I have black walnuts given to me sometimes and I never know what to do with them because I have always found them to be almost impossible to open. I have looked for methods before and the best I was ever able to find was old time advice about putting the nuts in gunny sacks and repeatedly running them over with my car. Then I stumbled across Hickery holler farm and what do I see. An actual nut cracker designed for hard nuts. Ha, I will know exactly what to do with any gifts of black walnuts from now on.
I am really glad too because I absolutely love black walnut ice cream and black walnut fudge and at around $16.00 per pound it would be money saved if I just cracked some myself. Hickery holler farms tells how to process walnuts from tree to freezer.
How to Harvest Walnuts
http://hickeryhollerfarm.blogspot.com/search/label/Foraging%20and%20Wild%20Edibles