Spray the crockpot with nonstick spray.
Place 12 ounces white melting chocolate, 2 cups chow mein noodles, and 1 cup peanuts in the crockpot.
Cook on HIGH for 1 hour, or until the chocolate is completely melted.
Stir the contents together until the chocolate evenly coats the noodles and peanuts.
Drop spoonfuls of the mixture onto a baking sheet lined with parchment paper.
Sprinkle 2 tablespoons sprinkles over the spoonfuls before the chocolate hardens.
Chill until set, then serve.