Line a cookie sheet with parchment paper. Add almond flour, arrowroot starch, and salt to a medium bowl. Whisk ingredients to combine.
Add peanut butter, maple syrup, and vanilla to dry ingredients. Stir mixture until dough forms.
Use a tablespoon to scoop dough and roll into balls. Place balls on cookie sheet in rows. Transfer to the freezer and freeze for 20 minutes.
While peanut butter balls are chilling, melt chocolate chips and coconut oil in a small microwavable bowl for 30 second intervals. Stir after each interval until almost all chips are melted. Then stir until completely melted.
Remove peanut butter balls from freezer. Using two forks (or a toothpick) dip each ball in the melted chocolate, leaving a top circle uncovered so that the peanut butter is showing. Allow excess chocolate to drip off and transfer back to cookie sheet. Continue until all balls have been dipped.
Place cookie sheet with buckeyes in the refrigerator for at least 30 minutes or until chocolate is set.
Store buckeyes in an airtight container at room temperature or in the refrigerator.
Notes
Using two forks helps you achieve a clean dip. The excess chocolate will easily drip off and then you can use the forks to carefully set the dipped balls on the baking sheet.