With a hand mixer, cream the butter and brown sugar. Add the vanilla and salt and mix to combine.
Add in the flour and mix until you get a crumbly texture.
Add the milk and mix. Add in 3/4 Cup of the chocolate chips and fold in with a spoon or spatula.
Take tablespoonsful of the cookie dough and roll into balls, placing them on a tray covered in wax or parchment paper. Place in the freezer for 2 hours or overnight.
Melt the remaining chocolate chips in a microwave safe container. Microwave in batches of 20 seconds and stirring with a spoon until melted.
Take out the dough balls and one at a time place into the melted chocolate. Get it coated in the chocolate and using a fork, take it out tapping the excess chocolate off on the side of the bowl. Place on to the wax or parchment paper. Continue until all the dough balls are coated.
Place back in the freezer for 15 minutes until the chocolate hardens. Transfer bon bons into an air tight container and store in the refrigerator until ready to serve.