Peel apples, cut out the core. Cut apples into slices of about 1 cm thickness and place them in a greased mould (approx. 1.2 litres capacity). Sprinkle pecan nuts over it.
Mix flour, cocoa and sugar. Press a depression in the middle, add eggs and about 1/3 of the milk. Mix everything slowly with a whisk. Add the rest of the milk and mix. Melt butter and stir slowly.
Pour the dough into the form and bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 35 minutes.
Chopping chocolate. Take the pudding out of the oven, sprinkle with the chocolate and let it cool down for about 20 minutes.