Slice pound cake slice crosswise in half forming 2 slices. Spread one slice of frozen pound cake with peanut butter and marshmallow cream; sprinkle with chocolate chips; top with second pound cake slice forming a sandwich.
Spray both sides of pound cake slices with cooking spray. Grill sandwich in a skillet over medium heat about 1-2 minutes per side or until crisp and toasted. OR, Place on a microwave-safe plate and heat sandwich 20-30 seconds or until chocolate chips are melted.