Preheat oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper.
In a medium bowl, mix together the melted butter and sugar. Stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, and salt. Slowly add the dry ingredients to the wet ingredients and mix until combined.
Add the white chocolate chips and hazelnuts to the dough and mix until evenly distributed.
Using a tablespoon, scoop out tablespoon-sized balls of dough and place on the prepared baking sheet. Use the back of a spoon to flatten the dough balls slightly.
Bake in preheated oven for 12-15 minutes, or until lightly golden. Let cool completely before serving.
Interesting Facts
These cookies are traditionally served at Christmas time in Italy.
Hazelnuts are a traditional Italian ingredient and are often used in Italian desserts.
White chocolate chips add a creamy and sweet flavor to these cookies.