Important Parts of an Espresso Machine A high-quality espresso machine will deliver a thick and powerful shot of coffee, with a full aroma and a strong flavor. This requires a high pressure and temperature. Pay focus on the crema. This golden-brown layer gives rich espressos their characteristic taste and color. https://www.coffeee.uk/products/quest-36569-espresso-machine-with-milk-frother-15-bars-pressure