Add butter & sugar into the Thermomix Bowl. Mix at speed 4/10 seconds.
Add the butterfly and mix at speed 3 for 60 seconds
Add 2 eggs, vanilla, flour and other ingredients, then mix speed 4/30 seconds
Set on the dough setting for 1min 30 seconds and tip out into a bowl. If it's looking very sloppy you will need to refrigerate it for up to 30 mins, but it should be okay immediately.
When you're ready to roll out, tip it out onto a well-floured tray. Roll out, or make balls, and proceed with your cookie making fun.
Place on a tray and bake for 8 - 15 minutes, depending on the size of the cookie.
Allow to cool a little before lifting the biscuits.
Recipe by Keeper of the Kitchen at https://www.keeperofthekitchen.com/2016/12/16/basic-butter-biscuits/