Pour cereal into a large mixing bowl; set aside.
Pour protein powder, collagen peptides, powdered sugar and crushed cookies into a gallon sized resealable ziplock bag; seal and shake to combine.
In a microwave safe bowl, add white chocolate chips and cookie butter and microwave for 2 minutes, stirring halfway through.
Stir until chocolate chips have melted and the mixture is smooth.
Pour chocolate mixture over cereal and toss until evenly coated.
Carefully pour coated cereal mixture into the bag, seal and shake until well coated.