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32
votes
18answers
46k views

Caffeine content of cold-brewed coffee: higher or lower than hot-brewed?

I recently rediscovered the joys of cold-brewing coffee. (One level cup of rough-ground beans, 4-1/2 cups of cold water, steeped overnight and strained, produces a rich coffee concentrate. A shot or ...
12
votes
8answers
10k views

How can I maximize the caffeine content of my coffee?

Like many people, I rely on coffee in the morning to really get me going for the day. I always use more than the directions require to get more caffeine for that extra morning jolt. How much ground ...
7
votes
2answers
10k views

How can you measure the caffeine content of a liquid at home?

I saw a question on here about cold brew vs hot brew caffeine content and was wondering what is the easiest (or best) way to measure this at home (if possible)
5
votes
7answers
20k views

Does brewing tea for longer result in higher caffeine content?

The ISO standard for brewing tea says "6 minutes". Of course different teas have vastly different properties, but... For "average commodity black tea" and "average commodity green tea", will leaving ...
14
votes
3answers
10k views

Does black tea have the the highest level of caffeine? If so, why?

So it's usually said that tea in general has lower levels of caffeine than coffee and that black tea has more caffeine than green tea (which has more caffeine than white tea). This suggests that the ...
3
votes
3answers
366 views

Similar flavors to caffeine?

My wife and I enjoy drip coffee, french pressed coffee, espresso, black tea, green tea, and just about anything caffeinated. However, my wife wants to avoid caffeine due to its physiological effects. ...