Roasting Your Own Coffee – On the Stovetop

I roasted my first batch of coffee in a $12 cast iron skillet I already owned, mostly because I didn’t believe the internet forums insisting you needed a real roasting machine to get a decent cup. They were wrong. It’s smokier and more hands-on than any other home roasting method, but it genuinely works, and it’s still the cheapest possible way to find out whether roasting your own coffee is something you actually want to keep doing before you spend money on dedicated equipment.

What you actually need

A heat source (an open gas flame works better than an electric coil or oven), a heavy, flat-bottomed pan, a wooden spoon, a couple of wire mesh strainers or metal colanders, and green coffee beans. Chances are you already own everything except the green beans.

Before you start

Three things worth knowing going in. First, roasting makes a real amount of smoke, so you want a vented hood or an open window, and you should expect your smoke alarm to have opinions about this. Second, once the beans hit first crack, usually somewhere around eight to ten minutes in, things move fast, so have everything laid out and ready before you start rather than scrambling mid-roast. Third, the beans need constant motion the entire time to avoid scorching, similar to stirring a white sauce that can’t be left alone for even thirty seconds.

How to do it

1. Set your colanders or strainers out side by side, within easy reach of the stove.
2. Turn on the heat and let the empty pan preheat until it’s warm, not scorching hot.
3. Measure out about 8 ounces of green beans and dump them into the pan all at once.
4. Stir constantly with the wooden spoon. You’ll watch the beans shift from green to pale yellow and slowly darken, with a grainy, hay-like smell at this stage rather than anything resembling coffee.
5. Listen for first crack, an audible popping sound as trapped steam breaks through the bean’s structure. This is your cue to watch closely, because the color will darken quickly from here.
6. Just before the beans hit the color you actually want, pull the pan off the heat and dump the beans immediately into a strainer. They keep cooking from residual heat even off the burner, so cool them fast by tossing them in the colander or pouring them back and forth between two colanders until they’re cool to the touch.
7. Store the cooled beans in an airtight container.

For a full breakdown of what’s actually happening chemically at each stage, so you know exactly what color, smell, and sound to expect before you hear that first crack, see our guide to the stages of coffee roasting. And if the stovetop method feels like more hands-on smoke than you bargained for, roasting in a hot air popcorn popper is a calmer, more hands-off way to get the same result.