Using the Simply Magic Cake Mix as a base:
Add the zest of an orange to the cake mix.
Instead of 2/3 cup of milk or milk substitute, use 1/3 cup of Grand Marnier and 1/3 cup of milk or milk substitute. For a very intense cake, use 2/3 cup of Grand Marnier instead of the milk.
Add 2 tsp of orange extract.
This would also be very good if you added a heavy handful of chocolate chips.