Preheat your oven to 350°F (180°C) and line a baking sheet with parchment paper.
In a mixing bowl, cream together the butter and granulated sugar until light and fluffy.
Add the vanilla extract and egg, and mix until well combined.
In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until a dough forms.
Stir in the chocolate chips and chopped pecans.
Roll the dough into small balls, about 1 inch in diameter.
Roll each ball in powdered sugar until fully coated.
Place the coated balls on the prepared baking sheet, spacing them apart.
Bake in the preheated oven for 10-12 minutes, or until the cookies are set.
Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
Enjoy!