Mix butter with sugar until creamy. Mix flour with starch and pudding powder and gradually stir in. Add a little vanilla flavor if you like.
Roll out the dough about 4 mm thick and cut out hearts. If it still sticks, put the dough in the refrigerator for a few minutes.
Place the hearts on a baking sheet lined with baking paper and bake at 200 ° C for about 5-10 minutes (depending on size and thickness) so that the edges do not turn brown.
Then carefully remove from the tray with a wide knife and let cool on a wire rack.
Brush half of the cooled cookies on the underside with Nutella and place a second cookie with the underside on top.
Garnish with melted milk chocolate and sprinkle with brittle.
Keep tightly closed in tin cans. It takes a few days for them to become really crumbly.