Red Velvet is not traditional here in Spain either, well, neither are sponge cakes that are 4" tall, but RV is my bestseller. People ask what it tastes of, and I explain that it's a bit of chocolate, and bit of vanilla, and tastes like neither. When asked why it's red, I sheepishly explain that it's food colouring. After all that, they STILL buy it either in cupcake form or wedding cake form, saying that if it's my bestseller it must be good...blind leading the blind??!
I might start saying that Vanilla Bean is my best seller - it would be easier!!