Supermarkets’ cake mix shelves feature the Big Three. There’s Pillsbury, whose Doughboy is a cartoon character. There’s Betty Crocker; sure, her pretty face is on the box, but it’s a portrait drawn ...

Pillsbury with its Doughboy, Betty Crocker and Duncan Hines — only the latter was an actual person. Yet he personally ...

Hines was a tough customer. He demanded spick-and-span spotlessness (personally inspecting every kitchen), prompt, polite ...