In a large sauce pan melt your butter and peanut butter over low heat.

Still on low heat, add the marshmallows to the mixture and stir until marshmallows are melted.

Remove from heat and stir in your rice krispies and chopped Nutter Butter cookies.

When combined, pour mixture into prepared pan and press evenly.

Allow to cool, about 20-30 minutes and cut into squares.