Preheat oven to 375°F (190C, 463K)

Mix the dry team in a mixing bowl and whisk together to aerate then. Alternatively, sift them through a colander for a more even consistency.

Place the butter, brown sugar and granulated sugar in a large mixing bowl and cream with an electric mixer.

Separate one of the eggs, keeping the yolk.

Mix the yolk, along with the other egg, vanilla extract and milk into the creamed sugar and butter. Beat together until smooth.

Add the dry mix into the bowl with the wet mix, and combine thoroughly with a large spoon. If the results become too dry, add more milk as needed.

Add chocolate chips as desired and continue mixing.

Place balls of dough about 2" apart on as many greased baking sheets as are needed.

Bake at 375°F until golden brown, about 9 to 12 minutes.

Remove and let cool for at least 5 minutes before removing from baking sheet.