Preheat oven to 180°C and line a baking tray with parchment paper.
In a small bowl or mug, place the butter and peanut butter and microwave on medium for 10 seconds or until soft.
Add in the brown sugar and vanilla and stir until blended together.
Next, add in the flour, baking soda, salt and rolled oats and keep stirring until combined.
Lastly, stir through the choc chips until evenly distributed and then, using your hands, roll the dough into a ball.
Place the cookie dough on a baking tray and gently flatten with the palm of your hand.
Dot a few extra choc chips on top and then bake on the baking tray for 12-15 minutes, or until lightly golden around the outside.
Finish with a final sprinkle of sea salt and enjoy!