Questions tagged [roasting]

Questions having to do with the roasting of coffee beans starting from green coffee beans to roasted beans ready to grind. This tag may also have to do with the heat profiles of roasting beans or the chemical changes taking place during this process.

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39
votes
4answers
38k views

Why is it not recommended to drink coffee immediately after it's roasted?

The rule of thumb is that you first drink coffee approximately 3 days after it is roasted, but what is the exact reason for this?
19
votes
6answers
439 views

How do I get started in roasting my own beans at home?

I'd like to experiment with roasting my own beans at home. I'd like to keep the equipment requirements as basic as possible. No fancy gizmos or machines. I have a gas stove.
17
votes
2answers
28k views

Coffee Bean Vs Espresso Bean

What is the difference between beans intended for coffee use vs beans intended for espresso? My understanding is the beans come from the same plants as mentioned previously but they are prepared ...
17
votes
3answers
1k views

What type of roast has the lowest caffeine content?

I'm aiming to reduce my caffeine intake, but don't want to drop coffee altogether. What roasts / beans release the least amount of caffeine into my body when drank?
16
votes
7answers
5k views

Home Roasting with Fresh Roast SR500

I've just purchased a Fresh Roast SR500 home roaster. I have no experience roasting coffee so I'm looking for some basic principles to guide my efforts. After two batches so far, the first, done ...
16
votes
3answers
12k views

How long can I store roasted coffee beans?

How long do they retain their qualities? In the coffee store near my home the seller told me that their coffee beans are stored for 1-3 months in their shop. But after purchase I'm also storing them ...
14
votes
1answer
18k views

What is Breakfast/Morning blend?

What features does a breakfast or a morning blend have that other roasts or varieties don't have? Is it always the similar or does it vary by distributor? Is there any difference between breakfast ...
13
votes
2answers
635 views

Why do most coffee shops use such dark roast?

I've noticed that most (non-specialty) places that sell coffee tend to have very dark roasts. This includes Starbucks, any Fast Food restaurant, most nicer restaurants, and hotel coffee. I can't ...
12
votes
2answers
399 views

Is it necessary to sort beans after roasting?

After roasting, the beans colour is usually uneven. Most of the beans have the desired roast, but some are burnt, and some have visibly lighter colours. Some people sort every single bean after every ...
12
votes
2answers
2k views

Reduce power of popcorn popper for roasting coffee

I've been roasting coffee for a couple of years now, and I've always used a popcorn popper. I'm interested in taking things a bit more seriously and would like to be a bit more meticulous when it ...
12
votes
2answers
1k views

Home roasting and ventilation

I have been home roasting with a Gene Cafe since early this last summer. I chose the Gene Cafe specifically because it appeared to be designed for attachment to a permanent vent solution. However, I'...
10
votes
5answers
609 views

What is white coffee?

What is white coffee? Does "white coffee" refer to the roast level of the beans, or additives to the beverage, or is it some other type of coffee bean, or a different beverage completely?
9
votes
1answer
323 views

Home roaster cleaning and/or seasoning

I have a Gene Cafe that I have been using at home for some time. On inital reading of the directions, it recommends washing the roasting chamber: Oils and residual debris remaining from the ...
8
votes
2answers
9k views

Why do some grounds float and others sink when brewing by pour over

When brewing by the pour over method (in my case with a Chemex) I've noticed that some ground beans will float when I fill the filter with hot water, and other beans will not float. It's consistent ...
8
votes
5answers
4k views

What are the flavor characteristics of under-roasted coffee?

As a frequent coffee drinker, I can tell when the coffee beans have been over-roasted; the coffee is bitter. What can I tell when the beans have been under-roasted? What does under-roasted coffee ...
8
votes
2answers
190 views

What was the cause for the current overwhelming popularity in the brighter, more acidic coffees?

Almost every coffee shop I go to serves up quite acidic and bright coffees. It seems that this is where modern coffee is and is not necessarily a bizarre phenomenon in itself but in particular the ...
8
votes
2answers
1k views

Whats the purpose of preheating a coffee roaster?

