Preheat oven to 350 degrees.

In a large mixing bowl, cream butter and sugars for 4 minutes or until creamy.

Add Nutella and cream for 1 minute longer. Add eggs and mix.

Stir in cocoa powder, flour, baking soda, baking powder, and salt. Mix just until combined.

Stir in chocolate chunks.

Wrap dough in plastic wrap and chill for at least 30 minutes - 1 hour, preferably overnight.

Once the dough is chilled, roll into balls and place on baking sheet.

If you using Milky Way candy bars, place two bite-size pieces in the center of each cookie dough.Parchment paper or Silpat silicone baking sheets are helpful to keep the caramel from sticking.

If using sea salt, lightly sprinkle with a touch of salt.

Bake for 9 - 12 minute.

Let cookies set up for 10 minutes before removing from pan.