1. Heat brownie mix in the microwave for 3-5 minutes until it reaches 165°F. Set aside.
2. Melt chocolate chips, peanut butter, and butter in the microwave. Stir in vanilla.
3. Coat Rice Chex in the melted mixture, then toss with the brownie mix in a plastic bag.
4. Spread on a baking sheet to cool before serving.

**Prep Time: 10 mins | Total Time: 10 mins | Servings: 7**