1. Place cereal in a large bowl and set aside.

2. In a microwave proof bowl, melt chocolate and butter and stir until smooth.

3. Add finely chopped pistachios to melted chocolate and stir.

4. Pour over cereal and gently fold until coated.

5. Dump into a large plastic bag and add powdered sugar and shake until covered. (If you don't have a large plastic bag, you can use a large tupperware or pot with a lid to shake the powdered sugar and cereal in.)

6. Dump onto a cookie sheet to let cool.

7. Add additional pistachios if desired.