First, gather all your ingredients and prepare them in the right amounts. That makes it so much easier and more fun and you're less likely to forget anything.
Preheat oven according to instructions on puff pasty packaging.
Roll out puff pastry and add chocolate in 5 portions on one of the long sides.
Cut puff pastry in 5 big stripes and roll up from the chocolate end. Then put on parchment paper on baking sheet.
Mix 1 teaspoon baking soda with 1 tablespoon boiling water and brush on the pastries carefully, including the sides.