Melt butter and peanut butter in large pan. As both melt, blend marshmallows in with wire whisk over low heat till marshmallows are melted. Stir in vanilla. Remove from heat and gently stir in Rice Krispies, nuts and peanuts.(i like a wooden spoon) As treats begin to cool, stir in butterscotch chips and spread in a greased 9x13 pan. cool slightly and cut into squares.