Creating these Hot Chocolate Cookies is straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper.
2. Cream Butter and Sugars: In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
3. Add Eggs and Vanilla: Beat in the eggs one at a time, then stir in the vanilla extract until well combined.
4. Mix Dry Ingredients: In another bowl, whisk together the flour, cocoa powder, baking soda, and salt.
5. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix.
6. Fold in Chocolate Chips: Gently fold in the semi-sweet chocolate chips and mini marshmallows if using.
7. Scoop the Dough: Using a cookie scoop or tablespoon, drop the cookie dough onto the prepared baking sheets, spacing them about 2 inches apart.
8. Bake: Place the baking sheets in the preheated oven and bake for 10-12 minutes, or until the edges are set but the centers are still soft.
9. Cool: Remove from the oven and let the cookies cool on the baking sheets for 5-10 minutes before transferring them to wire racks to cool completely.
10. Dust with Powdered Sugar: For an extra touch, dust the cooled cookies with powdered sugar before serving.

By following these steps, you’ll create Hot Chocolate Cookies that are not only delicious but also visually appealing!