Cover a large plate or baking sheet with greaseproof paper and roughly spoon on 12 heaped tsp of Nutella.

Put them in the freezer for at least 30 minutes, but an hour if possible.

Grease and line 2 baking sheets with baking paper.

In a large mixing bowl cream together the sugars, and butter for 3 minutes until well mixed.

Whisk the egg, vanilla, and syrup together in a small bowl.

Add the egg mix to the butter and sugar and mix for 2-3 minutes until even.

Stir through the chocolate chips.

Sift in the flour, cocoa, and bicarbonate of soda.

Mix into a sticky dough, cover, and place in the fridge for 1 hour.

Preheat the oven to 180 degrees (fan assisted).

Remove the dough from the fridge.

Roll into 12 even balls and place on baking trays with plenty of space (I put 6 on a sheet).

Press down into rounds about 3mm thick.

Remove the Nutella from the freezer.

Place one dollop of Nutella in the middle of each round of cookie dough.

Carefully fold the dough over the Nutella, and use your fingers to shape it back into neat rounds.

Bake in the oven for 10-12 minutes.

Remove from the oven and cool on a wire rack.