Public health advocates and some mayors are sounding the alarm over Lazy Cakes, a brownie adorned with a lackadaisical cartoon character and laced with a powerful sleep aid that has sold millions nationwide. “Children are attracted to brownies,” said Dr. Caroline Apovian, director of the Nutrition and Weight Management Center at Boston Medical Center. “I don’t think it’s appropriate to put herbal things that are actually drugs in brownies or food items that are attractive to children. I think that’s heinous.” One Lazy Cake, which is wrapped in plastic with a photo of a smiling cartoon brownie, contains 8 mg...