In a bowl, combine the dry cake mix, eggs and oil. With floured hands, press 2/3 of the mixture into a greased 13x9x2-inch baking pan. Set remaining cake mixture aside. In a microwave-safe bowl, combine the milk, chocolate chips and butter.

Microwave, uncovered, on high for 45 seconds; stir. Microwave 45-60 seconds longer or until chips and butter are melted; stir until smooth. Pour over crust. Drop teaspoonfuls of remaining cake mixture over top. Bake at 350 degrees for 20-25 minutes or until lightly browned. Cool before cutting.

Yield: 3 dozen bars