1-First Step: Preparation and Mise en Place Start by gathering all your ingredients. It is crucial to have the butter softened to room temperature to ensure it creams properly with the sugar. Preheat your oven to 350°F and line a baking sheet with parchment paper. This prevents sticking and makes cleanup easy. Measure out your hot cocoa mix, marshmallows, and sprinkles into small bowls so they are ready when you start filling the cookies. Being organized makes the process smoother and more enjoyable.

2-Second Step: Mixing the Dough In a large mixing bowl, cream together the softened butter and sugar until the mixture is light and fluffy. This usually takes about 2 to 3 minutes with an electric mixer. Add the egg and beat until fully incorporated. In a separate bowl, whisk together the flour, cocoa powder, and baking soda. Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined. Finally, fold in the chocolate chips. Do not overmix, as this can make the cookies tough. The dough should be thick and pliable.

3-Third Step: Chilling the Dough Chill the dough in the refrigerator for 30 minutes. This step is important because it solidifies the fat, preventing the cookies from spreading too much in the oven. If the dough becomes too hard to scoop, let it sit on the counter for a few minutes before proceeding. This resting period allows the flour to hydrate fully, resulting in a better texture.

4-Fourth Step: Shaping and Filling Scoop tablespoon-sized balls of dough. Take one ball and use your thumb to press a deep indentation into the center. Place 1 teaspoon of hot cocoa mix into the well, followed by a small pinch of mini marshmallows and a few sprinkles. Take another scoop of dough, flatten it slightly, and place it over the filled dough ball. Pinch the edges together to seal the filling inside completely. Roll the sealed ball gently between your palms to make it round again. Ensuring a tight seal prevents the filling from leaking out during baking.

5-Fifth Step: Baking to Perfection Place the sealed dough balls onto the prepared baking sheet, leaving about 2 inches of space between them. Bake at 350°F for 10 to 12 minutes. The edges should look set and slightly golden, but the centers might still look a little soft. This is normal as they will continue to cook on the hot pan. Keep an eye on them to avoid overbaking, which can dry out the cookie.

6-Final Step: Finishing Touches Remove the cookies from the oven and let them cool on the baking sheet for 5 minutes before transferring them to a wire rack. Cooling them completely is essential before storing or serving to ensure the centers set properly. For an extra festive look, you can drizzle melted white chocolate over the tops once they are cool. This adds a professional touch and extra flavor.