The sharing of food is akin to the sharing of one's heart, and Patsy Caldwell and Amy Lyles Wilson can think of no better way to "be sweet." There are myriad ways to "be sweet" such as volunteering at the homeless shelter, remembering an aunt's birthday, and writing thank-you notes. Then, there is food: baking a pie for a new neighbor, icing a cake for a coworker who is ill, or mixing up a batch of brownies for a family gathering. These...