Melt chocolate by breaking it into small pieces, placing it in a microwave-safe bowl, and heating at 50% power for 30 seconds, stirring every 15-20 seconds until smooth.

Combine the melted chocolate with mini marshmallows in a large mixing bowl, folding gently until evenly coated.

Spread the mixture onto a lined baking sheet into an even layer about ½ inch thick using a spatula.

Before the chocolate sets, add sprinkles on top and gently press them into the mixture.

Cool at room temperature for 30 to 60 minutes until firm, then cut into bite-sized pieces.