Coffee Stack Exchange
Coffee Stack Exchange

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1475 questions
69
votes
8 answers

How can I figure out how much caffeine is in my cup?

I haven't been able to find a good way to approximate the amount of caffeine in the coffee I make. Googling yields information like this Mayo Clinic article that mixes serving sizes and brewing methods, and it reports one 8 oz coffee contains…
Nathan
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49
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7 answers

How should I store whole bean coffee?

I just got a pound of microroasted, local coffee and am curious what the optimal way to store it is (what temperature, humidity, etc)
Kyle Macey
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41
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1 answer

How will "cold brewed" coffee differ from traditional hot-water extraction methods?

Generally speaking, what do "cold brewed" methods hope to achieve compared to the more traditional hot-water methods of extraction? Does the amount of caffeine vary between hot brewed and cold brewed coffee? What about the other compounds such as…
Alex
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41
votes
4 answers

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?
JavaCake
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38
votes
10 answers

Why isn't coffee commonly sold in sachets, like tea bags?

I was wondering why single serving coffee sachets never really took off the way tea bags have. The only explanation I could find was that steeping coffee too long makes the coffee taste bad, but it seems like that could be avoided by removing the…
apaul
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35
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7 answers

What's the most effective way of generating crema from an Aeropress?

I know a number of people have become fairly capable at getting a nice amount of crema at the end of the process of making a cup with their Aeropress. I, however, am getting just a very thin, partial layer at best. I've experimented with pressure,…
Max Fierke
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35
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1 answer

What is the hexagon funnel shaped thing that came with my aeropress for?

When I bought my aeropress, it came with this weird hexagon thingy: What is it for?
Jev Björsell
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32
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3 answers

When does coffee go off?

If I've ground a batch of coffee, I know I should use it as soon as possible, but if I store it (in an opaque, air-tight, slightly-below-room-temp container), how long have I got to use it? Are there any key points at which the quality will degrade…
fredley
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30
votes
2 answers

Does the hardness of water matter when making coffee?

I live in a hard water area and when brewing English Tea I can definitely taste and see the difference when compared to where I'm from, which is a soft water area. Does the hardness of the water matter when making coffee, too? For instance, whether…
EdChum
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29
votes
12 answers

How can I minimize the amount of grounds at the bottom of my French press coffee?

Whenever I brew coffee with a French press, I tend to get a significant amount of grind left near the bottom of the cup, making the last bit of coffee far less enjoyable - mostly regardless, it seems, of how finely I grind the beans. Is there any…
user85
28
votes
4 answers

What is the process to reduce bitterness in coffee?

I've heard of adding salt to coffee to reduce its bitterness. I've also heard that using freshly roasted and ground coffee would reduce the bitterness experienced when drinking coffee. Though it seems making freshly roasted coffee could actually…
anon
27
votes
4 answers

Are robusta and arabica the only bean varieties?

On this site, and virtually everywhere, I hear people speaking about coffee in terms of "arabica" or "robusta". I know these are two coffee varieties, but are there others as well? Why aren't those as popular? Where can they be found?
Ludwik
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26
votes
7 answers

What is the science (if any) behind bulletproof coffee?

Over the past few years I've been slowly starting to dabble in the caffeinated arts. I'm far from being knowledgeable, but I'm definitely very curious about this favourite beverage of mine. So, I occasionally read up on it. Not long ago I…
MetaFight
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26
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3 answers

Chemically, what's happening to coffee after it's brewed?

So I've prepared my coffee in the morning, and transferred it to a thermos flask, where it will only cool down negligibly over the course of the day. Is anything happening to the coffee in the flask? Will the taste of the coffee change over the…
fredley
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26
votes
7 answers

I run my espresso machine until my whole cup is full. What's my coffee called?

I have a cheap espresso machine. I grind dark roast beans separately, fill a "double" filter with it, run the espresso machine and won't turn it off until my ~250ml cup is completely filled. I drink it right away, brewed coffee style, without adding…
Rollor
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