Preheat an oven to 350F and spray a baking sheet with nonstick cooking spray or line it with parchment paper. Set aside.
Mix the dry ingredients in a large mixing bowl and stir until everything is evenly mixed. Be sure to get any clumps of flour or Swerve out before adding the liquid ingredients.
Add the butter and 2 tablespoons (30g) of apple sauce and stir well.
Continue stirring the mixture until a dough begins to form. Add the remaining apple sauce slowly, as needed, to hydrate the dough and incorporate any remaining dry ingredients. (Different protein powders may require slightly different amounts of apple sauce to hydrate.)
Break the dough into 10 pieces. You can weigh the entire ball of dough and divide that by 10 to know how much each piece should weigh.
Roll the pieces between your palms to smooth. The dough should be easy to work with but if it's on the stickier side, you can spray your hands with cooking spray to prevent sticking.
Bake for 10-12 minutes or until the bottoms begin to brown slightly. Since there are no food safety concerns like eggs, I like to slightly undercook them (8-10 minutes) so they're gooey inside. Every oven is different but 12 minutes should cook them through.
Add the extra Swerve to a shallow bowl or plate and roll the baked protein balls in the sugar after they've briefly cooled.