Rich Cheesecake Bars

Rich Cheesecake Bars
1 pkg. (9 ounces) yellow cake mix
3 tbsp butter, softened
1 egg
Topping:
1 pkg (3 ounces) cream cheese, softened
2 cups confectioners' sugar
1 egg
In a large bowl, combine the cake mix, butter, and egg until well blended. Spread into a greased 9-inch square baking pan. In a small bowl, beat the cream cheese, confectioners' sugar and egg until smooth. Spread evenly over the batter. Bake at 350 F for 30-35 minutes or until a toothpick inserted into the center comes out clean. Cool on a wire rack. Cut into bars. Makes 2 dozen