To a mix master bowl, food processor or Thermomix bowl place the flour and sugar mix a couple of seconds to incorporate the sugar well.
Add the cubed butter (room temperature if using the mix master and chilled if using the food processor or Thermomix)
Mix on medium speed until well combined and the butter is well incorporated, Use the pulse action on food processor and for Thermomix 10 sec/speed 6, then knead/dough function 20 seconds.
Remove from the bowl and either roll out and cut into desired shapes or form into logs, wrap in Gladwrap and chill.
Preheat oven 150 C
Cut shortbread in slices to desired thickness and place on lined oven trays, or roll out then use cookie cutters to cut into shapes.
Bake in oven for approximately 20 minutes, turning tray half way.
The shortbread is cooked when lightly coloured and the biscuit will turn on the tray when gently twisted.
Cool on trays and store in an airtight container when completely cooled.
If stored correctly they will keep for up to 4 weeks.