1 (12 oz.) pkg. semi-sweet chocolate morsels
1 (14 oz.) sweetened condensed milk
2 tbsp. butter
2 c. dry roasted peanuts
1 (10 1/2 oz.) pkg. miniature marshmallows

In heavy saucepan over low heat, melt morsels with milk and butter; remove from heat. In large bowl, combine nuts and marshmallows; stir in chocolate mixture.

Spread in wax paper lined 13x9 pan. Chill until firm. Remove from pan. Peel off wax paper; cut into squares. Store loosely covered at room temperature.