It's a popular misconception that Espresso and other dark roasted coffee's have more caffeine. In reality, they contain far less caffeine then the lighter roasts because the roasting process caramelizes the caffeine. A cup of Espresso contains about 40mg of caffeine compared to the stuff you brew at home which contains 85mg.
With Starbucks, It's all about keeping the beans as green as possible then burning the coffee really fast in the roasting process. This gives the process its distinctive flavor (described by many as "like ass") but it does keep the cafination intact and at really high levels. Mind you your home brew sounds like a monster. Do you use a kettle or do you have to use a cauldron to brew that stuff... ;-)
And as for Timmy's being the most caffeine you can get for under $2. Its cheaper to invest in a good thermos and brew your own...not that I don't enjoy a good Tim's coffee every so often but my coffee consumption could put me in the poor house if I didn't make the majority myself.
I almost went bankrupt working in Toronto. My consultants always had to have meetings in a coffee shop, and at $5 a coffee I was burning about $60-100 a month on coffee before I put an end to it. :|
I don't know how to make coffee well - my coffee is undrinkable which is why I didn't offer to make it... Actually I don't even drink it anymore. I'm addicted to tea of all types, and drink about 2 litres a day now. I even put it in frosty plastic mugs so I can start drinking it immediately.
I don't really drink any more. Honestly. But on the occasions that I do, I really like to enjoy it, so I only drink stuff that tastes good. Having been a bartender I know what that stuff is and how to make it. I could turn Scramble alcoholic with my patented "tootsie roll"...
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