1 can (12 ounces) evaporated milk
1 cup butter or margarine
1 jar (7 ounces) marshmallow cream
3 (6 ounce) packages semisweet chocolate chips
1 tablespoon vanilla
1 cup peanut butter
Combine sugar, milk and butter in a heavy saucepan; bring to a boil and cook for 8 minutes, stirring constantly. Add marshmallow cream, chocolate chips and vanilla; stir to blend. Pour half of mixture into a buttered 13 x 9 x 2-inch pan; dollop with spoonfuls of peanut butter. Spoon remaining chocolate mixture over the peanut butter. Gently swirl the mixture with a knife to create a marble effect. Chill until firm; cut into 1-inch pieces and store in an airtight container in the refrigerator.
Makes about 5 pounds