1Place corn (in husks) in large container; cover with cold water. Let stand 2 hours.
2In small bowl, mix Garlic-Cilantro Butter ingredients. Cover; refrigerate until serving.
3Heat gas or charcoal grill. Place corn (in husks) on grill over medium heat. Cover grill; cook 20 to 30 minutes, turning occasionally, until corn is tender. Remove husks from corn. Serve corn with Garlic-Cilantro Butter.