I own a Gene Cafe and was wondering why many across the internet recommend that the roaster is preheated before the roasting takes place, in comparison to the manufacture which claims that one should ...
7
votes
2answers
214 views

How to methodically pick out coffee nuances

I have been roasting coffee for years now at home. I definitely can pick out overall coffee differences (body, acidity, astringency, fruited, etc.) but when I read ratings and notes from my provider (...
7
votes
1answer
236 views

Roast Profile vs Rest Time, any connection?

TL;DR: Is there any science or data to support coffee that has undergone longer roast cycles needing less rest/degas time? For some time, I have been doing my own roasting by cranking the machine to ...
6
votes
2answers
1k views

How to judge time between cracks when roasting

I just roasted beans at home for the first time and have a question about the expected timing between cracks. I roasted 1 cup of beans in a Crate and Barrel stovetop popcorn popper on the side burner ...
6
votes
1answer
157 views

Is it possible to roast coffee in an industrial glass kiln?

Could you roast coffee in an industrial glass kiln and it be drinkable? A strange question and purely hypothetical. This came about with a discussion with one of my friends who is a glass maker at ...
6
votes
1answer
179 views

Roasting my coffee beans

I just read online that some people roast their coffee bean before they grind the bean, to adjust the flavor. This sounds really interesting, and I would like to try. I would like to do this properly, ...
6
votes
1answer
685 views

Why does coffee lose caffeine as it is roasted?

I have heard that coffee actually loses caffeine as you roast it, which means darker blends have less caffeine. Why is this?
6
votes
2answers
251 views

Nutrition information of roasting coffee in butter oil

I understand that some Asian coffees, like those from Vietnam and Cambodia, are roasted in butter oil. Does anybody know how much of the saturated fat and cholesterol in the butter is absorbed by the ...
5
votes
3answers
233 views

Is dark roast stronger than light roast?

Dark roast coffee is roasted longer and at higher temperatures than light roast. What is the difference in taste?
5
votes
3answers
9k views

How much weight reduction occurs after roasting coffee beans?

Does the roasting process lead to weight reduction? If so, what are determining factors? type of coffee? type of roast(dark, medium etc) ? If you have X lbs of unroasted coffee beans, how much (...
5
votes
3answers
149 views

Quality of ground coffee

Recently I've had some amazingly bad coffee in local cafes, and this week I had the same experience with some ground coffee I bought. I used a french press for that. Watery, dark colour, bitter and ...
5
votes
1answer
663 views

How to tell if coffee beans are burnt?

I bought a bag of whole bean "Medium Dark" coffee from a café which recently started roasting its own beans. To my taste it is awful, however am unsure if the coffee is burnt or just not to my taste. ...
5
votes
1answer
906 views

Roasting suggestion for Behmor 1600+ for Rwandan beans

My Behmor manual suggests profiles 1 and 2 for hard beans, 3 and 4 for soft low grown beans, and 5 for Island beans, city/city+. I've been roasting Rwandan beans on 3 and it's the best, but a little ...
5
votes
0answers
73 views

Slow Roasting Coffee Beans

Conventional Coffee bean roasts at around 200-240C at around 11-19mins to ensure Maillard reaction in the beans to create the familiar taste of coffee we all know today. Could we instead roast the ...
4
votes
1answer
208 views

“Speed Roasting” from Coffee Tonya: Is it just as good?

If any of you are familiar with the local coffee chain in Yokohama Japan, called Coffee Tonya, they have this speed roaster that roasts the beans you choose from their great selection of beans from ...
4
votes
3answers
4k views

How long does it take coffee beans to degas?

A google search brings up a great article by Hannah from Fellow Products called "Understanding Degassing: Is Fresh Best?," in which she claims: Degassing varies depending on the type of ...
4
votes
1answer
659 views

What coffee bean and roast are appropriate with soy milk?

Soy milk tastes quite different from cow milk. Yet coffee chains seem to make their milk-based drinks from the same coffee pot. The pot is most often made of dark-roast blends "from the house", and it ...
4
votes
1answer
677 views

How does humidity affect roasting?

