Tricky to roast but better tasting than ever.
Green coffee is decaffeinated before roasting. This process changes the color of the green coffee: it varies from light brown (Natural and CO-2) to green-brown (MC and Swiss Water Process -SWP- decafs).
When thinking about how to make an excellent decaffeinated coffee you have to first focus on the coffee before decaffeination.
A really great decaf shouldn't taste all too differently than before it was processed for decaf.
the world's first caffeine-free coffee