Grease and line three baking trays (or if you have 6" USA pans you don't have to grease or line just pop the cookie dough straight on like we did)
Place butter, sugar and vanilla into the TM bowl. Cream together for 1 minute/Speed 4.
With the TM still running, add the eggs, one at a time through the hole in the lid and continue mixing on Speed 4/ 20 seconds.
With a spatula lift the butter mix from the base of the bowl and scrape down the sides then add the plain flour, baking powder, baking soda and salt and knead on Interval Speed/20 seconds.
Add the chocolate chips and stir on reverse speed + 3 / 4 seconds or leave the chips until the end and decorate the tops of the cookies just before they go into the oven as we did.
Place the Thermomix in the fridge for 15 - 30 minutes for the dough to firm up a bit making it easier to spoon out later. Even overnight is ok.
Using a Tablespoon drop spoonfuls of dough onto the cookie sheet leaving room for them to spread while baking.
This is where you pop on your chocolate chips if you didn't fold them through
Pop them in the oven and bake till golden brown. It will take between 10 and 15 minutes depending on the size you make them.
Remove from oven and set the trays on a baking rack for 5 minutes before removing the cookies with a spatula.