Line a small baking sheet with parchment. Pour the coating coconut into a shallow bowl.
Stir unsweetened coconut, graham crumbs, lime zest, and salt together in a mixing bowl.
Add condensed milk, lime juice, and vanilla. Mix until a thick, sticky dough forms.
Chill the bowl for 15–20 minutes until the mixture firms up for scooping.
Scoop 1-tablespoon portions and roll into smooth balls with your hands.
Roll each ball in the sweetened coconut to coat. Chill 10 minutes, then serve.