Heat treat your flour by placing it in a microwave safe bowl and heating on high for 50-60 seconds until the internal temperature reaches 166°F.
In a large bowl using a hand mixer or stand mixer, cream together the brown sugar, granulated sugar, and butter. Beat until fluffy and light in color, about 1 minute. Beat in the vanilla and salt until combined.
Beat in flour until just combined. Add milk one tablespoon at at time and beat until dough starts to come together. Stir in the miniature chocolate chips with rubber spatula.