Preheat your oven to 350°F (175°C).
In a mixing bowl, cream together softened butter, light brown sugar, and granulated sugar until light and fluffy, about 2-3 minutes.
Add the egg and vanilla extract, beating until well combined.
In a separate bowl, whisk together flour, salt, and baking soda.
Gradually mix the dry ingredients into the wet mixture until just combined.
Fold in the semi-sweet chocolate chips.
Portion out the dough onto a prepared baking sheet, leaving space between each cookie.
Bake for 10-12 minutes until edges are golden and centers remain soft.
Allow to cool on the baking sheet for a few minutes before transferring to a wire rack.