U Roast 2

Your Home Coffee Roasting Guide – Because You Should Enjoy the Full Flavour of Freshly Roasted Coffee

You Want to Roast Coffee at Home – Let’s Get it Started


Home Coffee Roasting Methods:

The most popular home coffee roasting methods and techniques can be divided to:

  • Stove-top and Oven Roasting
  • Hot-air (fluid bed) roasters
  • Drum Roasters

Some conditions and variables to be considered before starting the Coffee roasting adventure:

First thing, regardless of the roasting method, you should be aware that roasting process comes with significant quantities of not so pleasant smoke, which increases with degree of roast and the quantity of beans roasted. Therefore, open the kitchen window or turn on an exhaust fan.

Second, the roasted coffee comes with a fine chaff that is lightweight and has a tendency to fly all over the place. So you may want to choose space that can easily be cleaned.

Third, even if you roast inside, you may notice that weather and climate affect your coffee, and you will learn to adjust. Home roasting equipment is very sensitive to temperature. If the weather gets too cold, the roaster won’t heat up properly and this means you may not be able to roast outdoors in the colder months of the year. Something else you should pay attention is the humidity, as it’s also affects home roasting negatively.

Fourth comes the voltage. The electricity voltage fluctuates between 105 and 125 volts. You probably don’t care, but it make great difference for your home coffee roaster – when the first crack will start and if you will be able to roast dark enough.

Now let’s start experimenting with stove-top and oven coffee roasting:

1. Using a Metal Popcorn Popper Whirley Popcorn Popper

The pan looks like normal saucepan with a crank on the top, which turns a metal propeller inside that agitates the coffee beans during the roast. Can be used on gas or on electric burner.

  • Start the process with preheating the pan, until the air inside is heated to around 200 °C.
  • Add the crank and about 1/2 lb of green beans. The temperature will drop to around 170 °C. Do not allow the temperature dropping bellow 150 °C.
  • Stir the crank constantly and watch the beans if moving at the right speed. If the propeller jams, try to free it cranking in the opposite direction.
  • At around 5-6 min. the beans will begin to change their color and you should see some smoke and hear the First Crack. After a minute you should reduce the heat to slow the roasting progress and check frequently for desired color by opening the lid. The Second Crack is supposed to occur in about 10 min.
  • When ready, pour the roasted coffee beans in a colander and shake to remove the chaff. Have in mind that the roasting process will continue some time after the beans are removed from the heat.
  • Leave the coffee for about 12 hours to release the CO2 before storing in airtight glass jar out of direct light.
  • Enjoy!

2. Using Aroma Pot Stove-top Coffee Roaster

  • Similar to the Popcorn Popper, start with preheating the pot at medium heat for a while.

    Aroma coffee roaster

    Aroma coffee roasting pot

  • Open the flap and add 1/2 lb green coffee beans.
  • Close the pot ans start turning the crank clockwise and counterclockwise.
  • Flip the roaster couple of times upside down and continue turning the crank. Shake or flip the roaster if the coffee jams the propeller.
  • If the heat setting is right, the First Crack will occur in 5 min.
  • Turn the crank and flip the pot again, thus keeping the beans moving to roast evenly, until coffee beans reach the desired color.
  • As the beans goes darker, the smoke will be turning darker as well.
  • Turn off the heat, when the beans are a bit lighter than you desire, as they will continue roasting until they cool.
  • When ready, pour the roasted coffee beans in a colander and shake to remove the chaff.
  • Leave the coffee for about 12 hours to release the CO2 before storing in airtight glass jar out of direct light.
  • Enjoy!

It is not normally necessary to wash the roaster after every use. Depending on frequency of roasting, you might wash with very hot water after every dozen or so uses to prevent the coffee oils from building up.

3. Roasting coffee in the oven

A cast iron fry pan can be used to roast green beans in a regular or convection oven.

  • Pre-heat the oven to 220° C. (Lower the temperature if a convection oven.)
  • Place the green coffee beans in the pan in one layer, so that all the beans touch the bottom.
  • Check the beans occasionally for the desired color.
  • The beans should be roasted in less than 15 minutes if your oven temperature is correct. It may take less time in a convection oven.
  • When ready, remove immediately, place in a colander and shake to remove the chaff.
  • Leave the coffee for about 12 hours to release the CO2 before grinding, brewing and storing in airtight glass jar out of direct light.

Reference: Kenneth Davids, Home Coffee Roasting: Romance and Revival

Would love to hear from you about your experience with roasting coffee at home.

Advertisements

Single Post Navigation

2 thoughts on “You Want to Roast Coffee at Home – Let’s Get it Started

  1. Jenny on said:

    Nice article and nice place I want to spend more time with!
    will read your article one by one! Jenny Miao

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: