This icing is to die for. My friends and I created it for a wedding cake, but is tastes amazing on chocolate cupckes! I find you have to play with the flavour when it comes to adding the macadamia nut butter. Start with the half cup and taste. Slowly increase until you reach the intensity you like. You could defintely change the nut butter to a different nut if you preferred. To make this recipe vegan, leave out the meringue powder.