Line an 18X30cm rectangular slice tin with baking paper.
Place dark chocolate melts into the Thermomix bowl and mill on Speed 9, 10 seconds. Set aside in a separate bowl.
Add the raw sugar to the Thermomix bowl and mill on Speed 9, 10 seconds.
Add the sweetened condensed milk, butter, liquid glucose and peppermint extract to the Thermomix bowl.
Cook for 8 minutes, 100 degrees, Speed 3 (MC off). Scrape down the sides of the bowl.
Cook for a further 20 minutes, Varoma temperature, Speed 3 (MC off). Scrape down the sides of the bowl.
Add milled chocolate and mix for 30 seconds, Speed 3. In the last 10 seconds, add the chopped Peppermint Crisp bars while the blades are turning.
Working quickly, spread the fudge into the prepared tray and pop into the fridge to set.