-
Preheat oven to 300F. Line a large, rimmed baking sheet with parchment paper or spray with oil.
-
Place cereal in a large mixing bowl. Set aside.
-
Melt butter on very low heat (or in the microwave). Remove from heat and stir in pudding mix until pudding has dissolved. Pour over cereal and toss gently, making sure each piece of cereal is coated. Pour onto prepared baking sheet.
-
Bake 15 minutes, stirring halfway through.
-
Stir in Oreos and gummy worms. Spread mixture onto wax paper to cool completely before serving.