Preheat your oven to 180°C and line a baking sheet with parchment paper. In a mixing bowl, combine the softened butter, cocoa powder, granulated sugar, and brown sugar. Whisk until the mixture is light and fluffy.

Add the egg to the mixture along with Dr. Oetker Vanilla Sugar and mix until well incorporated. Sift in the flour, Dr. Oetker Baking Powder, and a pinch of salt. Mix until a smooth dough forms.

Fold in the chocolate chips ensuring they are evenly distributed throughout the dough. Scoop small portions of the dough (around a tablespoon each) and place them onto the prepared baking sheet, leaving adequate space between each cookie. Use a second sheet of baking paper, if needed.

Bake in the preheated oven for 8-12 minutes, or until the edges are set and the centers are still slightly soft. Allow the cookies to cool on the baking tray for 5 minutes before transferring to a wire rack to cool completely.