It's actually incredibly simple. He picked up an old air popper at Savers for $5.00.

One of these deals. They're ubiquitous in thrift shops. It cooks just like popcorn, only it takes a little longer. When I finish, the house smells amazing.

This roast is a little lighter than the last roast I made. Usually I try to aim for blacker and more oily, but it's sometimes hard to get perfect.

Before and after. I was surprised how small raw coffee beans are.