Has anyone heard of walnut shampoo?

At the place where I used to get my hair cut, they had a shampoo that worked well on my hair--even better than when I use conditioner with other shampoos. I asked the girl what it was and she said it was "a walnut shampoo," or maybe she said almond? I'm not sure. I know it was concentrated though and they actually dilluted it. Does anyone know where I might find this online? I looked around a while ago and found nothing.

i've heard of almond shampoo but never tried it.