What do soluble coffee, ground coffee and the coffee in a coffee capsule all have in common? They have all been roasted.
Roasting is the key step that turns raw green coffee beans into the coffee products you find in shops and restaurants. Roasting determines the overall flavour, body, aroma and acidity of coffee.
The different kinds of roast generally fall under these four broad categories:
A light roast gives a mild taste. It is often used with the best quality beans because it respects the original taste.
A typical medium roast will have more body and less acidity than a light roast.
A full roast is darker, full-bodied, with a well-developed aroma.
Dark roasts are stronger, their smoky-sweet flavour can also be bitter.