Degree of Roast simply means the roast level of a coffee, how dark it has been roasted.: Degree of Roast simply means the roast level of a coffee, how dark it has been roasted. The longer a coffee is exposed to a constant heated environment, the darker it roasts. One part of roasting consistency is to match degree-of-roast from batch to batch, if that is desired. The second is to match the Roast Profile refers to the relationship between time and temperature in coffee roasting, with the endpoint being the "degree of roast". Roast profiling is the active manipulation of the "roast curve" or graphed plot of More (AKA Roast Curve), the time-temperature relationship that was applied to the roast.