Liquid Malt extract or LME is typically used in extract beer brewing, yeast starters, and in some cases, all grain brewing. To make liquid malt extract, the sugars from a brewing mash are transferred from a mash tun or lauter tun and dehydrated and reduced in a vacuum chamber. When the process is completed, the liquid malt extract is only 20% water. Typically, hops are not added to a malt extract.