This vanilla cake filling tastes like the vanilla mousse that is inside a Costco cake. It is creamy, smooth, and rich. It a sturdy filling that will not deflate as some mousse fillings can. You can even use this in a cake that you want to carve.
Beat cream cheese until smooth. Add powdered sugar and beat on low until incorporated then turn the speed up and beat until smooth.
Slowly add 2 cups cream and whip on slow until it is well incorporated and smooth.
Slowly pour in the powdered instant pudding mix. Increase the speed and whip for 2 to 3 minutes until it is thick. If the filling gets too thick, slowly beat in ¼ to ½ cup more cream until you get the consistency you like.