Preparing a cup of coffee in a Moka Pot is easy. Fill in the base of your Moka Pot with hot or warm water up to the inner line. You can use cold water too, but this means it will take longer. Place the filter funnel onto the base and fill it to the top with espresso grind coffee. Screw on tight and place on the heat source. When you hear a fizzing sound, take it off the heat and serve!