Better than puff pastry! A brilliantly simple technique from a VERY OLD BOOK.

250 milliliters of warm milk. 60 grams of sugar. 15 grams of fresh yeast. Mix well. 80 grams melted butter. 1 egg. 4 grams of salt. Mix well. 500 grams of wheat flour. Mix well with a spatula. Add the remaining flour. Knead the dough by hand. Cover and let rise for an hour. 400 milliliters of milk. 80 grams of sugar. 7 grams of vanilla sugar. 1 egg yolk. 40 grams of cornstarch. Mix well. Boil for 5 minutes. Roll out the dough with a rolling pin. Add vanilla cream. Sprinkle 100 grams of chocolate chips on top. Cut the dough into 12 equal pieces. Place on a tray lined with baking paper. Cover and leave for 20 minutes. Mix an egg yolk with a tablespoon of milk. Bake at 180 degrees Celsius for 25 minutes. Sprinkle with powdered sugar on top.