Preheat the oven to 350°F (175°C).

In a mixing bowl, whisk together the flour, baking soda, and salt.

In another bowl, cream together the softened butter, brown sugar, and granulated sugar until smooth.

Beat in the egg and vanilla extract until well combined.

Gradually mix in the dry ingredients, then stir in the milk until the dough is smooth.

Fold in chocolate chips and nuts if using.

Drop rounded tablespoons of dough onto a baking sheet lined with parchment paper.

Bake in the preheated oven for 10-12 minutes or until the edges are lightly golden.

Allow cookies to cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.