Put the prepared cherries in a bowl, add the grand marnier, cover and put in the fridge. *You can do this the day before if desired!
Once the cake is cooled, cut it into 1 inch squares *You can make the cake the day before if desired
Prepare the chocolate mouse by mixing the pudding mix and milk. Stir well, add in the whipped topping. Mix well and put in fridge until ready to use. *You can make this the day before if desired
Prepare the homemade whipped cream in a stand mixer by adding the heavy whipping cream to bowl, mix on medium speed, add in sugar and vanilla. Once peaks start to form, stop.