So, you started roasting your own coffee, but you still have many questions in your head:
These and other questions regarding the roasting styles may be answered with the following Infographic, based on Kenneth Davids’ book “Home Coffee Roasting”.
What is missing in this Infopraphic is when the bean surface changes from dry to shiny. During the roast stages from Cinnamon to Medium-high/ Regular City the bean surface is dry. From the beginning of the Second Crack (between 225ºC and 230 C°), the beans start to release oil. The surface of the beans become shiny at French/Espresso Roast stage and it gets very shiny at the last stage.
Please note, that beyond this point the coffee is burned and has no body, tastes like charred rubber, the oils are driven off the surface of the bean and the roast is worthless.
Acidity – very important and many times misunderstood. An acidic coffee is brisk and bright. Coffee lacking acidity tend to taste bland and lifeless. Coffees from Yemen, Kenya, Zimbabwe have a typical fruity acidity. The darker a coffee is roasted, the less acidity it has.
Body is a sensation of heaviness in the mouth. As coffee reaches a medium to dark brown roast, body increases, and as it goes to very dark roasts, body decreases again.
Aroma is less developed in very light roasts, gets to its pick in medium to medium-dark roasts, and decreases and simplifies in very dark roasts.
Complexity – represents a wide range of sensation. The pick is reached from medium to moderately dark roasts, used for espresso.
Depth – tricky and subjective term. Describes the resonance or sensual power behind the sensations that drive the taste of the coffee.
Varietal distinction – qualities that distinguish one single origin coffee from another.
Sweetness – in medium-dark through moderately dark roasts the development of sugars combined with the partial elimination of certain bitter flavor components, give the cup a rounded, soft taste and rich body without flatness. Naturally sweeter green coffees (like Brazilian, Guatemalan, Yemeni) make sweeter dark roasts.
Pungency – describe the distinctive, bitter twist that dark roasting contributes to taste. The lovers of dark roasts know and honor this sensation.
Let me know your comments! Do you find my Infographic helpful?
Until next time – Nadia
A perforated cylinder (drum) holds the coffee beans, which are being roasted by direct radiation, conductivity and convection currents of air. The cylinder constantly rotates to evenly distribute the heat across the beans. This method of roasting is the same one used in the commercial coffee roasting.
Now, let’s look at the advantages of drum coffee roasters:
Currently on the Canadian market you will find the following drum coffee roasters at these approximately prices:
Let me know do you own a drum coffee roaster? What is your experience and results?
Hi Coffee Lovers,
This week I want to present you a video that demonstrates the process of roasting green (raw) coffee beans with Fresh Roast SR 300 home coffee roaster (the brother of Fresh Roast SR 500).