Line an 8 cup capacity pudding tin with cling wrap - making sure you leave plenty hanging over the sides.
Place the tubs of ice-cream on your bench to let them soften.
In the meantime, roughly chop ONE pack of Tim Tams and approximately ¾ of the Maltesers into large chunks, set aside until needed.
Place the softened ice-cream into the bowl of an electric mixer and mix on a low speed to combine. Add the chopped up Tim Tams and Maltesers and continue to mix until combined.
Pour the mixture into your prepared tin and place into the freezer for 6 hours (or preferably overnight) to set.
When ready to decorate/serve, roughly chop 4 Tim Tams into pieces.
Gently turn the ice-cream cake out onto a serving plate and decorate with Ice Magic, the Tim Tam pieces and remaining Maltesers. Serve immediately or place back into the freezer until ready to serve.