aka: Peanut Butter Marshmallow Squares or Church Windows - These squares are one of my favorite childhood treats. The combination of creamy peanut butter, butterscotch chips, and rainbow fruit-flavored marshmallows are truly magical!
Put the bag of marshmallows in the freezer. Line an 8x8-inch pan with parchment paper. Once the marshmallows are frozen, proceed to step 2.
Melt the butterscotch chips, peanut butter, and butter in a medium saucepan over low heat, stirring until smooth.
Remove from the heat and let cool to ensure the marshmallows don't melt in next step.
Quickly fold in vanilla and frozen marshmallows. Spread the mixture into the prepared pan and gently spread with an offset spatula or spoon. Refrigerate until firm, about 1 hour.
Remove from the pan and slice into squares. Store squares covered in the refrigerator or freezer, Enjoy!