Grease a 22 cm springform cake tin with butter and line the bottom with baking paper. Mix the cinnamon with 75 g of sugar. Peel the apples, remove the core and cut them into wedges. Using a food processor, mix the cubed butter, remaining sugar and vanilla essence or extract to a light creamy consistency. Gradually add the eggs and beat each one thoroughly. Sift the flour, mix in the baking powder, pour into the butter mixture and beat on low speed until the dough comes together. Spread half of the dough on the bottom of the prepared form, cover with half of the sliced apples and sprinkle with half of the cinnamon sugar. Repeat with the remaining dough, apples and cinnamon sugar. Bake in a preheated combi oven on the indicated program. Take out the finished cake and let it stand in the mold for 10 minutes, then transfer it to a wire rack.