Heat-treat the flour: Spread flour on a baking sheet and bake at 350°F (175°C) for 5-7 minutes until it reaches 165°F. Allow to cool completely before using.

Cream the butter and sugars: In a medium bowl, beat the softened butter, brown sugar, and granulated sugar until light and fluffy, about 2-3 minutes.

Add wet ingredients: Mix in the milk and vanilla extract until well combined and smooth.

Incorporate dry ingredients: Stir in the cooled, heat-treated flour and salt until just combined.

Fold in mix-ins: Gently fold in chocolate chips and any other desired mix-ins until evenly distributed throughout the dough.

Enjoy immediately: Serve in small bowls with spoons, or roll into bite-sized balls for a more portion-controlled treat.