Chocolate-Peanut Butter Mallow Bars

From Kraft Foods

1 pkg (2 layer size) devil's good cake mix
1/2 c (1 stick) butter, melted
2/3 c cold milk, divided
3/4 c creamy peanut butter
1 jar (7 oz) marshmallow creme
1.2 c. salted peanuts
6 squares semi-sweet chocolate, coarsely chopped

Heat over to 350. Mix dry cake mix, butter, and 1.3 c milk until blended; press two-thirds onto bottom of 13x9-inch pan. Bake 12 to 14 min or until center is almost set; cool 3 min.
Mix peanut butter and remaining milk; spread onto crust. Top with spoonfuls of marshmallow creme and remaining cake mixture. Sprinkle with nuts and chocolate; press gently into cake mixture.
Bake 18 mins or just until center is set. Cool before cutting into bars.