Dry chickpeas by placing them in a clean kitchen cloth and gently rubbing to remove excess moisture and skins.
Add chickpeas, nut butter, oat flour, maple syrup, brown sugar, salt, and vanilla extract to a food processor.
Pulse on high until a smooth dough forms with no visible chickpea chunks.
If using, add vegan mini chocolate chips and pulse a few more times to evenly combine.
Refrigerate the dough for 15 minutes to firm up.
Line a tray with parchment paper and scoop dough using a cookie scoop or tablespoon.
Roll scooped dough into balls using your hands and place on the prepared tray.
Freeze the dough balls briefly to firm up more.
Melt the vegan dark chocolate either in the microwave in 15-second intervals or on the stovetop over medium-low heat, stirring until smooth.
Dip each chilled dough ball in the melted chocolate with two forks until fully coated; allow excess chocolate to drip off.
Place coated dough balls back on parchment paper and chill in the refrigerator until chocolate hardens.
Enjoy your chocolate-coated chickpea cookie dough bites!