Mash Brewing Company is an Australian microbrewery in Henley Brook, located within the Swan Valley region of Western Australia.

Mash Brewing opened in April 2006,[1] one of a number of craft breweries operating in the Swan Valley.

Owned by Brad Cox, the brewery is located behind the main bar and the open working area allows customers to view the brewing activities.

[2][3] In mid-2008, the company opened Mash Bunbury,[4] a scaled-down version of their Swan Valley operation, including a 100-litre microbrewery that produces seasonal beers for the venue, served on tap together with the full range of Mash beers.

In November 2011, a new team,[5] headed by brewer Charlie Hodgson, was brought in and set about reinventing the Brewery's beer range.