01 - Line a baking sheet with parchment paper and set aside.
02 - Process Oreo cookies in a food processor until reduced to fine crumbs.
03 - Add softened cream cheese to the crumbs and process until completely combined into a thick, uniform dough.
04 - Scoop tablespoon-sized portions and roll into smooth balls. Arrange on the prepared baking sheet.
05 - Freeze the formed balls for 20 to 30 minutes until firm throughout.
06 - Melt white chocolate or candy melts in a microwave-safe bowl, stirring at 30-second intervals until completely smooth.
07 - Dip each chilled ball into melted chocolate, using a fork to lift and allowing excess coating to drip off before returning to the baking sheet.
08 - While coating remains unset, cut mini marshmallows diagonally for ears, dip sticky sides in pink sugar or gel, and attach to ball tops. Add chocolate chip eyes, heart sprinkle noses, and marshmallow tails.
09 - Refrigerate decorated balls for at least 30 minutes until coating is fully set.