Preheat your oven to 375° degrees. Prepare your baking sheet by greasing it, using non-stick foil or parchment paper.
In a mixing bowl, cream together the softened butter, light brown sugar, and granulated sugar until smooth and creamy. Beat in the eggs, one at a time, followed by the milk and vanilla extract.
In a separate bowl, combine and mix the all-purpose flour, baking soda, baking powder, and salt. Gradually add the dry mixture into the wet mixture, blending them together thoroughly. Stir in the semi-sweet chocolate chips.If you have the time, chilling the cookie dough for about 20 minutes is recommended.
Using a tablespoon or an ice cream scooper, drop heaping tablespoons of cookie dough onto the prepared baking sheet, leaving enough space between each cookie for them to spread while baking.
Bake for approximately 11 minutes, pulling cookies out when they are slightly golden brown around the edges and are still slightly wet in the center. They will look fluffy while baking and flatten once cooled, creating a crispy outside and chewy inside.
Once the cookies are done, remove them from the oven and allow them to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Enjoy!