Grease a 9 x 13 pan and put it aside—Preheat oven to 350 degrees.
Using two eggs and removing three tbs of water, make the cake mix according to the instructions on the package. Start adding crème de menthe along with the addition of water. Put a few drops of green food color if you like a greener cake.
Scrap the mixture into the pan and smooth the top after preparing the mixture. Place it in the oven and bake it for almost 30-40 minutes.
When a toothpick inserted in the cake will come out clean, the cake is done. Cool the cake for 10-15 minutes.
Spread fudge sauce on the top carefully after the cake is cool.
Whip the cream to the soft peaks. Take another large bowl, whip crème de menthe, cream cheese, and powdered sugar until smooth and lightened. Stir in the whipped cream and add to the firm peaks.
Before serving, chill for almost 4 hours.