Place the confectioner's sugar in a medium-sized bowl & set aside.
Preheat oven to 350 degrees.
Line a baking sheet with parchment paper & set aside.
In a large mixing bowl, combine cookie mix, flour, melted butter & egg. Stir until a soft dough forms.
Fold in pecans.
Scoop dough & roll into 1" balls, pressing firmly to compact the dough.
Place 1" apart on the prepared cookie sheet.
Bake 10-12 minutes - until set BUT NOT YET BROWN
Cool 2 minutes on the baking sheet before rolling in the bowl of confectioner's sugar to coat the cookies.
Place on a wire rack to continue cooling to room temperature before storing in an airtight container.