Add fruit cake to a large bowl, and crumble into crumbs with your hands.
700 g fruit cake
Add rum and mix well to combine.
¼ cup dark rum
Melt dark chocolate in the microwave on 50% power in 30-second bursts, mixing between each burst using a metal spoon.
225 g dark chocolate melts
Pour the chocolate into the cake mixture, then mix well to combine.
Roll tablespoonfuls of the mixture into balls, then set aside.
Use a sharp knife to slice the green mini M&Ms in half.
Then melt white chocolate in the microwave on 50% power in 30-second bursts, mixing between each burst using a metal spoon.
110 g white chocolate melts
Using a teaspoon, drizzle a small amount of white chocolate over three balls, then top each with a red mini M&M, and two halves of a green M&M to look like holly.
red and green mini M&Ms
Repeat with remaining balls.
Place in the fridge to set.