Line an 18 X 28cm slice tin with baking paper.
Place the rum and raisins into a microwave-safe bowl and heat in 30 second bursts (2-3 bursts). Set aside for 30 minutes to allow the flavour to enhance.
Place the milk chocolate into the Thermomix bowl and mix for 10 seconds, Speed 9. Set aside in a bowl.
Place the raw sugar into the Thermomix bowl and mill for 10 seconds, Speed 9.
Add the sweetened condensed milk and butter. Cook for 8 minutes, 100 degrees, Speed 3.
Cook for a further 20 minutes, Varoma temperature, Speed 3.
Add the grated chocolate and mix for 15 seconds, Speed 3.
Add the almonds and rum/raising mixture and mix for 15 seconds, REVERSE, Speed 3.
Pour the fudge into the prepared baking tin. Refrigerate until set.