Place a 10inch round cake board onto a cake stand
Place 1 layer of cake onto the cake board
Scoop about 1 C of frosting onto the cake layer
Place a layer of the pie crust onto the frosting
Pipe two large rings around the pie crust
Fill in the middle with 3/4 C of the apple filling
Place another cake layer on top
Repeat the steps with the second pie crust
Place the third layer of cake on top of the second layer of apple filling
Using the remaining frosting, frost entire cake
Use your hands to break up the crumble
Coat the bottom and the top in the crumble
Place cake in the fridge to allow the frosting to harden up
Cut into slices and enjoy!