Preheat oven to 350 degrees F. Line a baking sheet with parchment paper.

Into a medium-size mixing bowl add 1/4 cup of the confectioners' sugar and softened butter. Using an electric mixer, blend until smooth.

Add all-purpose flour, quick-cooking oats, coconut, walnuts, and salt. Mix on medium speed for 25 seconds, until well combined.

Continue mixing an additional 25 seconds, until the dough comes together and turns pink in color.

Using your very clean hands, roll the dough into 15 balls. Place them 2 inches apart onto the parchment-lined baking sheet.

Bake in preheated oven for 18 minutes.

Into a small mixing bowl, add the remaining 1 cup confectioners' sugar. While cookies are still warm, roll each in the sugar to coat.

Once all of the cookies have been coated, roll each in the sugar a second time.

Store cookies in an airtight container.