In bowl of food processor, combine toasted pecans, dried cherries, dates, oats, cacao powder and vanilla extract. Pulse until ingredients begin to bind and form loose, dough-like ball.
Roll into 1-inch balls. Roll balls in additional cacao powder, if desired, and transfer to airtight container. Refrigerate until ready to serve, up to seven days.
Note: To make gluten-free, substitute 1/4 cup of certified gluten-free old-fashioned oats.