Making espresso is actually a delicate and complex process. The process involves forcing hot water through tightly ground and tightly packed coffee. About an ounce and a half of hot water is used. The resulting coffee should be a thick and dark brown and have a small amount of foam on top, something commonly called crema. Not every coffee shop makes espresso the same way. This is why it is important to have one’s own machine at home. This allows people to make espresso how they like it. After all, why pay for someone else to make espresso when one could do this themselves?