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How To Roast Coffee Beans In The Oven

How To Roast Coffee Beans At Home

How to Roast Green Coffee Beans | DIY in Your Oven at Home

Its easier to roast coffee than you might think. Heres my best advice on how to get good results by roasting at home in your oven or popcorn machine.

Asser Christensen

Some people say that the smell of freshly baked bread is the smell of happiness. While I wouldnt disagree, Id say that one smell is superior.

And that is the smell of freshly roasted coffee.

Unfortunately, most people dont realize that roasting coffee at home isnt much more difficult than baking bread. In some ways, its even easier!

I have been roasting coffee for more than 10 years heres my guide on how to do it at home.

How To Roast Coffee Beans In An Oven

How it Works

Preheat the oven to 500 degrees and spread your green beans out evenly on a baking sheet.

Place in the oven for 10 minutes, then take out and stir. Put back in the oven and roast until the desired roast is obtained, taking out to stir about every 2 minutes.


  • Requires the least specialized equipment
  • More downtime than other methods


  • Most fickle way to roast beans, some roast faster than others
  • Smoke trapped inside the oven

Roasting Is Both Art And Craft

Since green coffee is much like an uncooked steak or potato, it needs to be cooked so we can enjoy it.

This is where roasting comes into the picture.

Roasting is about applying the correct amount of temperature in the proper amount of time to bring out the most outstanding flavors of the coffee bean.

  • Too much heat and youll end up having coffee with a bitter charcoal flavor.
  • Too little heat and youll have coffee that tastes very acidic and grassy.

Both these results are pretty awful, so the roasters job is to find somewhere in the middle. However, its not an easy job to decide exactly where a coffee find its peak tastewise, so the roaster is in a sense also an interpreter of coffee.

Not all green beans react the same way when they are exposed to heat, so its common for roasters to do smaller sample roasts, so they are able to pinpoint the perfect window for any given bean.

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How To Roast Coffee Beans In A Cast Iron Skillet

One of the biggest benefits using Cast Iron is how it evenly distributes heat without hotspots. This can quickly lead to scorched beans and over-roasting.

Clean your cast iron before use as previous foods will show in the flavors during the roasting process.

  • Pre-heat your cast iron skillet ideal temperature is around 500°F
  • Place 1/2 cup of green beans in the cast iron skillet this varies as skillets range from 10.25 12.5 inches.
  • Agitate the green beans slowly with a wooden spoon this will allow for a consistent roast.
  • Wait for 5 minutes until you hear the First Crack slowly changing from yellow to light brown, at this point you have light roast coffee. This varies on your preferable roast
  • Remove coffee beans from the roasting process agitate back and forth until they reach room temperature.
  • Store in an airtight container allow sufficient time for CO2 gas to vent off.
  • Tips: Make sure to roast the coffee beans near sufficent ventilation, this includes a large window or exhaust fan.

    How To Roast Coffee Beans In Oven

    3 Ways to Roast Coffee Beans

    Due to Covid-19, we learned many things doing at home. But do you know how to roast coffee beans in the oven? For coffee lovers, it is good to know about roasting coffee at home. Trust me roasting coffee in an oven is one of the cheapest methods you can try.

    If you roast coffee at home and enjoy its fragrance, that will be nice. Follow some methods and maintain the timing, and you will get your roasted coffee. It is not going to be completely well roasted, but this will do. You will never have to depend on a professional one, at least.

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    How Long Does Coffee Need To Rest After Roasting

    Its recommended to wait a minimum of 12 24 hours before brewing, after a day the coffee beans start developing flavors and full body aromas.

    You can make a cup of coffee before a full day, the overall flavor will be less than ideal though.

    Ever wonder How Long Does Coffee Last? On average after 7 days most of flavors have disappeared, certain methods can prolong coffees expiration date for months.

    Sowhat Is The Best Way To Roast Coffee

    The winning method for roasting at home is not surprisingly home coffee roasters. This type of coffee roasting machine is specifically designed to roast coffee in an average kitchen setup.

    Of course, you might want to start out roasting in a popcorn popper just to get a feel for the process. However, you may quickly get frustrated and disappointed by the irregular results, the lack of ability to develop your roast profile, and chaff flying all around your kitchen.

    Upgrading to a home roaster will give you the control you want and the results you need. In the past, these kinds of roasters had ridiculously high price tags. As home roasting has become more common, though, prices have come down and are no longer crazy expensive. You can get a good starter roaster for less than 200 bucks.

    For a true coffee lover, this little investment pays for itself fast. Once you get used to drinking coffee roasted at home just the way you love it, youll find it hard to go back to anything else. And when you add up the savings by roasting your own coffee, you may find that the roaster pays for itself in a short amount of time.

