Preheat the Oven: Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper.
Mix Dry Ingredients: Whisk together flour, cocoa powder, baking soda, and salt in a bowl. Set aside.
Cream Butter and Sugar: Beat butter and sugar together until smooth and creamy. Add egg and vanilla, mixing until combined.
Add the Dry Ingredients: Gradually mix in the dry ingredients, ensuring everything is combined well.
Stir in the Chocolate: Fold in both the semi-sweet and dark chocolate chips.
Form Dough Balls: Scoop tablespoon-sized portions of dough and roll into balls.
Espresso Sprinkles: In a small bowl, combine espresso powder and sugar. Sprinkle this mixture over the dough balls.
Bake: Place dough balls on baking sheets and bake for 10 minutes. The cookies should be soft in the center but firm at the edges.
Cool and Serve: Let the cookies cool for a few minutes before transferring them to a cooling rack.