In the bowl of a mixer or in a large bowl with a hand mixer, cream butter and sugar on medium speed until light and fluffy, 3-4 minutes.
Add vanilla and salt and blend until combined.
With mixer on low, slowly add flour to bowl until well combined.
Keep mixer on low and add 5 Tbsp. milk in until dough comes together. If dough isn't moist enough, add additional Tbsp milk.
Mix in mini chocolate chips until just combined.