To Heat Treat the Flour:Microwave: In a small microwave safe bowl add the flour. Microwave for 1 min 15 seconds, stopping to stir at 15 minute intervals. Once the flour has reached 160° F (test with a thermometer) place the flour into a clean bowl to allow it to cool. Set aside. Oven: Preheat oven to 350°F. Spread flour on a sheet pan. Bake for 5-6 minutes, then set aside to cool.
In a medium-sized bowl use a hand mixer to cream together softened butter with light brown sugar, granulated sugar and salt. Add 2 Tbsp milk and vanilla extract beating until fully combined.
Add 1 cup of cooled flour to the wet ingredients. Mix until the flour is completely absorbed. Add more flour 1 Tbsp at a time until it forms a slightly crumbly dough. If it's too crumbly, you can add additional milk in small amounts.
Mix in chocolate chips by hand until evenly distributed.
Place into an airtight container and chill for 30-60 minutes (recommended!) or enjoy immediately.