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Roasted coffee beans from the species C. liberica

Freshly picked coffee beans from the species ‎C. canephora

Coffea robusta before and during the processing stage.

An espresso machine brews coffee by forcing pressurized water near boiling point through a "puck" of ground coffee and a filter in order to produce a thick, concentrated coffee called espresso.

An espresso machine may also have a steam wand which…

Coffee is brewed by placing coarsely ground coffee in the empty beaker and adding hot—between 93–96 °C (199–205 °F)—water, in proportions of about 30 g (1.1 oz) of coffee grounds to 500 ml (17 US fl oz) of water, more or less to taste. The…

The pour over method involves pouring hot water through coffee grounds in a filter. The water drains through the coffee and filter into a carafe or mug.

This process is unique from drip coffee in that the water is hand-poured from a kettle over…

Drip coffee is perhaps the most common form of coffee brewing. Drip coffee machines use a filter filled with coffee grounds and a chamber of water. As the water boils, it vaporizes and "drips" over the beans, percolating into a carafe.

Drip…

A coffee percolator consists of a pot with a small chamber at the bottom which is placed close to the heat source (stove top or electric burner). A vertical tube leads from this chamber to the top of the percolator. Just below the upper end of this…

The AeroPress plunger uses pressure to push hot espresso into a mug. Adding water to the espresso creates a normal American coffee, and milk can be added to create lattes and other mixed coffee drinks.

In siphon coffee pots, two chambers are used to mix water and coffee grounds to brew coffee. The first chamber is filled with water. When the lower chamber is heated, vapor pressure forces the water to rise into the upper chamber. Here the vapor is…