    There are many types of home roasters with wildly diverse ways of roasting. How can you choose the best roaster for your needs? We got you covered in this article with the best home coffee roasters.

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    From Green Coffee To Roast

    Anyone who wants to roast coffee at home should best have basic knowledge of the coffee bean. The green coffee is stable for up to two years, but after a year it loses its freshness. To get one kilogram of roasted coffee, on average, five kilograms of coffee cherries are needed, which is about 4 thousand coffee cherries or about 8 thousand coffee beans.

    It is possible to divide the roasting process of coffee into several phases. During the roasting process, coffee beans lose weight and they become voluminous. The density of the roasted coffee bean is reduced to 1/3 of the original, raw bean. The second phase is the first and the second crack of the beans and the third is the cooling down period where roasting continues from 12 up to 72 hours. During this process, the beans get their final flavor.

    What You Should Know Before Beginning

    Oven Roasting Green Coffee Beans

    To begin with, roasting at home will let you make your coffee just the way you like. It can be a fun hobby, and trying different roasts can expand your coffee horizons.

    Before you just buy some beans online though, you should research the different types of beans to get a scope of just how many different flavors there are in the coffee bean world.

    If possible, pick a few small batches of beans so that you can try out multiple types. Once you have your beans, make sure you have a good place to store them. If you buy green beans, you will have around a year to cook them. Just make sure to store them in a sealed container, preferably in a temperature and moisture controlled area of your home.

    Finally, roasting coffee beans does create a ton of odor. If you are going to roast them in your kitchen, then be aware of this and open some windows if possible.

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    How To Roast Your Own Coffee At Home: 3 Different Methods

    If youre a diehard coffee lover, you already know that freshly roasted beans are by far the most flavorful. And what could be more fresh than roasting coffee yourself? This process can sound daunting, but its actually easier than you might think.

    There are three simple ways for you to roast your own coffee beans at home: in a pan on the stove, in the oven, and in a popcorn popper. We are going to introduce these methods to you, along with all the steps to roast beans using those methods.

    Note: You can perform these methods with inexpensive gear found in your home. However, you can also buy a dedicated coffee roaster machine.

    Watch For Color Changes And Listen For Cracks

    Let the beans change color from green to yellow to light brown and have their first crack. If you want a light roast, stop roasting. If you want medium roast, remove the beans from the heat after they change color to a golden brown, but before the second crack. If you want a dark roast, let them crack the second time, then remove them from the heat.

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    Domestic Oven Or Stove Top Popcorn Popper

    One of the simplest ways to start is to place a layer of beans on a baking tray and roast them in the oven. This will take around 15-20 minutes. Stove top popcorn poppers can also be a good option for home roasting because they roast a larger batch and provide more control of temperature. They allow for you to adjust the gas flame and agitate the coffee beans by cranking the handle. This results in a more even roast colour.

    Best Alternative Coffee Roaster: Nuvo Eco Ceramic Handy Coffee Bean Roaster

    How to Roast Coffee Beans with a Gas Grill/Oven at Home ...

    Its true, the Nuvo Eco looks a little bit like a weird clay pipe, but its a lot of fun to roast coffee with. A small, ceramic roaster that fits overtop either a gas or electric burner, the Nuvo Eco has a small capacity, typically roasting less than 1 cup of beans at a time. In terms of affordability, you really cant beat it. Some coffee hobbyists even buy one to take camping with them.

    This is a pretty hands-on roaster, since you need to jiggle the roaster continuously to move the beans around and roast them evenly. The benefit of the opening at the top is that you can keep a close eye on the roasting process. The chaff-removal process is manual, too.


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    Coffee In Its Natural Form

    Of course, before I teach you how to roast coffee beans at home, we need to talk about the source: the coffee tree. Without their usual trimming, a coffee tree can grow to be thirty feet tall and has many waxy green leaves.

    You might be surprised by a coffee beans appearance before its processed. Once its three or four years old, a coffee tree produces cherries every year, which turn bright red when they are ripe. Once a year , workers pick the ripened cherries.

    Using Your Oven To Roast Coffee

  • 1Open a window and turn on your stove fan to vent the smoke. Be prepared for smoke to be produced by the roasting process. Turn on your stovetop vent fan, if you have one. Open a nearby window to vent additional smoke. Know where your smoke detector is and be prepared to turn it off. Keep a towel nearby to fan the smoke away from the smoke detector, if needed.XResearch source
  • Do not remove the batteries from your smoke detector.
  • 2Preheat your oven to 250 °C to begin the process. Put a thermometer inside your oven, if you do not already have one. Make sure there is one rack in the middle of the oven and wait until the oven is preheated before placing your green coffee beans inside.XResearch source
  • Keep in mind that the ovens temperature will decrease each time you open the door, therefore the thermometer will be more accurate than your ovens controls.
  • Feel free to remove other racks from inside the oven if you wish. Only one rack is needed for roasting coffee.
  • 3Place the green coffee beans into a perforated metal pan in a single layer. Only add enough green coffee beans to cover the bottom of the perforated pan do not allow the beans to pile up on top of each other. You want the beans to each to receive the same amount of heat during the roasting process.XResearch source
  • Green coffee beans can be purchased at a local coffee roastery or at a coffee store online.
  • You will need to roast your green coffee beans in batches unless you only purchased a small amount.
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    Green Beans Are Vital

