The funfetti cake from Hail Mary restaurant in Brooklyn has become very popular, with many tables ordering multiple slices. The restaurant's owner, Sohla El-Waylly, has fond childhood memories of making and eating funfetti cake every day. She now bakes a three-tiered version with homemade rosewater sprinkles, salted caramel buttercream frosting, and more sugar than flour for a light texture. The detailed recipe includes instructions for making the sprinkles, caramel, and buttercream.