Dunkin’ Brands Group Inc., the Canton-based parent of the Dunkin’ Donuts and Baskin-Robbins, announced Friday that executive chef Stan Frankenthaler has been honored as the 2012 MenuMasters Innovator of the Year. Frankenthaler was recognized for the culinary innovation that he has led for both Dunkin’ Donuts and Baskin-Robbins. Under Frankenthaler’s watch, Dunkin’ devised such new menu items as the Big N’ Toasted Breakfast Sandwich, Sausage Pancake Bites, and Bagel Twists. Meanwhile, on the ice cream front, Baskin-Robbins unveiled such new flavors as Superfudge Truffle and French Toast.