When you walk into a coffee shop, or even if you make coffee at home, the smell of the brewing coffee is tantalizing, the clink of the cups and saucers reassuring, and then, the coffee is sitting in front of you and you are taking the first sip… There is NOTHING more disappointing than a mouthful of bitter coffee. It does not matter whether you drink French Press, Espresso-based, Filter based or Extract-based coffee: bitter coffee is a downright “slap in the face”.
And, for some reason, more often than not we seem to think that bitter is normal, that we should accept it, that we are just not “coffee-aficionado ‘ enough to appreciate that bitterness. Since we get served bitter coffee so often it MUST be the norm! People, you cannot be more wrong! Coffee, made with fresh coffee beans, roasted to a great flavor profile by a master roaster, and brewed with the right temperature of water in the right way is NEVER bitter!
And yes, ALL these things can go wrong, from roaster to cup.
• The Roast:
Coffee beans can be over-roasted, to the point that the sugars, which are present in the beans, get carbonized instead of caramelized… it is one thing to roast coffee to a darker profile, but the blackened lumps I have seen in shops marked as “Italian” or “Full City ” roast will surely do a better job as pot-scourer than as the base for a good cup of coffee. A good coffee roaster knows how to preserve the flavour nuances, as well as retain the inherent sweetness of each bean variety.
• The Water
Similarly, a good barista should know what temperature the beans currently int eh grinder need to get the best coffee out of them. Before a new variety is added to the range in the shop, the coffee should be tasted and tasted again, until the perfect temperature settings for that bean have been found. Naturally, if you make coffee at home you can only do so much testing and adjusting, but it pays to check if the water which comes out of your espresso machine is too hot and burns the coffee, which would result in a bitter flavor (it should be 92 degrees Celsius). If you use a filter machine, the same thing can happen, although in most filter machines it is not the water going IN the coffee which is the problem, but the hot plate UNDER the coffee… it is often way too hot and cooks the coffee like an old-fashioned coffee pot on a stove!
• And, then there is “false economy”!
Of-course, coffee is expensive and you should be trying to get the most out of it, but please: that should be “the most flavour”, not “the most brownish, bitter liquid”!! When you start extracting coffee from coffee grinds, the first few millilitres of thick brown liquid have most of the flavour-oils ( and comparative very little caffeine!) As you flush the grinds out further and further, the content of flavoursome coffee oils gets less, but the bitter component remain, resulting in weak, but bitter coffee.
So, if you try to make more cups of coffee than the quantity of grinds can produce you end up with bitter coffee! If you use a French Press and choose to let the coffee sit on the grinds “to get a bit stronger”, you get the same result… the bitterness will increase. So, in short, the rules for sweet, flavorsome coffee are:
1. Fresh coffee beans
2. Properly roasted by someone who knows what he/she is doing
3. Ground to suit the extraction method
4. Extracted with the right water temperature
5. Not over-extracted
6. Kept on a hotplate only for a short time
Courtesy : Robert Booth
