In a large bowl stir together Rice Krispies and dry roasted nuts.
Place white chocolate chips in a medium microwave safe bowl.
Microwave in 20 second intervals, stirring in between, until melted.
Stir peanut butter into the melted chocolate until well combined.
Pour white chocolate mixture over Rice Krispies mixture and stir carefully until Rice Krispies are thoroughly coated.
Scoop mixture into individual cups and top with sprinkles or nonpareils or spread out on a wax paper lined baking sheet until dry. Then break into chunks.
Store in an airtight container.