How to Roast Coffee Beans at Home: A Beginner's Guide

Roasting coffee at home is easier than most people think. With a bag of green coffee and simple equipment you probably already own, you can roast a fresh batch in about 15 minutes and taste coffee at its absolute peak. This guide walks you through everything you need to get started.

Why roast your own coffee?

• Peak freshness: you control exactly when your coffee is roasted.
• Your roast, your way: stop at the exact roast level you like, from bright and light to rich and dark.
• Green coffee keeps: unroasted beans stay stable for months when stored properly, so you can roast small batches as you need them.
• It's fun: watching (and hearing) beans transform is a great way to learn how coffee flavor develops.

What you'll need

• Green coffee beans. Start with a forgiving, balanced coffee. Our green coffee beans list the process, moisture content and tasting notes for each lot.
• A heat source and roaster. See the options below.
• Two metal colanders for cooling the beans quickly.
• Good ventilation. Roasting creates smoke, especially at darker roast levels. An open window, a range hood or roasting outside all help.
• A timer and a notebook to track what you did, so you can repeat the roasts you love.

Home roasting methods

Stovetop pan

A heavy skillet or a stovetop popcorn popper with a crank works well. Keep the beans moving constantly for an even roast. It's inexpensive and hands-on, and a great way to learn to recognize each stage of the roast.

Hot-air popcorn popper

A popular starter method. The hot air keeps the beans moving and roasts small batches quickly. Only use models with vents on the side of the chamber, not a mesh screen on the bottom, and never leave it unattended.

Oven

Spread beans in a single layer on a perforated pan. It's easy but tends to roast less evenly than methods that keep the beans moving.

Dedicated home coffee roaster

If you catch the roasting bug, a home roaster gives you more control, more consistency and bigger batches, and many handle smoke and chaff for you.

The stages of a coffee roast

1. Drying: the beans turn from green to pale yellow and smell grassy as moisture evaporates.
2. Browning: the beans turn tan to light brown and start to smell like toasted bread. Sugars begin to caramelize.
3. First crack: you'll hear a popping sound, a lot like popcorn. This is when the beans become drinkable coffee. Stopping shortly after first crack gives you a light roast.
4. Development: the time after first crack where sweetness and body build. Stopping here gives you a medium roast.
5. Second crack: a quieter, faster crackle. Oils start appearing on the surface. Stopping at or just into second crack gives you a dark roast. Going much further quickly leads to burnt, bitter flavors.

Choosing your roast level

• Light: bright, fruity and floral. Great for highlighting origin flavors, like a washed Ethiopian.
• Medium: balanced sweetness and acidity, with caramel and chocolate notes. A great starting point for most coffees.
• Dark: bold, heavy-bodied and smoky, with less acidity.

Want to learn more about how roast level changes flavor? Read How Roast Profile Affects Coffee Flavor.

Cool quickly

Beans keep roasting from their own heat, so cool them fast. Pour them into a metal colander and toss them back and forth between two colanders (outside is best) until they're cool to the touch. This also blows away the papery chaff that comes off during roasting.

Rest before brewing

Freshly roasted coffee releases carbon dioxide for several days. Let your beans rest at least 12 to 24 hours before brewing. Many coffees taste best a few days to a week after roasting. Store rested beans in an airtight container away from light, heat and moisture.

Safety tips

• Never leave a roast unattended.
• Roast in a well-ventilated space.
• Keep chaff away from open flames and clean it out after each roast.
• Use oven mitts: beans, pans and poppers get very hot.

Start roasting

Your first few roasts won't be perfect, and that's part of the fun. Take notes on time, color and when first crack started, then adjust. Pick up a bag of Guatemala, Brazil or Ethiopia green coffee and start experimenting.

Rather leave the roasting to us? Every bag of our roasted coffee has its roast date printed on it and ships within 5 days of roasting.