This won't be haute cuisine unfortunately, but I am kind of stuck. I want to bake some snacks, but have only access to water, flour and sugar (student, between two jobs, need to save). I'm pretty sure I can make something "edible" out of it, that I could then dip into peanut butter, jelly, or whatever I have laying around here.  The only requirements are:   need to use only water, flour, and sugar/salt (no baking powder, or eggs) edible (crackers-like things are ok, but no rock-like things) doesn't have to taste great, or even to have a taste at all   So, what is your most simple and minimalist recipe available?  Thanks! 
This is called a pressurized portafilter. As you found on coffeegeek, it is designed to enhance production of crema. The Coffee Geeks look down on this device, since it produces what is essentially "fake" crema - even with old, stale pre-ground coffee.  If all you want to drink are lattes, it does not make much difference. If you want to taste decent espresso, then you must use a non-pressurized portafilter - even if you are a non-professional.   Making espresso is not a slam dunk - especially with a consumer machine like the Gaggia. You will learn to improve your espresso shots by analyzing your technique. This often is based on the appearance of the crema during and after the shot is drawn.   Since the pressurized portafilter gives you misleading information on the actual crema, you will have difficulty learning how to make a good espresso. 