01 - Preheat oven to 350°F. Evenly spread all-purpose flour on a baking sheet and bake for 5 minutes to eliminate potential bacteria. Cool completely before use.
02 - In a large mixing bowl, combine softened unsalted butter, packed light brown sugar, and granulated sugar. Using a hand mixer or stand mixer, beat on medium speed until mixture is pale and fluffy.
03 - Add milk and vanilla extract to the creamed mixture. Mix until thoroughly blended.
04 - Add cooled, heat-treated flour and salt to the wet mixture. Mix just until flour is fully incorporated, avoiding overmixing.
05 - Gently fold semisweet chocolate chips into the dough with a rubber spatula.
06 - Serve immediately, or transfer to an airtight container. Refrigerate for up to 5 days if desired.