Soften the dates if needed. If the Medjool dates are unusually dry or firm, cover them with hot water for about 10 minutes. Drain them thoroughly and pat them dry. Soft, sticky dates can be used as they are.
Process the dates. Add the pitted dates to a food processor and pulse until they break down into small, sticky pieces.
Add the remaining ingredients. Add the rolled oats, toasted pecans, pumpkin purée, maple syrup, chia seeds or ground flaxseed, pumpkin pie spice, vanilla, optional maple extract, and salt.
Process until combined. Pulse until the ingredients are finely chopped and the mixture holds together when pressed between your fingers. Stop and scrape down the sides of the food processor as needed. Keep the mixture slightly textured rather than completely smooth.
Add the chocolate. Transfer the mixture to a bowl and fold in the mini dark chocolate chips by hand.
Chill. Refrigerate the mixture for at least 30 minutes, or until firm enough to roll easily.
Shape the balls. Divide the mixture into 24 portions and roll each portion between your palms until round. If the mixture sticks slightly, lightly dampen your hands.
Chill and serve. Keep the pumpkin energy balls refrigerated until you’re ready to serve them.