Coffee is a food source that fills the hunger bar a small amount and the energy bar to full. It requires a coffee cherry to be pressed, roasted and put in a cup. This makes it a hard to obtain food, but not impossible.
Needs: Coffee cherry, press, green coffee bean, electric stove (connected by copper wires to a steam generator and a flywheel to produce the energy for roasting the green coffee bean), roasted coffee bean, kiln, cup, bucket of water.
Coffee is a crafted foodstuff. Needs above.