In 1986, when entrepreneurs Aaron and Michael Serruya were twentysomethings, they opened their first Yogen Fruz store, in Toronto. Today, the brothers have more than 1,000 locations around the world.

Prepare for birthday cake cones to become a part of the same empire that oversees Yogen Fruz, Yogurty’s, and Pinkberry, the considerably less fun-sounding International Franchising Inc. Sweet ...