Homemade Oreos

I am not sure if this has been posted or not, so if it has, so sorry!

1 box devil's food cake mix (Betty Crocker or Pillsbury brand)
3/4 cup butter
2 eggs
1 package cream cheese
1/2 cup butter
2 TBSP vanilla
2 cups powdered sugar

Mix the cake mix, 3/4 cup butter and eggs and set in fridge to chill for 15 minutes. Meanwhile, mix the cream cheese and 1/2 cup butter together and add vanilla and powdered sugar. Set aside. Roll the chilled dough into small balls and place on a greased cookie sheet and bake at 350 degrees for 7-9 minutes. When cool, frost half the cookies with the frosting and top with another cookie. Enjoy!