Preheat oven to 375 degrees and line cookie sheets with parchment paper.
Cream butter, 1/2 each sugar and brown sugar, and hazelnut spread.
Add in egg, salt, vanilla, and baking soda until well incorporated.
Stir in flour until well combined.
Mix in chopped hazelnuts.
Roll dough into 1 inch balls, then roll in reserved sugar to coat. Place 2 inches apart on paper lined cookie sheets.
Bake for approximately 8 to 10 minutes. Remove from oven and immediately top with chocoalte pieces. Allow to cool on cookie sheet.
Store in airtight container.