Making stovetop espresso with a Moka pot is simple. Fill the lower chamber with cold water up to the valve. Next, fill the filter funnel with coarse grind coffee. The coffee should be even with the top of the filter. Screw the top onto the base, place the Moka pot on the stove over medium heat, and let the water boil. The pressure will push the water up through the coffee grounds into the top chamber. Once the sound of bubbling and brewing stops, your stovetop espresso coffee is ready to be served.