Cold brew coffee charged with nitrogen is becoming a popular addition to coffee shop menus.
And what makes this beverage different are the tiny bubbles and creamy head.
Buffy Gorrilla takes stock of a growing trend in this audio report.
► Tim Page-Walker; brewer and founder of Coffee Keg
► Brian Beardsmore; managing director of Sovereign Quality Services
► Kieran Pates; head barista, Axil Coffee Roasters
► Mike Sullivan; green buyer, Aunty Peg’s