In a large bowl, combine the flour, sugar and butter. Use your fingers to slowly incorporate all of this together, eventually forming a dough ball. This may take a few minutes, but eventually a dough ball will form once you have pressed the biscuit together! Then wrap in cling film tightly and place into the fridge for at least 1 hour.
Pre-heat your oven to 180°C/ 356°F.
Generously flour a surface before cutting your dough ball in half. Then, flour the top of one of your halved dough balls before pressing it down with your hands, ensuring it stays together. Then, roll out the dough out until a thin dough has formed. You may need to add more flour as you go, to prevent the rolling pin from sticking to the dough! Then, cut your biscuits into the desired shape. Remember to have the same amount of biscuits with the hole in as well as the normal ones. I used a piping nozzle to make the small hole.
Place your biscuits onto a large baking tray which is lined with baking paper. Bake your biscuits for 8 minutes and then remove and leave to cool. You may want to do batches of these. I used a large baking tray and made 6 whole biscuits in two batches.
Once your biscuits are completely cool, sieve your icing sugar onto one half of the top biscuit (with the hole in). Then, place your chocolate hazelnut spread into a small piping bag and pipe an equal amount onto the bottom biscuits (without the hole in). Then use a small palette knife to spread the chocolate hazelnut spread out evenly, before pressing the top biscuit (with the hole in) on top of the bottom biscuit, squishing the chocolate spread into place.
Now it's time to make a cup of tea and devour these biscuits! I hope you love them.