The brewery's own Movember Tash Society has created Mo-Teezer – a 4.3% light ale with a creamy head to tease the tash.
Mo-Teezer will be ready just in time for the Brewery’s annual Celtic Beer Festival held in the historic cellars of the atmospheric Victorian brewery building on 23 November.
Since 2009, the brewery's Movember Tash Society has raised more than £1,500 for men’s health.
Rob Orton, brewing team leader at St Austell, said: "I wanted to create a manly beer, a real winter warmer with a full reddy colour.
"It’ll be around 4.3%, and will be an easy drinking ale with a creamy head that we hope will sit nicely on the tash. It’s a limited edition brew, so once it’s gone, it’s gone."
Movember aims to raise awareness of testicular and prostate cancers by getting participants sponsored for growing a mustache for the entire month of November.