Break the Christmas cake or pudding into pieces and place into the Thermomix bowl. Mix for 10 seconds, Speed 8. Set aside in a separate bowl.
Place the dark chocolate (broken into pieces) into the Thermomix bowl. Melt for 4 minutes, 80 degrees, Speed 2.
Add the chopped Christmas fruit cake and the brandy (or substitute) to the bowl and mix for 20 seconds, Speed 5. Scrape down the sides of the bowl and mix for a further 15 seconds or until completely combined.
Line a large flat baking tray with baking paper.
Roll tablespoonfuls of the mixture into balls and place onto the prepared tray.
In a clean and dry Thermomix bowl, melt the white chocolate for 4 minutes, 80 degrees, Speed 2.
Use a teaspoon to drizzle a small amount of the white chocolate over the pudding balls, one at a time. Use enough white chocolate so that it covers the top and starts to drizzle down the sides of the balls.
Add two of the halved spearmint leaves on top of the white chocolate and add half a glacé cherry to the middle.
Repeat the process with the remaining Christmas pudding balls.
Chill in the fridge for 1 hour or until the chocolate has set.