The Cake

1. Pre heat your oven to 180C (350F). Take your 20cm (8 inch) baking pan and cover the bottom with parchment paper and grease the sides.
2. Mix the dry ingredients together in a small bowl. In another bowl, using a handheld or stand mixer, mix softened butter and sugar into a white and fluffy consistency. Add the egg and vanilla into the sugar mixture. Mix together sour cream and milk. 
3. Alternate between adding the dry flour mixture and the sour cream milk into the sugar mixture. I added 1/3 of the flour mixture, then 1/2 of the sour cream milk, and continue until everything is incorporated. Pour the batter into the prepared baking pan.

The Apples

1. Core and peel your apples, and slice into thin slices. Mix with cinnamon. Top your batter with the apple slices. I like to even them out and completely cover the batter. Drizzle caramel on top. 

The Cinnamon Crumb

1. Mix all the ingredients for the cinnamon crumb together using either a cookie cutter or a fork. Mix until the butter is at least pea sized in shape. Cover the apple pie cake with the cinnamon crumb.

Bake it!

1. Bake on the middle rack in the oven for around 40-45 minutes, until a toothpick in the cake comes out clean. Cool the apple pie cake in the pan before serving. Drizzle with more caramel, if desired.