How does the humidity affect the length of time required to reach a good light roast in a gas fired roaster.
4
votes
1answer
128 views

Is it possible to further roast instant coffee granules?

Can I take standard roasted instant coffee granules and further roast them in the oven? Is this doable, or even advisable?
4
votes
1answer
295 views

Taste of coffee that has not rested long enough

There is a lot of speculation about how long to allow coffee to rest after roasting prior to cupping, see this post and this post, and it has been discussed at length at home barista and other places ...
3
votes
3answers
105 views

Where to buy small batches of unroasted beans [closed]

I want to dabble in home roasting. Where can one typically source unroasted beans from? Do roasters typically sell unroasted beans to the public? I have never seen unroasted beans for sale in a store....
3
votes
2answers
210 views

What's the recommended way to roast coffee beans at home? [duplicate]

There are couple of different methods to roast beans at home. Namely; Using a specific home roaster Using a pan Using a hair dryer Using a (sometimes modified) corn popper are alternatives I have ...
3
votes
2answers
102 views

Is it possible to grind then roast?

Is it possible to grind green coffee beans, then roast the grinds, and make a good cup of coffee with the result? Are there reasons why doing so would be impossible or impractical or would necessarily ...
3
votes
2answers
1k views

Can I reduce harmful terpenes?

There are reports that terpenes in coffee made without a paper filter raise cholesterol and risk of atherosclerosis / heart disease. (See Coffee and Cholesterol and Warning: Going to the Coffee Shop ...
3
votes
2answers
749 views

What is the Roasterie's city of fountains blend?

I eat roasted coffee beans on occasion, and usually all taste about the same. But I have noticed that beans from the Roasterie's City of Fountains blend have a rather burnt flavor. I turns out the ...
3
votes
2answers
149 views

Is it possible to make instant coffee of varying roasts?

I've never seen instant coffees being sold consisting of varying roasts (i.e. light/mild, medium, dark etc.) does such a thing exist? Or is there a reason why they haven't been tried?
3
votes
1answer
68 views

What is the process for roasting and preparing chicory for coffee?

It seems to me that Community Coffee is essentially the standard for chicory coffee, both blended and just straight brewed chicory. What are the recipes, steps and ratios for roasting, preparing and ...
3
votes
1answer
84 views

Caffeine content of different brewing methods

For a given type of bean, do different brewing processes and temperatures (drip, French press, Mocha, espresso, cold brew, etc.) produce coffee with different caffeine content? It would seem ...
2
votes
1answer
118 views

What are the basics of creating an espresso blend?

Having roasted almost exclusively single origins, tackling blends seems somewhat daunting. What are the basic elements of an espresso blend that make it particularly good for the espresso ...
2
votes
3answers
233 views

How should I distribute coffee from a small roaster?

I am about to start a coffee roasting business somewhere in the States. For now the game plan is to sell online. What are the most feasible strategies to ship small batches (14 oz)? Is that a good ...
2
votes
2answers
615 views

Where to measure ET on drum roaster

I am considering upgrading my home roasting setup to a gas Kaldi Wide. Part of what is so appealing is that this roaster is so bare bones and will be easy to modify to try different things. I am ...
2
votes
1answer
1k views

What are the common Ethiopia Sidamo roast suggestions?

I usually roast Brazil and Colombia beans, and I must say I have already found the profile I've been wanting in those beans, like the chocolaty nutty, the right balance of acidity and all. It happens ...
2
votes
0answers
38 views

Petroncini roaster issue

I have a petroncini raoster, semi-automatic It's really good, but I whenever I fase an issue, I find really hard to understand -and fix- it. I have been searching for a while now, for an operation ...
1
vote
2answers
414 views

Understanding Coffee Bean names as they relate to roast

So for example, in my local Fairway Market, I see barrels of coffee beans labeled such as "Ethiopian Harrar", "Costa Rica Tarrazu", "Ethiopia Yirgacheffe" etc. These names literally refer to ...