It follows the resignation of Anthony Hobson, non-executive chairman of the company, of the company. Directors David Nish, Orna Ni-Chionna, Tony Illsley and Sandra Turner also stepped down.
Boparan has now become chairman with Baljinder Boparan, Kuldip Kular, Jon Silk and Graham Hunter all becoming new directors.
The board room shake-up brings to a conclusion the long-running saga over the future of Northern Foods. Boparan received approval from regulators for his takeover move to go ahead last week after he beat Irish business Greencore to clinch a deal with the business.
Boparan, a West Midlands-based entrepreneur, plans to delist Northern Foods, which has been a publicly listed business for 55 years. He already owns supermarket chicken supplier 2 Sisters and the Harry Ramsden's chain.