Ingredients:

  • 6 tablespoons (85g) unsalted butter
  • 10 ounces (283g) miniature marshmallows
  • 1/2 cup (125g) creamy peanut butter
  • 1 teaspoon vanilla extract
  • 6 cups crisped rice cereal (e.g., Rice Krispies)
  • 1 cup semi-sweet chocolate chips (for drizzle)
  • 2 tablespoons smooth peanut butter (for drizzle)

Instructions:

  1. Line a 9x13 inch baking pan completely with parchment paper, ensuring there is an overhang on the sides for easy lifting later. Lightly grease the parchment paper.
  2. In a large, heavy-bottomed saucepan over low heat, melt the butter until just liquid. Add the 1/2 cup of creamy peanut butter and stir constantly until smooth and fully combined. Keep the heat very low to prevent scorching.
  3. Remove the pan from the heat immediately. Add all the marshmallows at once and stir gently until the mixture is completely melted and smooth.
  4. Stir in the vanilla extract. Pour the warm marshmallow mixture over the crisped rice cereal in a large mixing bowl.
  5. Using a spatula, gently fold the cereal into the marshmallow mixture until it is evenly coated. Do not overmix, as this can lead to tough bars.
  6. Transfer the mixture to the prepared pan. Lightly grease your hands or a spatula and gently press the mixture evenly into the pan. Avoid packing it down too tightly.
  7. Allow the treats to cool completely at room temperature for a minimum of 1.5 to 2 hours, or place in the refrigerator for 1 hour to speed setting.
  8. For the optional drizzle: Melt the chocolate chips and the 2 tablespoons of peanut butter together gently (using a double boiler or microwave in 30-second bursts) until smooth. Drizzle decoratively over the set squares.
  9. Once fully set, use the parchment paper overhang to lift the slab out of the pan. Cut into 16 squares using a large, sharp knife.