Roast Your Own Coffee
If you have a hot air popcorn popper, you can roast your own coffee right at home!
I have an old Presto Poplite popper. I bought my green coffee beans from Sweet Maria’s online, and followed their instructions for roasting the coffee. There is a plethora of information online on how to roast your own coffee at home, and I gleaned from several sources. Pay attention to what poppers everyone recommends. I have one that is not recommended, but after seeing that other people use it, I made the decision to try it and it’s working for me.

Here are the green coffee beans in the popper.
I compensate for the fact that I don’t have the “right” popper, by holding the lid on, tilting the popper back (so the beans don’t fly out – they do bounce about) and swirling the popper to keep the beans circulating. I’ve had no problems. Coffee roasting is done outside because it does start to smoke near the end, as you’ll see.
Here the beans are beginning to change color. At this point chaff starts to fly out of the popper. Continued swirling of the beans loosens this and helps it to get out of the beans.
I collected some of the chaff for a picture – usually I just let it fly into the grass.
The beans are getting darker and have just finished their “first crack”. This sounds like popcorn popping. They aren’t done yet!
Here are the coffee beans right where we like them – just about 15 seconds into the “second crack” – it really sounds like rice crispies snapping and popping quickly. I haven’t really timed it yet – but I think this is around 4 minutes since I turned on the popper. It does not take long! I did over-roast my first batch – it was more like espresso. Now I listen for the cracks and watch the color of the beans. It just takes a little practice.
The key is to stop roasting just before the beans get to where you like them, because they continue to roast for a bit even out of the popper. Here I pour the beans into a colander, then swirl it around to cool it quickly. When the sizzling slows, I take the beans inside and spread them on my stone counter – that cools them quickly. 
The beans nearly double in size, and get lighter in weight. After the sizzling stops and they cool, the smell is incredible!
Here is the important part. You can’t just roast the beans, grind them, and enjoy your coffee. You have to let them “de-gas” by letting them sit for 18-24 hours or so (it can vary, apparently) to release carbon dioxide. But you also want to keep them out of the air. I reuse a coffee bag that had flavored coffee in it – see the little valve? That allows the carbon dioxide to escape, but also keeps the coffee beans fresh.
There are a lot of blogs, websites, and such out there online that will tell you all about varieties of beans with complicated names (way more than just Arabica and Colombian), types of roasts (City+, Full City, Espresso), and lots of other technical stuff. I bought a sample pack from Sweet Maria’s that contained four 1 lb. packs of green coffee beans – and from those we’ve found 2 varieties that we really like. The taste of your own freshly roasted coffee is just incredible. It has flavor, and hardly any bitterness – some varieties are almost “sweet”, enabling me to drink them black – and I usually put milk in my coffee. It’s worth trying.
Now the only thing left to do (and so far we think it can be done) – is to try to sprout some of the beans and see if we can grow our own coffee – one of my husband’s dreams!
I don’t just roast coffee. I also write about frugal tips, ideas that work for me, as well as lots of silly things and humorous moments that happen around here. You can also “Peruse the Pod” by clicking on any of the topics in the left sidebar…
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Yes, it is supposed to work. Sweet Maria’s has stove pop instructions. It does make a lot of smoke, though, so perhaps you might want to roast on a grill outside.
Great write up on roasting coffee beans. I am wondering if you think an on the stove popcorn popper (w/ a turn handle) might work?
I’m not a coffee drinker, but this post was so interesting! I had no idea you could roast beans in a popcorn popper.
This is great. We’ve considered roasting our beans, but I’ve heard the smell it so strong we didn’t want to do in our house. But outside in a popcorn popper is a wonderful idea. And what a money saver. Coffee beans are one of our splurges, so I’ll have to try this. Thanks.