In a microwave or heavy saucepan, heat chocolate chips, milk and Marshmallow Crème just until melted; stir until smooth (mixture will be thick).
With tongs, immediately dip marshmallows, one at a time, in chocolate mixture. Shake off excess chocolate; quickly roll in pecans. Place on wax paper-lined baking sheets. (Reheat chocolate mixture if necessary for easier coating.) Refrigerate until firm. Store in the refrigerator in an airtight container.