Preheat oven to 350 degrees
Grease and flour a 9x13 baking dish.
In the mixing bowl of a stand mixer, add the cake mixes, spices, oil, eggs, vanilla and buttermilk.
Start the mixer on low speed, increasing to medium speed,
Mix for five minutes.
Fold in the diced apples and pour into the prepared cake pan.
Pour the batter into your baking dish.
Bake 35 to 40 minutes.
Insert a toothpick in the center of the cake if it comes out clean it is fully baked.
Place the cake to the side to cool.
Prepare the frosting as directed.
Spread the frosting on the top of the cake evenly.
Garnish with mixed nuts