In coffee, “emulsion” typically refers to the suspension of coffee oils in water. While brewed coffeeBrewed Coffee refers to all coffee preparations produced by adding non-pressurized water to coffee grounds. Contrasted with espresso coffee, which is produced under pressure, brewed coffee is primarily... is primarily an extractionRefers to the process of infusing coffee with hot water. Hot water releases or "extracts" the flavor from the roasted, ground coffee. The term is used mostly with..., espressoA small coffee beverage, about 20 ml, prepared on an espresso machine where pressurized hot water extracted through compressed coffee.: In its most stripped-down, basic form, this is... is both an extraction and an emulsion because it occurs under pressure.