Preheat your oven to 375°F and line two baking sheets with parchment paper. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until it looks fluffy and pale, about 2-3 minutes of mixing. This is where the magic starts—you're incorporating air into the dough that makes cookies rise beautifully.

Beat in the eggs one at a time, then add the vanilla flavor and stir until everything's combined smoothly. Don't panic if the mixture looks a little separated at first—keep mixing and it'll come together. The eggs add moisture and help bind everything, which is why they're so important for that chewy texture.

In a separate bowl, whisk together the flour, baking soda, and salt so the leavening agent spreads evenly throughout. Pour the dry ingredients into the wet mixture and stir gently until you don't see any white flour streaks left in the dough.

Pour in the milk and fold it in carefully until it's fully mixed into the dough. The milk sounds weird, but trust me—it's the secret to keeping these cookies soft for days. Stir in the chocolate chips until they're distributed throughout.

Scoop the dough onto your prepared baking sheets using a cookie scoop or tablespoon, spacing them about 2 inches apart. The dough will spread during baking, so don't crowd the pan or they'll merge together into one giant cookie (which happened to me once, and honestly, it was kinda delicious).

Bake for 12 minutes exactly—no more, no less—until the edges are golden brown but the centers still look slightly underdone. This is crucial because the cookies continue cooking on the hot pan after you pull them out, and that's what keeps them chewy inside.

Let the cookies sit on the baking sheet for 5 minutes, then transfer them to a cooling rack. They'll firm up as they cool completely, and that's when you'll get the perfect contrast of crispy edges and soft centers.