Crush the digestive biscuits, either in a blender or in a freezer bag with a rolling pin.
Meanwhile, in a bain-marie, gently melt the butter, syrup and milk chocolate.
Once completely melted, add the digestive biscuits and the Maltesers and mix well.
Press the digestive mixture into a lightly greased tray with the back of a spoon. Melt the white chocolate and pour/spread on top of the biscuit base. Top with your Maltesers bunnies/reindeers or with additional Malstesers.
Leave to set in the fridge for a couple of hours or ideally overnight before cutting into individual portions.