This Bar is a favorite childhood memory. My mom would occasionally make these when we had company...they were always my favorite treat. I can remember sneaking them from the frig., so that's where that bad habit came from! Shame on me! lol
They are like eating fudge, but more airy because the marshmellows don't melt. :o)
In a large microwavable bowl, place butter, peanut butter, chocolate chips and butterscotch chips. Microwave 1 1/2 minutes, stir and microwave 30 seconds if not smooth and creamy, microwave another 30 seconds then 15 seconds at a time until its smooth and creamy, stirring well.
When smooth and creamy, allow to cool slightly if needed, then add marshmallows, coconut and nuts. Stir to mix well. Pour into prepared pan and spread to cover bottom. Sprinkle with more coconut if desired. Cool in refrigerator until firm about 1/2 hour. Cut and store in refrigerator.