In a large mixing bowl, pour in 12 cups of Rice Chex cereal, ensuring it’s broken into smaller pieces without any crushing.

In a double boiler over low heat, melt 6 tablespoons of unsalted butter, stirring occasionally. Once melted, add 1½ cups of semi-sweet chocolate chips and ¾ cup of creamy peanut butter, stirring continuously until smooth.

Stir in 1 teaspoon of vanilla extract after blending chocolate and peanut butter.

Drizzle the warm chocolate-peanut butter mixture over the Rice Chex and gently fold for even coverage.

Divide the mixture into two heavy-duty zipper bags, add ½ cup of powdered sugar to each, seal, and shake until coated.

Spread the coated cereal onto a baking sheet lined with parchment paper and sprinkle with additional powdered sugar and kosher salt.

Incorporate ½ cup of Reese's Pieces into the cereal, folding gently to mix.