Take a parchment paper and spoon 1 tbsp nutella blobs on it. Make 5-6 nutella balls from it. Freeze these for 1 hr.
For the cookie dough, beat butter and the sugars along with vanilla until the mixture is light and fluffy
Add the dry ingredients - flour, cocoa powder, cornflour and baking soda to the mixture.
Add in the milk and bring everything together into a non sticky dough. You can use a wooden spoon or your hands to do so.
Divide the dough into 5-6 equal portions depending on the number of nutella balls.
Take one portion and make it into a ball using your palms. Press it down a little from the centre and make a little cavity. Place the frozen nutella in the centre and close the cookie dough.
Place the stuffed cookie dough on a silicon mat or parchment sheet lined on a baking tray and refrigerate for 1 hour.
Bake the cookies for 12-15 minutes at 180 degree Celsius.
Once baked let them cool on a wire rack for at least 10 minutes.
Recipe by Bake with Shivesh at https://bakewithshivesh.com/nutella-stuffed-cookies/