Preparation:
Step: 1
In the bowl of the bread machine, pour the milk, melted butter, sugar and beaten egg. Add the flour and yeast. Start the dough program.

Step: 2
In a salad bowl, whisk the yolks with the sugar and cornstarch. Gradually add the warm milk and vanilla. Cook over medium heat until thickened.

Step: 3
Remove your risen dough from the machine. Roll it out into a large rectangle 5 mm thick, on a floured work surface.

Step: 4

Spread half of the rectangle with pastry cream and then spread the chocolate chips.

Step: 5
Fold the dough in two and press the edges to seal them well.

Step: 6
Cut strips 4 cm wide.

Step: 7
Place the buns on a baking sheet and brush them with egg yolk. Leave to rise for 1 hour in a warm place.

Step: 8
Bake for 12 minutes in the oven preheated to 180°C.