Use an electric mixer and mix the wafers.
Place the mixed wafers in a bowl and add the Nutella and 1/3 cup (50 gr.) of coarsley chopped hazelnuts.
Mix well and place in the fridge for 30 m.
After the time has passed, wet your hands and use about 2 teaspoons of the mixture and shape into small balls. As you shape the ball, insert one whole hazelnut inside.
Place the finished product on a tray and cover with saran wrap, then keep in the freezer for 2 hours.
After the two hours have passed, melt the milk chocolate using a double boiler and add the remaining coarsely chopped hazelnuts.
Remove the balls from the freezer and roll each ball in the melted chocolate.
Place each ball on a rack to allow for the excess chocolate to drip.
Place the Ferrero Rocher in small chocolate paper liners (like muffins liners, but small ones)