Place raw walnuts in a food processor equipped with an S-blade and pulse until finely ground into a meal texture.
Add the cocoa powder and sea salt to the processor and pulse 3 times to incorporate.
Add the pitted Medjool dates and vanilla extract to the mixture.
Process on high speed until the ingredients form a cohesive, sticky dough that pulls away from the sides of the bowl.
Test the consistency by pressing a small amount between fingers; if too crumbly, add water 1 teaspoon at a time and pulse until it adheres.
Portion the dough into 1-tablespoon increments and roll between palms to form spherical bites.
Place bites on a parchment-lined tray and refrigerate for 30 minutes to firm before serving.