Single-serving giant chocolate chip cookie

Preheat the oven to 350°F. Place a square of parchment paper on a baking sheet. In a small bowl, mix together the butter and brown sugar until incorporated. Add the milk and vanilla and mix until combined. Add the flour, baking soda and salt and mix until just combined. Fold in desired amount of chocolate chips. Form into a ball and place on a baking sheet. Bake for 10-12 minutes, until golden.