Let’s go through it step-by-step:
1. Preheat the air fryer for 2 to 4 minutes. Set the temperature to 390 degrees Fahrenheit (200C) or high. It depends on the roast level that you want.
2. Place 1 to 4 cups of fresh green beans into the basket. (I recommend Arabica coffee beans)
3. Place the basket into the air fryer.
4. Roast for about 9 to 15 minutes (Depends on the temperature you set earlier). (More about the roasting times below.)
5. When roasting a full basket, then open the lead at 5-6-minute mark, stir the beans so that they roast more evenly. (If you are roasting a small amount, then you don’t need to stir.)
6. When they’re finished roasting, immediately place the beans on a cool surface.
7. Once the roasted beans have cooled, place them in an airtight container until you use them.
Home Roasting Color Guide
1. Very light brown: Not ready yet. Will have a sour taste and weak aroma.
2. Light to medium brown: If you like mild flavor yet full body and full aroma, then this is for you.
3. Medium to dark brown: The most common roast in the United States. It has a strong aroma and full-bodied, intense aroma, quite strong sweetness.
4. Dark brown: This roast is also known as a Viennese or French roast. It has a robust aroma and full-bodied and intense sweetness.
5. Dark chocolate brown: This roast very dark, and it is known as espresso or French. The beans have lightly shiny, oily surface. This roast is probably not for everybody as it has a richer, somewhat charred taste. If you like very deep, strong, and intense flavors, then this is for you.
Listen To The Popping And Crackling Sounds
The color of the beans is just one of the ways to determine the degree of roast. I have read that experienced roasters also monitor the aroma and the size of the bean.
However, there is another, perhaps, an easier way to determine the readiness of the beans.
It is by cracking sound you hear during roasting. That cracking sound similar to a popcorn popping sound.
This sound is also known (among professionals) as ‘the first crack’ and ‘the second crack’.
These series of cracks will last about 1-1.5 minutes and have a 1-2 minute gap between the first and the second crack. It all depends upon the type and also the amount of beans being roasted.
During the process, when the coffee bean starts to expand, and its moisture has begun to evaporate, you should hear this cracking sound, and that will happen twice.
When using an air fryer, you should hear the first popping sounds around 8-9 minutes of roasting. That is the moment when beans have reached the early stage of edibility at the light-medium brown color.
Now, if you keep roasting up to 10 minutes, then medium to dark roast will be reached and ready, which is somewhere in between the first and the second crack, which should happen just around 11-minute mark.
However, if you want to go even darker roast, then keep going 1-2 minutes more. Now you should be reaching into the dark brown territory.
Source (for more info): https://foodhow.com/roasting-coffee-beans-in-air-fryer/
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