After using the coffee roaster for quite a while now and being very happy with the results it is time to do some refinement in terms of modifying the taste by various roasting profiles ;)

The questions I want to answer: Experiment No. 1: Find the best roasting time of my favourite green coffee blend. Experiment No. 2: Then using the favourite roasting level from Experiment No. 1 but roast with different profiles, e.g. no preheated vs. preheated drum and roasting temperatures (essentially longer vs. shorter roasts).

Experiment No. 1: Gene Cafe Roaster CBR 101, preheat drum to 250 degrees, roast 3 batches close to my favourite roasting level – with the HasBean Espresso Blend accordingly 16.5 min, 17.5 min (middle of second crack) and 18.5 min at 250 degrees. Cool down externally within 3 min to room-temperature.

The kind of roasting level I prefer from these experiments is just the right balance between not sour but not too (sweet)bitter. Therefore it works out quite well if I stop roasting just with the beginning to middle of the 2nd crack ;)

Experiment No. 2:
After many more roasts I think I have found my ultimate roasting combination for this particular blend. Using the HasBean Espresso Blend, preheat drum at 245 degrees and roast them to just the beginning of the 2nd crack at 245 degrees (here it was 17.5 min).

There is not more to say, one has to experiment with a variety of blends and various temperatures and times. It is a lot of fun and an amazing experience if you taste the difference and find the right balance …