In a medium mixing bowl, combine 0.5 cup peanut butter, protein powder, coconut flour, maple syrup, and vanilla extract.
Stir the mixture vigorously until a uniform, pliable dough forms.
Portion the dough into 12 equal pieces and roll each between palms to form a smooth sphere.
Arrange spheres on a parchment-lined baking sheet and refrigerate for 10 minutes to firm up.
Combine chocolate chips, 1 tablespoon peanut butter, and coconut oil in a microwave-safe container.
Heat the chocolate mixture in 30-second increments, stirring between each, until completely melted and homogenous.
Using a fork or dipping tool, submerge each chilled protein sphere into the melted chocolate.
Place coated truffles back onto the parchment paper and immediately garnish with a light sprinkle of sea salt.
Refrigerate for an additional 15 minutes or until the chocolate shell has completely set.