01 -
Line an 8x8 inch baking pan with parchment paper, leaving enough overhang on the sides to lift the bars out later. Spray lightly with non-stick spray.
02 -
In a medium saucepan over medium-low heat, add the butter, peanut butter, and butterscotch chips. Stir constantly until melted and smooth.
03 -
Stir in the vanilla extract and remove from heat. Let the mixture cool for 2 to 3 minutes so it doesn't melt the marshmallows when you mix them in.
04 -
Put the mini marshmallows in a large mixing bowl. Pour the slightly cooled peanut butter mixture over them and gently fold together until all the marshmallows are evenly coated.
05 -
Transfer the mixture to the prepared pan and spread it into an even layer.
06 -
Refrigerate for 1½ to 2 hours until completely firm.
07 -
Lift the bars out of the pan using the parchment overhang and place on a cutting board. Cut into 16 squares with a large sharp knife. For clean cuts, run the knife under hot water and wipe it between slices.