Preheat oven to 180 degrees celsius (fan-forced) and line 3 baking trays with baking paper.
Place the butter, caster sugar, brown sugar and vanilla extract into the TM bowl. Mix for 80 seconds on Speed 6 (scrape down the sides of the bowl after 40 seconds).
Add the egg and mix for a further 20 seconds on Speed 6. Scrape down the sides of the bowl, add the self raising flour and salt and mix for 40 seconds on Speed 4.
Add the rolled oats and the chocolate chips and mix on Reverse, Speed 3 for 10 seconds.
Chill the dough for 30 minutes (optional but recommended).
Roll into tablespoon sized balls and place onto the baking trays (leaving a 5-7cm gap in between to allow for spreading).
Bake for 10-12 minutes or until lightly golden.