The agency said it would commence work on developing new logos, menu design and signage system for the national chain.
Orchid Pubs' said it wished to re-interpret the traditional carvery image of "overcooked meat and curled up vegetables" to emphasise fresh, locally sourced food.
It is understood that work for the redesign will begin immediately, with a view to rolling out the newly designed eateries later this year.
Lin Dickens, managing director of Aricot Vert, said: "It's a great opportunity to redefine a very traditional offer -- everyone loves a roast dinner."
Aricot Vert has in the past created the brand identity for Juicy Lucy's, the Alpha Retail-owned organically themed coffee and juice bar at Manchester Airport.