    Perhaps the most important ingredient in roasting coffee is coffee! But not any old coffee will do. You need green, virgin coffee beans.

    You cant roast regular coffee you buy in the store because its already roasted. So youll need to look a little harder to find them. They can be bought online or through specialist suppliers.

    Youre looking for consistency here. You want beans that are uniform in size and color. This will produce good quality, consistent roasts so that each coffee bean will produce the same flavor. While you can totally play around with blends of coffee when roasting a specific batch you need to keep everything uniform.

    You also need to make sure that youre buying beans that have already been peeled. When coffee is harvested, theyre actually little red berries. This outer shell is peeled to reveal the green bean within. You dont want the red berries, you just want the beans.

    Is Roasting Your Own Coffee Worth It

    Roasting Coffee at Home with Toaster Oven

    Yes, for avid coffee lovers. Creating freshly roasted coffee can be worth the effort and time that love their dark, light, or medium roasts in the morning. Coffee is most flavorful during the first week after the process. So, home coffee roasting means you can always get the best cup of coffee. Take the time to perfect the art of roast and how to use a coffee maker. Beginners will have to go through hours of roasting multiple batches until they get the exact level of roasted coffee that they prefer. This is also the reason most people leave the roasting process to professionals. The time spent may be a chore and can be tedious. However, when you get the roast which fits your needs, it can be an ecstatic moment.

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    Why Home Roast Your Own Coffee Beans

    Its extremely convenient to purchase beans that have already been roasted. Knowing this, why would anyone want to roast their own at home? It seems counter-intuitive, takes extra time, and you need some knowledge to do it.

    However, the truth is that roasting at home delivers several benefits that store-bought roasted coffee beans simply dont:

    • Roasting at home allows you to use freshly roasted beans in your daily cuppa joe. The ones you buy at the store have likely been there for weeks or months.
    • Coffee only stays at its flavorful peak for about a week, meaning store-bought has much less flavor.
    • Roasting your own gives you full control over the flavor and boldness of the beans.
    • You have more choice of flavors when you choose the raw, unroasted beans yourself.
    • Roasting at home is usually much cheaper than buying pre-roasted beans.
    • Drinking a cup of joe, you roasted yourself can be incredibly satisfying.

    What To Look For In A Roasted Coffee Bean

    First, youll need to know that youre beginning with a green bean. When you begin the roasting of the bean, there will be a grassy smell, and the coffee bean will first start to turn yellow.

    As you continue to roast, the darker the bean becomes, the more full the taste of the bean becomes. Therefore, if you want to have a very full-bodied tasting coffee, youll want a fairly dark coffee bean after roasting.

    Once the bean starts to roast, it will begin to smell like coffee, but beware, they also smoke. Youll definitely want to think about airflow and smoke detectors prior to beginning your coffee bean roasting process.

    You also want to ensure that you dont use any type of cooking oil when you are roasting your coffee beans. First, the cooking oil will scorch at the temperatures needed to roast your coffee beans. Secondly, the beans will produce their own oils as they roast, so sticking isnt going to be a problem.

    A good thing to remember is that once you roast your coffee beans, you want to ensure that youll be ready to grind and brew them relatively soon.

    This is because once you roast the coffee beans, they will begin to oxidize much more quickly. Just do the amount of coffee beans that youll need for a five to seven day period so that you dont end up wasting coffee to oxidation and grounds going stale prior to brewing. Lastly, the key to roasting is to listen for your coffee beans to begin cracking.

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    Electric Vs Gas Coffee Roasters

    Since were roasting coffee beans, we need a heat source. Some of the most popular coffee roasters require a gas burner and this is often not included with the product itself. If you opt for a small, stove top coffee roaster, you will almost always need to use a gas stove because electric burners do not allow enough control of the heat.

    An electric coffee roaster, on the other hand, pretty much just requires an outlet. Some of the more customizable roasters with several programmable settings are electric.

    So whats the difference? Is one better? We would say that if you like the convenience of a push-button-and-roast machine, an electric model is the way to go. If you want more control over the process, a gas-burner model gives you more options and a more tactile, hands-on experience.


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