Place the walnuts in a high-speed food processor and pulse until finely ground into a meal.

Add the unsweetened cocoa powder and pulse briefly to combine with the walnut meal.

Add the pitted Medjool dates through the feed tube while the processor is running until the mixture clumps together into a sticky dough.

Scoop approximately one tablespoon of the mixture and roll between palms to form a uniform 1-inch ball.

Repeat the process for the remaining dough and store the bites in an airtight container in the refrigerator for up to two weeks.