Muddy Buddy Bars

Bahan-bahan (12 porsi)

• 6 cups rice Chex cereal
• 4 cups mini marshmallows
• 1 ½ cups semi-sweet chocolate chips
• ⅔ cup peanut butter
• 6 tablespoons salted butter
• 1 teaspoon vanilla extract
• ⅓ cup powdered sugar