To a bowl, add brown sugar, oil and vanilla extract. Mix well.
Then sift in, flour, baking soda and salt.
Then add chocolate chips and mix until just combined.
Chill dough for 30 minutes.
After 30 minutes, form small balls with the dough and flatten the balls (you can use a glass) until 1 cm thick, 5cm diameter, (0.4 inch thick, 2 inch diameter).Add some chocolate chips on top of each cookie dough. Place the cookie dough on a piece of parchment paper and then on the air fryer grill plate.
Air Fry at 300oF (150oC) for 10-12 minutes.
Let the cookies cool down completely on a cooling rack.