1 (16 oz.) jar dry roasted peanuts
4 tbsp. butter
1 (12 oz.) pkg. Reese's peanut butter chips
1 can sweetened condensed milk
1 pkg. marshmallows

Pour 1/2 of the peanuts into the bottom of a greased 9 x 13 inch pan. Melt butter with the peanut butter chips, stir in the sweetened condensed milk. Remove from heat. Add the marshmallows. Pour all over the peanuts in pan. Top with remaining peanuts. Cool and cut into bars.