Coffee brewing is all about using hot water to extract the soluble compounds in roasted coffee. Whichever method you choose, extraction is the primary process. When dissolved in water, these compounds eventually define the coffee's aroma and flavour profile. Understanding this relationship between extraction and flavour is a fundamental part of brewing.
The craft involved in brewing a great cup of coffee is working out how to manage and control the extraction process, allowing the flavours of the coffee to make it into the cup. For this to happen, there are a few key factors: (i) grind size; (ii) water temperature; and (iii) time.