Killer Kustard by Vapetasia is the vape juice flavor that started it all. Killer Kustard is an award-winning dessert vape that delivers luxurious vanilla custard flavor that tastes so authentic, it is almost startling. If thoughts of rich, creamy and luscious custard dancing in your head makes your mouth water, Killer Kustard is absolutely theÂ flavor for you. Killer Kustard is an intense exploration of rich dessert flavors. Each inhale and exhale of Killer Kustard will make you feel like you just ordered the most scrumptious treat off the dessert menu.