Remove pits from dates, set aside.
Chop ¼ cup walnuts, set aside.
In a food processor, place remaining 1¼ cup of walnuts. Grind until fine.
Add medjool dates and mashed sweet potato.
Blend until walnuts and dates stick together.
Add raw cacao.
Blend until incorporated.
Remove mixture from food processor.
Fold in chopped walnuts until incorporated evenly. Take a teaspoon-size amount and roll gently between palms into a ball.
Roll balls in coconut shavings.
Place on a tray.
Refrigerate until set, at least an hour.
Enjoy immediately or freeze.