Roast the hazelnut in the oven at 340°F (170°C) over a baking tray until they turn golden. Wait them to cool down before chopping them in the food processor.
Place all the ingredients, except the chocolate in a food processor or stand mixer. Mix them all together until a dough forms.
Cover the dough in plastic wrap and refrigerate it for at least 2 hours.
After 2 hours, take out the dough from the refrigerator and start making small balls, 6-7 grams each, or 3/4 inch diameter.
Place them on a baking tray cover with parchment paper, at 1.5 inch distance each.
Place the tray in the freezer, for at least 1 hour.
Remove the baking tray, and cook directly the small ball from frozen.
Bake them for 15 minutes at 340°F (170°C), then 5 minutes at 300°(150°C).
Let them cool down, before placing them on a baking grid.
In the meantime, melt the chocolate in the microwave, at interval of 20 seconds until fully melted.
Once the chocolate is creamy, with a small spoon, add a bit at the center of each cookie, and place on top the other half. You have your Bacio!
COntinue until you paired all the cookies.