CANTON, MASS — Dunkin’ Donuts has added buttermilk biscuits to its oven-toasted menu. The new sausage, egg and cheese biscuit sandwich features scrambled eggs, American cheese and breakfast sausage between a buttery, oven-toasted biscuit. The item is available nationwide and has a suggested retail price of $2.99. In select markets, a sausage biscuit breakfast sandwich also will be available for 99c with the purchase of any beverage at participating shops through Oct. 6. "Our customers look to Dunkin’ Donuts for new and innovative ways to enjoy their favorite breakfast sandwiches," said Frances Allen, brand marketing officer for Dunkin’ Donuts. "The biscuit is yet another choice we offer busy, on-the-go customers seeking delicious breakfasts made exactly the way they want it and at a great price."