Important Parts of an Espresso Machine A high-quality espresso machine will create a shot of espresso with a rich body, a rich flavor and an strong aroma. This requires a high 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/gaggia-ri8425-22-grangaggia-deluxe-rot-premium-coffee-machine