Roasting Coffee at Home with Toaster Oven
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- Опубліковано 11 вер 2024
- Here is the technique I use to roast green coffee beans at home. Green Coffee beans usually take about 15 minutes to roast in a preheated roasting skillet, but my method takes around 25 to 30 minutes, depending on the water content of the beans. This method is a slower roast method where the toaster oven is not preheated but warming up gradually when the power is turned on. The maximum temperature setting on my toaster oven is 250C
Update - I have long since progressed to using a heat gun and flour sifter to do my coffee roasting. It is way faster. 200grams in less than 12minutes. Resulting roasts are great and fast! i will eventually record a video showing the entire process and update it here.
I no longer use the Toaster Oven to roast my coffee anymore, here is the method I use now => ua-cam.com/video/EXGXj9AlCqY/v-deo.html
That roast looks incredibly uniform, even better than a popcorn-popper method. Thank you for the video, I’ll have to try this!
Hi Walton, I have stopped using this method to roast my beans now as the roasting times are too long, unless you can get a toaster oven that goes beyond 250C degrees, then the beans are going to end up being baked. The preferred method I use now is the heat gun wobble disk method. I have to build the roaster but it gets 200 grams of green beans roasted in 11 minutes versus the 24 minutes in this toaster oven method.
Nice. I am impressed of how evenly the roast is
appreciate your encouraging comments about the wobble disk roaster on Reddit! glad to see you swapped coffee roasting techniques. keep up the good work!!
You are the man Larry! Thank you for inspiring me with your ingenious design!
glad you were inspired! great hobby, imo.
Thanks for sharing! I'm currently putting together this setup aswell. And this video is vert informative.
Excellent.
Great tips with the foil. Many thanks!
A small hole may be cut from the aluminum foil just above the glass window and a strong torch light be used to observe the colour of the roast.
Cool bro...good roast 👍🏻👍🏻
Was thinking of doing this setup but I might end up getting a freshroast sr500 for smaller batches or maybe a behmor. Costs about $100 than this setup but it cools down the beans, collects chaff, and ensures an even roast. If used regularly I think the $100 is worth the extra convenience features.
Yes, the Behmor with its smoke and chaff removal features may be well worth its extra price tag for the extra convenience.
@@weeliano I ended up getting a heat gun. It's only about $30 and it'll hold me over while I decide if I should upgrade. I can roast pound of coffee in about 25 minutes which is good enough for me.
Hi, can we distinguish the main difference between 1st and 2nd crack?
1. Is there a clear time gap between 1st and 2nd crack such as after 1st crack stopped for some time gap, then follow by 2nd crack?
2. Judging from the smoke level, can we distinguish 1st and 2nd crack by means of the amount of smoke generated? Which means, does 2nd crack generates much more smoke than the 1st crack?
It depends on the beans you use. From my experience roasting Colombian green coffee, the first crack is barely audible and it appears around 20 to 25 minutes from a cold oven. I have roasted Vietnam robusta and these beans hardly made any cracking sound and they roast, or rather burn faster. The water content in the beans will also affect how long you will hear the cracking sounds. If you are a first time roaster, don't be afraid to let the beans crack consistently for around 1 minute after it starts, you will get a good Full City roast this way and I prefer roasting my coffee to Full City. If you stop at 1st crack, you will get a fruity tasting coffee. If you see smoke, then it means you are very close to the 2nd Crack and the 2nd Crack is usually louder and more repetitive. The first crack will happen for a short while and then stops completely before the 2nd Crack arrives. Please refer to this chart for the colour of the roast. cdn.shopify.com/s/files/1/0019/4573/1139/files/Coffee_Roasting_Guide_2048x2048.jpg
@@weelianocraft thanks Soh, this is very helpful especially to me as the first tine roasting my coffee beans. I am expecting my drum roasting to be arriving this week. Thanks for sharing the chart, it is very helpful to me.
@@BaysviewPg Do let me know how it turns out. Remember to cut a hole in the aluminum foil so yo can observe the colour of the beans. Use a powerful LED torchlight to shine through the hole to see the colour of the beans. Don't worry if the beans appear darker than they look, what you want to look for or rather hear for is the consistent 2nd cracking sounds. Let the 2nd crack run for 1 minute, then you can shut down the toaster oven and remove the basket immediately from the oven and cool it down quickly as I demonstrated in the video.
Hello Soh, the drum has a glass window for you to take a look at the beans roasting condition.
Yes, with lower flame setting, 1st and 2nd crack can be differentiate very distinctively and obvious. 1st crack sounds like popcorn sound, whereas 2nd crack sounds like rice crispy sound or lower tone if compare to 1st crack. Pretty excited after making the first attempt.
Hi, great review. I want to ask, is there supposed to be a silver skin or dust or anything flying around in the oven, and do you think its gonna suck into the fan exhaust, so is it gonna damage the oven?
So far it hasn't done anything negative to my oven. I found that for my particular oven model, there are 2 heating elements above and below. During the rotisserie turning, only the upper element is turned on the lower element is off. I found that is quite strange and that is why my roast times are usually 30 minutes and below which a lot of coffee roasters tell me are way too long. The chaff usually falls through the drum's wire mesh and land on a debris tray below, the chaff doesn't fly around in the oven as the rotation speeds is quite slow, perhaps 3 to 4 rounds per minute. More chaff will actually fly out when I shake the rotisserie drum in front of my fan aimed at the window. Some chaff do fall on my kitchen floor and I just have to vacuum them up. Been roasting like that since 2018 and the oven is still fine. I will be changing to a new messier way of roasting with a heat gun to speed up the roasting time.
