Preheat oven to 350 degrees F. Gease a 12-cup muffin pan.
Pour melted butter into a medium bowl. Add in sugars and whisk together. Add in eggs and vanilla extract and beat together with a hand mixer. Set aside.
In a medium bowl, combine flour, baking soda and salt.
Combine dry ingredients into wet and beat together till dough forms.
Fold chocolate chips into dough with spatula.
Using a medium ice cream scooper, scoop dough into muffin cups. Using the back of an ice cream scooper, press down a cavity into the center of the cookie cup. Place in fridge for 15 minutes to chill. Remove from fridge and bake for 18-20 minutes. The cookies will puff up slightly and will be golden brown. Remove from the oven, re-push down your cookie cavity, and let the cups cool on a cooling rack.
While the cookie cups cool, make whipped cream by combining heavy whipping cream, powdered sugar, and vanilla extract. Beat for 2-3 minutes till stiff peaks form. Place whipped cream in a piping bag and set aside.
Fill another piping bag with Nutella. Pipe Nutella into cooled cookie cups. Take a whipped cream piping bag and swirl on mini ghost. Decorate with candy eyes.
Enjoy!