Brew in a Bag Popularizes All-Grain Homebrewing

Around 2005, Australian homebrewers including Patrick Hollingdale began systematically documenting and promoting Brew in a Bag, commonly abbreviated BIAB. Earlier brewers had mashed grain in fabric bags, but Hollingdale and contributors to the AussieHomeBrewer forum developed the method into an accessible, repeatable approach to all-grain brewing. BIAB uses a porous bag inside a single kettle for full-volume mashing. After the mash, the brewer removes the bag and boils the wort in the same vessel, reducing the equipment, space, and cost traditionally associated with multi-vessel all-grain systems. The method spread internationally and helped make all-grain brewing more accessible while also anticipating later all-in-one systems that replaced the fabric bag with a metal grain basket.