The Edinburgh outlet will be the third in the UK for the business, which has restaurants in Norwich and Brighton.
Erpingham House will open in the Bonnie & Wild Scottish Marketplace - the upmarket food court located within the St James development.
It'll join restaurants from Glasgow's The Gannet team, who are due to open their first Capital restaurant, and chef Gary Maclean's first solo venture, Creel Caught.
Erpingham House was founded in 2018 by entrepreneur Loui Blake footballers Russell Martin and Declan Rudd, and has an ethos of sustainability through their dishes and packaging.
The Edinburgh restaurant will have the same 100 per cent plant-based, plastic-free and mostly gluten-free menu of modern vegan food, created by group head chef Meg Greenacre.
Bonnie & Wild is billed as the largest single food and drink site in Scotland thanks to its 16,600 sq ft open plan space within the new development.
There is space for 700 diners, who can sit anywhere and order from the different restaurants or food stalls.
Bonnie & Wild is due to open on June 24 alongside much of the St James Quarter.