In a large mixing bowl, combine chopped pecans, graham cracker crumbs, brown sugar, and salt. Stir in the maple syrup, melted butter, and vanilla extract. Mix well until a thick, sticky dough forms.
Scoop out about a tablespoon of dough and roll it into a smooth ball using your hands. Place each ball on a parchment-lined baking sheet. Once all are rolled, chill in the freezer for 30 minutes to firm up.
In a microwave-safe bowl, melt chocolate chips and coconut oil (if using) in 30-second intervals, stirring between each, until smooth and fully melted.
Using a fork or dipping tool, coat each chilled ball in the melted chocolate, letting excess drip off. Return to the parchment-lined tray. Once all are coated, refrigerate or freeze until the chocolate sets—about 10–15 minutes.