In a large bowl, using a hand mixer, beat the butter, brown sugar, granulated sugar and vanilla extract together until whipped, about 3 to 4 minutes.
1 cup unsalted butter, 1¼ cups brown sugar, ¼ cup granulated sugar, 1 teaspoon pure vanilla extract
How To Heat Treat Flour: Place 2 cups of all-purpose flour in a large microwave-safe bowl and cook on high in the microwave for 2 minutes. Remove from the microwave, stir, and check the temperature. The temperature of the flour should be higher than 175°F. If not, place it back in the microwave for another minute on high heat, then check again. The heat-treated flour will be a bit chunky and stuck together. Start by stirring it well, then pour all flour into a strainer and sift into a new bowl. Use a spoon to push any chunks of flour through the strainer. There will be a few hardened pieces (looks like rice) left in the strainer when done. Just throw those little pieces out.
2 cups heat-treated all-purpose flour
Add the flour, salt, and milk to the butter mixture and beat just until mixed.
¼ teaspoon kosher salt, ¼ cup milk
Fold in the chocolate chips, mixing well.
1 cup semisweet chocolate chips
(Optional) Roll cookie dough into equally-sized balls for a grab-and-go snack.