We have a lot that has black walnut trees. The nuts have a hearty earthy flavor. I've made several pies. I was have soup and a beer at a local pub and started talking to a gentleman about his t shirt. It actually looked like he was working on his car and got oil all over his shirt. He then explain to be he just wrapped up black walnut hulls and left it outside. I was intrigued and started me research on Black Walnuts. That is how we got started with our black walnut shirts!