Post Holdings, which makes Honey Bunches of Oats and Grape-Nuts cereals, said it would buy Bob Evans Farms for about $1.5 billion, adding vegetable-based side dishes and breakfast sausages to its portfolio.
Bob Evans shares were up 5.6 percent in premarket trading, matching Post's offer of $77 per share.
The deal comes months after Post agreed to buy British breakfast cereal brand Weetabix for 1.4 billion pounds ($1.8 billion).
Bob Evans sells frozen foods such as refrigerated potato, pasta, and pork sausages under Bob Evans, Owens, Country Creek and Pineland Farms brands.
The company also has a foodservice business, representing about 35 percent of sales volume.
Post Holdings, which said it would fund the deal through cash on hand and debt, expects cost savings of $25 million following the deal.
The company said the transaction is expected to close by the end of Post's second quarter of fiscal 2018.
UBS Investment Bank, Barclays, Goldman Sachs and Bank of America/Merrill Lynch are Post's financial advisers.
J.P. Morgan Securities acted as an exclusive financial adviser to Bob Evans.