LINE baking sheets with wax paper.
MELT morsels, butter and large marshmallows in large saucepan over low heat, stirring until smooth. Remove from heat; cool slightly. Stir in vanilla extract. Stir in oats and remaining ingredients.
DROP by rounded teaspoonfuls onto prepared sheets. Cover and refrigerate for 2 to 3 hours. Let stand at room temperature about 15 minutes before serving. Store tightly covered in refrigerator.