In a Kitchen Aid stand mixer add all the wet ingredients: soft butter, eggs, the entire jar of Nutella and the sugar.
Mix all the ingredients well.
In a separate bowl, add the flour, the salt, the baking soda and all the chocolate morsels. Mix everything well with a spoon.
Mix the vanilla extract and the milk.
Start up the stand mixer again and alternate by adding some of the flour and chocolates and the milk. After you have added all the ingredients continue mixing until the dough is well amalgamated.
Put the dough in the freezer for about one hour.
After the refrigeration the dough will be much firmer and easier to roll into small balls.
Roll the dough into balls the size of a golf ball and place on cookie sheet about 1 1/2 inches apart.
Bake for 10-12 mins. at 375F.