Preheat oven to 350° Grease a 9x13 baking dish with cooking spray. In a medium size bowl prepare the brownies according to the box, my box called for 1 egg, 1/3 cup of water and 1/2 cup of melted butter.
Bake for 20-25 minutes. Check with a fork or toothpick to see if the brownies are done. Let brownies cool completely all the way before starting the next step.
In a large bowl beat cream cheese and vanilla then add the powdered sugar and chocolate syrup.
In a small microwave safe bowl break apart 1 chocolate bar and add the 1/4 cup of butter, microwave for 30 seconds, stirring every 10 seconds. (It may need more time)
Pour the chocolate mixture into the cream cheese mixture and beat again.
With a rubber spoon fold in the cool whip to the mixture, do not stir or it won’t be fluffy anymore. Spread over top of cooled brownies and pop in the fridge for 25-40 minutes.
Once out the fridge spread the other container of cool whip all over the top of the French silk layer, sprinkle chocolate shavings on top. You can use a potato peeler to make shavings with the other chocolate bar.
Place back into the fridge until ready to serve!