Roasting Coffee at Home using a Popcorn Popper Air

Roasting Coffee at Home using a Popcorn Popper Air

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Your Guide to Roasting Coffee at Home with an Air Popcorn Popper, Few things are better than drinking a delicious coffee that you roast yourself. Becoming a home roaster allows you to explore different types of coffee, learn more about your favorite beverage, and also prepare your daily cup according to your preferences. You will enjoy the aroma of freshly roasted coffee and see the beans in your cooling tray, knowing that you have participated in their development.

Are you looking for the best home coffee roaster machine? ok, actually they are many coffee roaster machines. but If you want to Roast coffee with a popcorn maker. bring a cup of coffee and continue reading. you are in the right place

Roasting coffee beans in the popcorn popper is a quick and easy way to roast coffee. There is no need for industrial machinery, but simply a popcorn machine. This machine expels hot air over the beans and results in a very homogeneous roasting.

Using a popcorn machine to roast the beans gives you complete control over the roasting. You can roast the beans as dark or as light as you like! And the equipment you need is relatively inexpensive and very easy to get.

Roasting coffee beans in a popcorn popper steps

Roasting coffee

#1 preparation

We put the fresh coffee beans in the Popcorn Machine and when it starts to heat you will see that the cuticle that wraps around the coffee bean, gently peels off and the color changes from light green to yellow, assuming different colors to dark brown.


#2 The Coffee begins to steam and crackle

As with popcorn, when coffee is roasted it inflates and doubles its volume. When the coffee begins to steam and crackle like popcorn, it is a sign that the roasting begins after about three minutes. At this point, we can decide the level of roasting, and then continue to work the coffee until we achieve a burnish that we consider more appropriate, according to the taste. Never fill the popcorn machine more than halfway through its level.

#3 Temperature

When it is roasted, we put the coffee beans in a container and let it cool down to room temperature, they are placed on a tray and after checking that there are no pebbles and that all the beans are perfect, we cover it with a sheet of transparent film and let it rest in the freezer for about 15 minutes

#4 Bags

You can put the coffee beans in hermetically sealed bags, preferably vacuum-sealed, or in an airtight jar and leave it in the refrigerator for at least 5-6 days before grinding and consumption.

Once ground, you can brew the best cup of coffee and taste the intense and enveloping flavor. for a good cup of coffee, we need before that a good preparation 

The main transform on the coffee beans during Roasting 

Green coffee beans are seeds with dense and compact structures. But when you put them in the roaster, their original shape changes completely. Let’s see what physical changes occur.


The Color of coffee beans

Perhaps the most obvious change that occurs during roasting is that of color. Before roasting, the coffee beans are bluish-green. They then turn brown. There are molecules called polymers. these molecules are formed when sugars and amino acids are mixed with the application of heat. Besides, during roasting, the husk or silver film will be removed, that is, the external layer of the coffee bean that looks like paper.

Roasters and consumers use the degree of coloration as a parameter of quality

Humidity and Mass

Green beans that have been dried and processed are composed of approximately 10 to 12% water, but roasting decreases this amount to about 2.5%. In addition to the water already present in the green beans, chemical reactions generate additional water. However, this water evaporates during roasting.  

The decrease in humidity and the transformation of some parts of dry matter into gases are the reason why the beans have a lower overall mass after roasting. On average, grains lose between 12 and 20% of their weight. Roasters often monitor the percentage weight loss so that they can identify which lots should be examined more carefully for quality assurance.

Different roasting profiles will have an impact when dehydration occurs. Changes in water activity at different points in the roast can mean a difference in chemical reactions and this could affect the final profile.


Types of coffee roast, Light Roast vs. Medium Roast vs. Dark Roast Coffee

When Coffee Goes Bad

The type of roasting will vary according to the time the grain is in the toaster.


As time passes, the grain darkens, and to simplify, we will have 3 main types of toasting: low, medium, and Dark roast coffee

Low or light roasting

Cinnamon colored, very acidic, and with a lot of caffeine.

Medium Roast or American roast

Generally, for the filter, it is the most traditional for its taste and aroma. It has medium acidity and caffeine.

Dark roast coffee

French Roasting:

 The French roast is a high, dark brown, fat textured roast for full-bodied coffees.


Italian Roasting:

The Italian Roast, is one of the very high coffee roasts, with maple aroma for many the preferred ones to make espresso.


It is preferable to roast in a space that is not closed and that is protected from the wind. There may be a lot of smoke.

If you don’t want to use epoxy, measure the width of the popcorn machine’s chamber. Look in the foreign food section of the supermarket. Many cans come in different sizes. Popcorn machines have a slight tilt in the bottom. The can should stick out about eight inches. So a can that is 10 or 12 inches long and the width of the popcorn machine will slide into the narrow area and hold in place.

Keep an eye on the process at all times. Be extremely careful when handling hot items.

Do not roast more than you can use in a few days. Coffee tastes best from 3 to 8 days after roasting.


Why roast coffee?

The roasting process allows you to obtain a ready-to-eat coffee with the highest quality aromas and flavors … Moreover, roasting your coffee gives it the taste you want.

How do I choose my coffee beans?

Just looking at the color of the bean will tell a lot about its taste, the darker the bean, the more roasted it is, and the more bitterness and toasty taste will come out. If the coffee beans are close to black, pass your way!

What is the best espresso coffee?

Ideally, for your espresso coffee machine, you would prefer a coffee bean of very good quality, such as Le Classique Café Privilège, which gives you a freshly ground coffee with a grind that matches the espresso.

Which grind for a strong coffee?

The medium-fine grind, comparable to powdered sugar, is ideal for filter coffee makers and V60s, or Italian coffee makers (the Moka) for those who like strong coffees. It is also suitable for use with Aeropress.

Which coffee grind for a percolator?

To use your percolator or your Italian coffee maker (mocha) properly you will need fine ground coffee. The reason is simple, the contact time between the water and the coffee is short, therefore the grind must slow down the water and its flow so that it has time to soak up the aromas.

Which organic coffee beans to choose?

Well-balanced, this Arabica coffee offers a soft acidity. It is cultivated at high altitude which allows us to preserve a maximum of aromas… Méo’s organic pure Arabica coffee, fruity and tangy, comes from the best plantations in Latin America and Africa certified AB (Organic Agriculture).

Watch the video This is how we roast our own coffee (using popcorn popper)

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