In about 30 seconds, nearly boiling water is forced through a compressed puck of finely ground coffee at high pressure. The result is a 1-ounce drink called a “shot.”
Prepare your portafilter. It should be clean, dry and hot.
Set the grind. You'll want a very find grand with particles around 0.88 mm in diameter.
Dose the shot. You'll want center-fill the basket to 9 grams for a single shot.
Level and tamp! Tap the outside of the portafilter and rest the leading edge on a flat counter. Use the tamper to press down firmly.
Pull the shot! Let the shot run for 25-30 seconds.
Watch and learn! Seeing how the coffee flows and the color, etc will help you improve your technique.