In a microwave-safe bowl, combine the semi-sweet baking chocolate and creamy peanut butter. Heat them in the microwave in 30-second intervals, stirring between each session until smooth.

In a large mixing bowl, place your Corn or Rice Chex cereal. Once your chocolate-peanut butter mixture is ready, pour it over the cereal. Gently toss until all pieces are evenly coated.

Take 12 of the fun-sized Butterfinger bars and finely chop them into small pieces. Keep 4 aside for later decoration.

Add the crushed Butterfinger pieces to the coated cereal mix and stir gently until fully incorporated.

In a large resealable plastic bag, combine half of your powdered sugar with the chocolate-coated cereal mixture. Seal tightly and shake gently until everything is well-coated in sugar.

Spread your finished Butterfinger Muddy Buddies onto a baking sheet lined with parchment paper and allow them to cool completely. Sprinkle the remaining crushed Butterfinger bars on top before serving.