My oven temperature goes maximum upto 200 degrees celsius. Should I even try? Some suggestions please.
I don't recommend it. 200C is a bit too low, you may try experimenting to see if you can get a good roast from it. It might take a bit longer for you to get the core temperature of the beans up to the roast temperature.
I tried but beans not cracked even after 30 mins. What could be wrong?
A couple of factors, the water content in your green beans may be on the high side so it will take a bit longer for the water to expel from the roasting process. Also check that the temperature of your toaster is set to maximum 250C or above 480F. When you start the roaster cold, it will take about 10-15 minutes for it to reach the ideal roasting temperature. If your toaster oven has a clear glass cover a lot of heat will radiate out the clear glass, get some aluminum foil with the reflective side facing inside to cover the glass cover. Cut a small hole to observe the colour of the beans during the roast process, you may need a powerful LED light source; I use a bicycle LED light now and it shines a powerful white light into the observation hole for me to see the colour of the coffee beans as it roast. I also discovered that the type of beans you use may not crack as predictably as others. Vietnam robusta beans will not make any cracking sounds until they are almost completely burnt, Colombian, Indonesian Mandheling, Toraja, Myanmar, Papua New Guinea arabica beans will start to crack usually around the 25-30 minute range. Your case may be that the temperature is not hot enough. Get a oven temperature probe to verify you are at the correct temperature.
I failed too, after watching this video, my best guess is my oven is too big so the heater is too far away from the roast drum, 250C isn't a low number to most home electric oven, I'm planing use the tin foil to try to reach that temperature
Keep trying, the first time I tried this method I got very under roasted beans. Don't be afraid to let it roast until you hear the cracks and let the cracks go on for at least 1 to 2 min and it must be a consistent cracking sound. Again it also depends on the beans you are using.
Is this setup still working? I'm wondering how long a toaster oven will last as compared to something like a Behmor. I've been roasting in my home oven, and it's ok, but this looks better and can be moved outside to avoid the smoke in the house, so I really want to try it. One other question was, were the agitation paddles really needed? Do the beans on the edges roast too fast/dark without them? Thanks for posting this video, it was super informative and has me excited to try it.
It is still going strong, my toaster oven is still working since 2014 when I got it, I am roasting green coffee with this oven since 2018. I forgot to mention that my oven is a convection oven meaning there is a small metal fan that blows the heated air around, the agitators I built into the basket helps to redistribute the beans so there are roasted more evenly so they are definitely necessary.
cool mod!
How many liters is the oven?
I believe it's a 33L capacity.
19 liter oven for braket 140mm diameter and 220mm long or little braket 140mm diameter and 180mm long enoght for 400 gram grean bean
Your neighbor is going to curse and sweat whenever you roast coffee beans. There will receive free coffee aroma as well as the silver skin. Ok let's leave the joke aside, I use this similar drum rotisserie to roast my beans but over the gas burner. I noticed about 10% of the beans were scorched where you can see burning spots on some of the beans. Do you have this problem?
I get very even roasts with this setup, I am proud to say I almost never get scorched beans unless there are a few beans from previous roasts that got stuck between the crevices in the basket. I have been using this setup for the past 4 years and after many roasts, I have perfected my technique. Heh heh luckily I only roast like once every week and a half I have not received any complaints yet from my neighbours.😅
@@weelianocraft sounds good, I think this is the most reliable way to roast coffee beans. Those hot air roasters have limited lifespan, and very limited roasting weight. This toaster oven can also be repurposed for other roasting too.
One more question, since my current roaster doesn’t have rotisserie, I will have to invest on another toaster oven which comes with rotisserie, however I notice that some toaster ovens are 230C and some 250C max. I believe we should go with 250C despite that first crack is usually at 200-210C bean temperature, but the ambient temp will need at least 30-40C higher. What do you think?
Hi, im also thinking of doing this setup. How long until it reach the first crack? Approximately?
From a cold toaster oven, the 1st crack will appear around 25 to 30 minutes. I know it sounds very long but for a lot of other roasters, they put their beans in a pre-heated oven. I just let mine warm up from cold. It also depends on your beans, if it has a lot water content it will take longer to crack. The maximum temperature I can get on the toaster oven is 250C but the beans will only crack when it's internal temperature is 195C, so although the exterior might be 250C, it takes time for the bean to heat up to the cracking temperature. Don't be afraid to experiment on longer roast times. One more thing, every time I roast I roast about 300grams of coffee beans, so if you use less, the time to warm up will be shorter as well. That's why the best is to use your ears to listen, and also if you can shine a very bright white LED torch light into the toaster oven glass window (with a hole cut through the foil) to check the colour of the beans. (Do note that they appear darker than they really are, so don't freak out if they look too brown) One more thing, avoid the opening the toaster oven after you started to roast as it will massively reduce the temperature. If your toaster oven is a convection oven like mine, remember to turn on the air circulator fan to re-distribute the heat evenly. Happy Roasting!