Confetti square made with rainbow marshmallows, butterscotch chips & peanut butter with a glass of milk and 2 squares in the background

Confetti Squares - AKA Peanut Butter Marshmallow Squares

Confetti squares are a super easy, 4 ingredient, no bake recipe. Also known as peanut butter marshmallow squares - these are soft, chewy, peanut butter-y and deliciously sweet! 

Course Dessert
Prep Time 15 minutes
Total Time 1 hour 15 minutes
Servings 16 squares
Calories 258 kcal
Author Fiona Dowling


  • 1/4 cup unsalted butter
  • 1 cup peanut butter
  • 1 bag butterscotch chips , 300g
  • 4-5 cup rainbow marshmallows


  1. Line an 8x8 or 9x9 inch pan with aluminium foil and lightly grease. 

  2. In a medium saucepan over low heat melt together the butter, peanut butter & butterscotch chips. 

  3. Stir occasionally until the mixture is smooth. 

  4. Remove from the heat and allow to cool to room temperature. 

  5. Stir in the marshmallows.

  6. Pour the batter into the prepared pan and set in the fridge to harden (about 1-2 hours).