The upmarket cocktail bar, which has a site in the Trinity Centre and in Greek Street, is offering a free colour-changing cocktail to people that donate a non-perishable food item.
It is part of a joint initiative between the The Alchemist, vodka brand Grey Goose and social enterprise Foodinate.
The move is in response to the increase in people relying on food banks since the Covid-19 pandemic began.
Approximately,100,000 households began using foodbanks for the very first time over lockdown, according to the Trussell Trust.
Foodbank usage is expected to increase further in usage over the Christmas period.
The swap event will be held on Tuesday, October 13.
It is one cocktail exchange per person, but larger donations are welcome.
Tinned, dried and packaged foods will be accepted but they must be unopened and in date.
The Alchemist Trinity and Greek Street will accept food items throughout the day and will be respecting distancing measures by offering a takeaway cocktail for those unable to enjoy in the venue.
All donations will then be taken to Raise – St Anne’s Community Service to help those in need.
Tackling food poverty has been a long-term passion for The Alchemist.
Last year’s Swap Shop initiative saw over 3,000 donations collected.
The brand has been partnered with Foodinate since May 2018 and provides hot and nourishing meals for those in need in local communities when guests order any menu items marked with the Foodinate fork logo.
To date they have provided 65,000 meals for the social enterprise.
Hannah Plumb, Culture and Talent Director at The Alchemist said: "We love the work carried out by Foodinate. It’s a truly fantastic initiative tackling food poverty across the country which is an issue we’re passionate about at The Alchemist.
"The Swap Shop is a fun and engaging way to encourage customers to donate to their local food banks, who need our support now more than ever.”