Chocolate-Peanut Butter Mallow Bars

I got this recipe from Kraft foods magazine. It is also on Kraftfoods.com. My family really enjoyed these. The boys picked the peanuts off of their pieces, so next time I'd make half with and half with-out the peanuts. Also...my grocery store was out of BAKER'S Semi-Sweet Chocolate, so I substituted and approx. equivalent of semi-sweet chocolate chips.

Chocolate-Peanut Butter Mallow Bars

Ingredients:

• 1 pkg. (2-layer size) devil's food cake mix
• 1/2 cup (1 stick) butter, melted
• 2/3 cup milk, divided
• 3/4 cup creamy peanut butter
• 1 jar (7 oz.) JET-PUFFED Marshmallow Creme
• 1/2 cup PLANTERS Salted Peanuts
• 6 squares BAKER'S Semi-Sweet Chocolate, coarsely chopped

Directions:
HEAT oven to 350°F. Mix dry cake mix, butter and 1/3 cup milk until blended; press 2/3 onto bottom of 13x9-inch pan. Bake 12 to 14 min. or until center is almost set; cool 3 min. Meanwhile, mix peanut butter and remaining milk.
SPREAD peanut butter mixture onto crust; top with small spoonfuls of the marshmallow creme and remaining cake mixture. Sprinkle with nuts and chocolate; press gently into cake mixture.
BAKE 18 min. or just until center is set. Cool completely before cutting into bars.