Showing posts with label degas. Show all posts
Showing posts with label degas. Show all posts

Tuesday, November 20, 2012

To Grind or not to Grind, that is the question...

One common question at Chazzano Coffee Roasters is, "Should I grind the beans at home, or should we have you grind them?" I then ask, "How are you brewing the coffee?" And then, "What kind of grinder do you have, a burr or whirly blade?" Who should grind your fresh roasted coffee? The answers are found below.

Grind them at home if:

  • You brew espresso. It is difficult to get an awesome shot if the espresso is not absolutely freshly ground immediately before extraction. Before you buy an expensive espresso machine, make sure you have a quality burr grinder.
  • You enjoy the aroma of freshly ground coffee filling your home with the sweet smell of freshly roasted coffee and....
  • You have a burr grinder that can grind the beans perfectly to the proper consistency for your particular brewing method.


Burr blades grind the coffee bean consistently and do not heat up the grounds. They are more expensive than the whirly blade grinders, but a great grinder is a must for a coffee fanatic.

Whirly blade grinders are cheaply priced, but you get what you pay for. The ground coffee is course on the top, fine on the bottom, and the grounds are warm to the touch. The warmth of the beans is a sign that they are cooking a bit, and therefore there is a chance for a change of flavor profile. Not good for espresso or French Press- not fine or coarse enough!

Let us grind your coffee if:
  • You brew your coffee using either French Press, Pourover, or Drip and your pound of freshly roasted Chazzano Coffee is consumed within 1.5 weeks.
  • You have a whirly blade grinder and the flavor of your coffee will be compromised if you grind it.
  • You're unsure about how to properly grind your coffee at home and fear making a less than perfect cup of coffee.
  • You live with a light sleeper and you don't want to wake them up.

"Is the coffee fresher if I grind it at home or if you grind it for me?" This question also gets asked with this one, "Do the beans need to degas for 1,2,3 days...or can you use them immediately?"


The interesting aspect about freshly roasted coffee is that the flavor profile changes constantly, not wildly, from the time that it is roasted until it's staling after 2 1/2  to 3 weeks. So, bring home a pound of freshly roasted Chazzano Coffee, brew it one way (French Press, Pourover, Espresso) for 7-10 days afterwards and you may enjoy a slightly different cup of coffee each day. The natural flavor components of the coffee continue to break down and morph into different combinations throughout its short, fresh life. Some coffee lovers experience a complete break down of flavor after just one week, others prefer their beans three days after roasting. Do the beans need to degas (expel carbon dioxide) for a few days after roasting? It depends on your palate. In my opinion, not with medium roasted coffee. There are some extremely light roasts that I've felt needed to "breathe" a bit before brewing, but that is rare. My advice is to use the coffee immediately unless you believe that the flavor is preferred after a certain number of days. If you have strong opinions either way, please comment below. Let's discuss it.




Wednesday, August 1, 2007

The Art and Science of Roasting Coffee



For the past two years, I have been roasting with the Micro TostaCaffe from cafecoffees.com. I can roast up to 4lbs. with excellent results. It comes with a puffer module that blows the smoke away from the beans and away from the house. A thermometer is easily used to determine the temperature of the beans. I purchased a Data Acquisition Module that Don Hudson of Cafecoffees developed that allows me to collect data about the roast on my laptop computer with either spreadsheet or graph capabilities. This last piece of equipment has allowed me to repeat favorite roasts more accurately. I prefer this roaster to other excellent roasters on the market because of the large capacity of the drum. It is easy to see the development of the roast both by hearing the cracks (1st and 2nd crack), by the color, and by the smell. Before I attempt to duplicate a favorite roast, I examine my meticulous notes.

Coffee roasting combines both science and art. Each roasting batch has different flavor potentials depending on the temperature- the speed at which it reaches that temperature and the duration of roast at that temperature. If the beans are roasted light, I am sometimes surprised at the complexity of the cup. If the beans are roasted towards full city, the beans now have a different flavor profile. The length of time that the beans degas (release CO2) changes the bouquet (smell of freshly roasted beans) and the aroma (the smell of the brewed coffee). Sometimes coffee beans are best if consumed within 3 days. Sometimes, I forget about a roast and let it sit in vacuum sealed bags for 1 week and I am surprised at how mature the coffee smells. By mature, I mean that the coffee has begun to develop new interesting flavor characteristics. Like wine, coffee can remind you of flavors as diverse as tobacco, flowers, fruit, leather, chocolate, caramel, medicinal (bad), or herbs. In fact, coffee has double the amount of flavor characteristics as wine: 1500 to 750.
There are a plethora of steps to an outstanding cup of coffee. 1. The science of planting the coffee trees with the optimal levels of nutrients in the soil. 2. The care by which the pickers choose the best batch of beans and separate the defects(moldy, insects, debris, unripe, etc.) from the rest of the batch. 3. Shipping the green beans quickly to the coffee roaster. 4. The art of the coffee roaster that brings the freshest and most interesting flavor profile to the coffee. 5. The science of brewing the coffee at 190-195 degrees Fahrenheit with the proper amount of coffee to make sure that the coffee is neither over or under- extracted. 6. Serving the coffee quickly after brewing. There are over 100 steps from the coffee plant to the coffee cup.
Blending different coffees is also an art form. Coffee roasters (people) need to cup their single origin coffees at different degree of roasts to determine what are the characteristics of the particular bean. Beans from Ethiopia, Guatemala, Brazil, Panama, India, Rwanda, Hawaii, Kenya, Costa Rica, Puerto Rico, Sumatra, Indonesia, etc. all have different potential. From one year to the next the quality of the beans from a particular region can increase or decrease. Roasters (people) know what to expect from each of their different beans but there is still a great deal of guesswork and experimentation involved to create an interesting and delicious blend.