1 18 oz pkg white cake mix, dry
1/3 cup oil
1 14 oz can sweetened condensed milk
1 cup semi sweet chocolate chips
1/4 cup butter or margarine(cut into small pieces)
Directions: Preheat oven to 350 degrees. Combine dry cake mix, eggs, & oil. With floured hands, press 2/3 of cake mixture into greased 13x9" baking pan. In microwave safe bowl, microwave sweetened condensed milk, chocolate chips, & butter 45 seconds, stir. Microwave another 45 seconds longer, stir until chips are completely melted & mixture is smooth. Pour over cake mixture. With teaspoon, drop remaining 1/3 of cake mixture across top of chocolate layer. Bake at 350 degrees 20-25 minutes or until lightly browned. Cool. Cut into bars.