let's start with the obvious possibilities..

PROSECUTOR: Doctor. When you preformed the autopsy were you positive the patient was deceased?
DOCTOR: Yes.
PROSECUTOR: Was there any possibility you were wrong?
DOCTOR: Yes, he could have been a lawyer, but his brain was in a jar on a worktable across the room, so I was reasonably sure he was deceased.
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Postby coffeeman on Wed Apr 07, 2010 4:03 pm

Is that not the crema in the last picture then?

Image

Agreed a grinder is the best thing to get for the freshest possible coffee however a lot of home users I've spoken to are not keen to spend more money on equipment when they first start.

fortunately he seems to have managed to get some crema with his pre-ground by increasing the fineness of the ground with the 'pestle and mortar method'

I'm glad you got your crema in the end rhurl and good luck with other methods.
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Postby CoffeeOwl on Thu Apr 08, 2010 8:35 am

coffeeman wrote:The crema is extracted in the last part of the extraction.

coffeeman wrote:Is that not the crema in the last picture then?

On the pictures it is one hell of terrible extraction, and in the first quotation is one hell of a b$%lsh@!t. Is this a joke or what?!
Let's come back to H-B...
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Postby Whale on Thu Apr 08, 2010 10:03 am

coffeeman wrote:The crema is extracted in the last part of the extraction.


coffeeman wrote:Is that not the crema in the last picture then?


CoffeeOwl wrote:On the pictures it is one hell of terrible extraction, and in the first quotation is one hell of a b$%lsh@!t. Is this a joke or what?!
Let's come back to H-B...


I think that the first quote is a mistake and a little confusion as to the nomeclature, nothing more. This is indicated by the second quote.

No need for any such comment as the third quote. Everyone starts and learn as they go.

Coffeeman, the Crema is the mass of bubbles, and as you can see in your pictures; the bubbles are produced throughout the entire extraction and becomes less dense toward the end.
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