
I've been hungry for home-brewed coffee, but the only beans in the house were some green sumatra beans a friend gave me a few months back (thanks Ulf!). Undaunted, I whipped out a stainless skillet and roasted about 100g.
Ulf and I had roasted some of these beans a while back, and it turned out fairly well, but I couldn't remember much of the details, so a quick google brought up these
instructions, and I got to work.
First off, I found out that my IR thermometer doesn't work well at all for shiny surfaces. After reporting ~150f, I tossed in the beans, and promptly scorched a good third while they shot up to 300+ degrees. After dropping the heat, grabbing a spoon, and stirring like crazy (which I kept up for the duration), they began to develop color a bit more uniformly. I roasted for 9-10 minutes on medium heat, getting the beans to about 370. I think the majority of the beans hit first crack, and some probably made second crack, but I'm not sure. There are two distinct volumes to the cracks, some are much louder than others--I have no idea if that's based on first vs. second crack, or if some beans just crack louder than others.
Afraid of creating charcoal, I pulled them out and tossed them in a colander outside to blow off chaff and cool them down.


After cooling, they got a trip through the burr grinder. The coarse result looked to have a bit of chaff still (much lighter, brighter bits) but it all went into the press anyway. (about 45g of ground beans--all I need for a pot).
A standard 4-minute brew with ~200 degree water produced a very light pot. The coffee ended up with pretty strong grassy notes but with a refreshing aftertaste. Despite my concerns, it was clearly not over-roasted, so next time I'm definitely going a bit longer--probably 11-13 minutes. I think there's a lot of flavor still in these beans that didn't make it out in the final brew.