Re: Coffee and Tea Capsules
Also, here's a great article that debunks the Senseo nonsense. Well worth a read.
http://www.bloggle.com/2005/03/the-s...crema-mystery/
The Senseo Crema Mystery
"The machine produced by Philips and Douwe Egberts has been rather aggressively marketed as the “coffee machine with the delicious crema layer”. I have been asked more times than I can count [and I count fairly well… rarely even have to take off my socks] with questions like,
a) is this espresso?
b) is it really crema?
c) if it’s not crema, what is it? and,
d) how does the Senseo make that stuff?
The answers:
Is it espresso? Don’t be silly.
Is it really crema? No. Crema is… well, let’s defer to Dr. Illy:
“Crema, the dense, reddish-brown foam that tops an espresso, is composed mainly of tiny carbon dioxide and water vapor bubbles surrounded by surfactant films. The crema also includes emulsified oils containing key aromatic compounds and dark fragments of the coffee bean cell structure.”
The foam produced by a Senseo is *not* an emulsion; the coffee in the Senseo pod [or pad] is not ground fine enough, nor is the pressure in its brewing great enough to release the non-water soluble oils and lipids to create such an emulsion… and those few oils that *might* be released would be trapped in the filter material of the coffee pod itself. [This is confirmed in left-handed fashion by Philips/Douwe’s FAQ: “The SENSEO coffee brewing process is very efficient leaving hardly any oil in the brew.”]
Further, it’s unlikely that the coffee found in a Senseo pod is fresh enough, or been packaged well enough that the delicate aromatic compounds, or even carbon dioxide — both such an important part an espresso’s crema — remain.
So what is this stuff? It’s *foam*. Bubbles. Mostly air bubbles, and water vapor, and probably some CO2, encapsulated by the brewed coffee solution. Again, it’s not emulsified oils.