Wash, peel and quarter apples. Cut out the core. Cut the flesh into small pieces and sprinkle with lemon juice. Mix flour and baking powder, sieve into a mixing bowl. Add salt, sugar, cinnamon, vanillin sugar, eggs, oil and buttermilk and work into a smooth dough with the dough hooks of the hand mixer.
Carefully fold in apple pieces and chocolate drops. Put 2-3 paper baking cups into each other and fill up to 3/4 with dough. Bake in the preheated oven (electric cooker: 200°C/ gas: level 3) for 25-30 minutes until golden brown. Serve dusted with cocoa and icing sugar. Results in approx. 20 pieces