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Question: Can you use cold water  to make the espresso???? Thanks
Document: There seems to be a critical water to grounds ratio that controls the flavor. Using water that is not too hot also prevents some of the acids and other bitterness from coming out. I end up with a very smooth, bold flavored coffee.Obviously, after brewing the two ounce espresso-like shot, you can top up the cup with hotter water for a hot cup, or even use some ice and cold water for iced coffee. Brewing a cooler, more concentrated cup this way allows ice to not dilute the result so much, and you can have that iced coffee immediately without waiting for the brew to cool.Apparently, regular drip machines make poor coffee because the distributor runs so much very hot water over the same grounds for some time, over-extracting some chemicals that add to bitterness and acidity.
This thing makes an absolutely fantastic cup of coffee! It's fast, easy, and cleans up practically by itself! We have had drip machines, French presses, stovetop espresso makers, and cold-brew systems. I haven't made coffee any other way since this little wonder arrived. The coffee it makes is flavorful and aromatic, but low on acid and tastes just fantastic. We use it to make Americanos, almost exclusively. A 3-shot batch makes an absolutely perfect "huge mug" of coffee.
If you read up on the cold brew devices, they also use much less water, and make a concentrate that is later diluted to make a standard cup of coffee. My method is similar, but a little faster since it uses warm water to speed up the process.Enjoy, hope yours comes out as good as mine.
You can press 2-3-4 shots with this small plastic press. Yes, it requires some time, but it worth it. Now I can make my coffee when I'm camping and don't have electricity. Follow AeroPress instructions (especially about water temperature) and your coffee will taste great!Bottom line: this press can bit any other coffee maker for it price. It's plastic but very well built. Thanks Aerobie!~~~~~~~~~~~~~
That said, it doesn't make a "true" espresso -- but a pretty good everyday approximation. Nor does it deliver the chewy and silty complexities of a french press -- but it does offer a very pleasant alternative. Thanks to the zealots on this site I have learned that temperature is key to the consequences and you really do need either extraordinary patience or a Bonavita thermostat-controlled kettle to deliver the precise temperature neededBonavita 1-Liter Variable Temperature Digital Electric Gooseneck Kettle. In my case it's settled at 176 degrees As other reviewers have noted, the grind can be less precise and probably doesn't require a burr -- but temperature does need to be carefully controlled.This one is (so far anyway) the winner for me as an everyday coffee maker.
I just received my aeropress and am still working with it, but love it so far. Contrary to what I read in previous reviews, the instructions are in English and very simple. The strength of the coffee depend on the amount of coffee and water used, remember it is designed to make a concentrate. If using cold water, I mix the coffee grounds and water in a glass and let them soak for awhile then pour them thru the press combining the toddy method and the press. By squeezing the grounds, more of the flavor is released.
This coffee maker is easy to use, cleans quickly, and makes a great cup of coffee. Play around with the coarseness of the coffee to dial in the coffee strength you like instead of just adding more coffee grinds. Putting in water that just boiled will burn the coffee so follow the recommended 80 degrees Celsius that Areopress suggests; I just add a bit of cold water to the kettle and that does the trick without using a thermometer.
It's makes coffee like it should, but I can't seem to make it taste very good. I assume that I just don't know how to use it the best way yet. For my money, the cold drip is still the best option -- coffee toddy.
Surprisingly, I believe the amount of water is the most critical with temperature being second. I have combined the use of my AeroPress with the idea of the recent popularity of cold brewing by using water that is only warm (about 150 deg F) and not more than about 2 ounces of water per scoop of coffee. (2 oz is about what the AeroPress is marked to allow per cup)  I allow it to brew about 40 to 60 seconds, stirring the whole time before pressing out what is left. This may seem like a long time to French press users, but since so little water is used, and the temperature is low, it works perfectly.
Thank you amazon.com,Aeropres Coffee and Espresso maker very good and excellence,I like it.I used every morning when I wake up,Thanks again.
Answer: Yes.  It won't be as robust or bitey as when using hot water, and you may want to try the "upside down" method to let the grounds steep for a while.  Check Youtube videos to clarify.