If you want to make coffee for a lot of people cheaply and with almost no equipment, try this method from the 1850s. We asked the 2009 World Barista Champion Gwilym Davies to show us how to get the most out of this classic recipe. As he says, ‘All you need is some beans, a grinder, a pot, and a spoon, and you can brew coffee for 20 people in less than 10 minutes.’