Grease the bottom and sides of a 22cm springform pan. Line the base with baking paper.
Preheat oven to 160 degrees celsius (fan-forced).
Cream butter, sugar, cinnamon and vanilla extract together for 30 seconds, Speed 4. Scrape down the sides of the bowl.
Add the eggs and milk and beat for a further 20 seconds, Speed 3.
Add the self-raising flour and combine for 20 seconds, Speed 4.
Pour the mixture into the prepared tin.
Cut the peeled apples into 4 sections and make deep slits in each section. Place the apples (round side facing up) onto the cake batter and press down lightly.
Sprinkle over the ground cinnamon and the raw sugar.
Bake in the oven for 40-45 minutes or until the cake is cooked when tested with a skewer.
Leave to cool in the baking pan for 20 minutes before placing onto a wire rack to cool completely.