In a medium bowl, combine the peanut butter, maple syrup, coconut flour, and salt (if using). Mix very well, until a uniform batter is formed. Use a spoon to scoop the batter into 6 balls, and use your hands to shape the dough into flat egg-like shapes. Arrange the 6 eggs shapes on a plate lined with parchment paper, and place in the freezer to set.
While the peanut butter middles are setting in the freezer, melt the dark chocolate chips and stir in the coconut oil. Remove the the peanut butter middles from the freezer, and dunk each one into the chocolate mixture, so that they are completely coated. Return the chocolate covered pieces to the parchment paper, and spoon any additional chocolate over the tops for a thicker chocolate coating, if you like.
Allow to set in the freezer for at least 10 more minutes before serving.