Cilantro Lime Corn

Cilantro Lime Corn / 8 tablespoons (1 stick) unsalted butter, softened, 1 tablespoon freshly squeezed lime juice, 1/2 teaspoon lime zest, 1/2 teaspoon sugar, 1/2 teaspoon salt, 1/4 cup chopped fresh cilantro, 12 ears fresh corn, shucked.