Hibiscus has a tart flavor, high in vitamin C and lowers blood pressure. And lemon to enhance the tartness and Vitamin C in this cake making it not so guilty. The hibiscus gives the cake and icing a nice flavor and color. Additional food coloring can be added for a more vibrant color. Baking in a 13x9 pan makes in easy to bring to a party. I used Recipe #423064 to spread on the warm cake before topping with icing. You can use any berry jelly you like.