Place flours, parmesan, butter and seasonings into TM bowl and mix 6 seconds / speed 6
Add egg, olive oil and apple cider vinegar and knead 40 to 50 seconds until the mix clumps, and sticks easily together when pressed between your fingers
Place a large piece of baking paper onto your bench (I place the baking paper onto a silicon mat as it holds it in position and stops it sliding on my bench top)
Upturn the TM bowl over the baking paper and allow the dough to fall onto it
Shape the dough into a long sausage approximately 34cm long, rolling it up and down on the baking paper to get a nice round shape
Wrap the dough in the baking paper, place onto a tray for easier handling, and chill in the fridge overnight (you will have more even pieces if you allow the dough to become really cold and solid)
Next day preheat oven to 170 degrees fan forced, and line a large baking tray with baking paper
Cut the dough into 8mm thick slices and place onto the tray
Bake 15 minutes, turn tray around and bake a further 10 to 12 minutes until the biscuits are a rich golden colour (it takes exactly 27 minutes in my oven)
Remove tray from oven, cool biscuits for 10 minutes on tray before placing onto a cooling rack to cool completely
Store in a sealed container for up to two weeks