Butter a 9 x 13 inch baking dish.
Melt the softened butter in a large saucepan on low heat; add marshmallows and cook, while stirring until melted, about 6 to 8 minutes.
Add chocolate and cook while stirring, until melted, about 2 to 4 minutes. Remove from heat and immediately fold in the Rice Crispies and peanut and butter chips until evenly mixed.
Spread mixture evenly into the baking dish, allow to completely cool, about 15 minutes. Then cut into desired size squares.
By Deeli from Richland, WA