1 package lemon cake mix
1 egg
1/2 cup oil
1 package (8 ounces) cream cheese
1/3 cup sugar
1 tablespoon lemon juice

In a medium bowl, mix the cake mix, egg and oil together. Reserve 1 cup of this cake mixture. Put the remaining cake mixture into a 9 x 13-inch baking pan. Bake in a 350 degree oven for 15 minutes. While this is baking, mix the cream cheese, sugar, and lemon juice. Mix well. Spread this mixture over the baked cake mixture. Take the 1 cup of reserved cake mixture and sprinkle over the top. Bake for 15 additional minutes. Allow it to cool and cut into bars. Refrigerate any leftovers.