What is Espresso?In explaining coffee to the general public, us industry-folk go to a lot of trouble to compare it to other foods products. I often compare dark roasts to over-cooked meat, talk about the body of a cup in relation to different varietals of wine, explain roasting by likening it to popping popcorn, and we are all guilty of using different fruits, vegetables and chocolates when describing the flavour profile of a particular coffee...