Preheat oven to 325°F (165°C). Lightly grease cookie sheets.

In a medium bowl, stir together the dark and low-calorie chocolate cake mixes. Add the eggs and oil, and mix until well blended. Roll dough into 2-inch balls and place them onto the prepared cookie sheet. Flatten the balls slightly with the back of a spoon.

Bake for 10 to 12 minutes in the preheated oven until firm. Let cool on the baking sheet for a few minutes before transferring to wire racks to cool completely.

To make the filling, beat the cream cheese and confectioners' sugar together until smooth.