Chop the caramel bars into small pieces. Peel and quarter apples and remove the core. Cut the quarter into cubes and mix with 1 tbsp. sugar and cinnamon.
Cream fat, 200 g sugar and salt with the whisk of the hand mixer. Stir in the eggs one after the other. Mix flour, baking powder and cardamom and stir into the fat-egg mixture alternately with the milk.
Stir in apples and caramel bars.
Pour the dough into a greased, flour-dusted ring cake tin and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 1 hour. Remove and let cool on a cake rack.
Carefully turn out of the tin onto a cake plate and let it cool down. Dust with icing sugar.