Important Parts of an Espresso Machine A top espresso machine should give a rich and strong shot of coffee, with a full-bodied flavor and intense aroma. This requires high levels of temperature and pressure. Pay focus on the crema. This golden-brown layer gives rich espressos their characteristic flavor and color. https://www.coffeee.uk/products/swan-retro-pump-espresso-coffee-machine-blue-milk-frother