Pour the milk into a large bowl, add the sauce powder at one time and immediately whisk vigorously for 1 minute. Season to taste with advocaat. Spread the sauce on plates.
Cut the pistachio ice cream into slices about 1.5 cm thick. Cut out 8 small rabbits with a rabbit cutter. Refreeze the ice residue (approx. 250 ml). Press one side of the rabbits into ground pistachios.
Place two on each plate with vanilla sauce. Sprinkle chopped pistachios as "grass" between the rabbits. Quarter the cocktail cherries and place them between the chopped pistachios. Decorate with balm leaves and serve immediately.