Brew ratio
Brew ratio is the exact proportion defining the relationship between the dry coffee used and the total amount of water. It works much like making a homemade syrup, where we need to know how many grams of one ingredient correspond to another to achieve the right consistency. Behind the bar, beans are never scooped by guess, but a scale is used to control this variable, for example, by maintaining a steady split of one gram of coffee to fifteen grams of water. Changing just this proportion is the easiest way for a barista to make the resulting drink more delicate in taste or give it a much thicker structure.
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