Place chocolate chips in a small bowl. In a small saucepan, bring cream just to a boil. Pour over chocolate; stir with a whisk until smooth. Cool to room temperature or until mixture reaches a spreading consistency, about 10 minutes.
Spread chocolate mixture over half of the graham crackers. Spread marshmallow creme over remaining graham crackers; place over chocolate-covered crackers, pressing to adhere.
Melt dipping chocolate according to package directions. Dip each s'more halfway into dipping chocolate; allow excess to drip off. Place on waxed paper-lined baking sheets; let stand until dipping chocolate is set.
If desired, drizzle tops with melted white candy coating; let stand until set. Store in an airtight container in the refrigerator.
Test Kitchen Tips Keep on whisking! At first, the chocolate and cream mixture may look separated. But don't panic—it will smooth out with plenty of whisking. For a hint of richer flavour, mix peanut butter into the marshmallow creme. A tablespoon or two should do it.