Creating Hot Chocolate Cookies is a simple process that yields yummy results when you follow these steps:

1. Preheat your oven: Set it to 350°F (175°C) and line a baking sheet with parchment paper.
2. Mix Dry Ingredients: In a bowl, whisk together the flour, cocoa powder, baking powder, baking soda, and salt.
3. Cream Butter and Sugars: In a large mixing bowl, beat the softened butter, granulated sugar, and brown sugar until smooth and creamy.
4. Add Eggs and Vanilla: Incorporate the eggs and vanilla extract into the butter mixture, mixing well until fully combined.
5. Combine Mixtures: Gradually add the dry ingredients into the wet mixture, stirring until just combined. Be careful not to overmix.
6. Fold in Chocolate Chips: Gently stir in the semi-sweet chocolate chips and mini marshmallows until evenly distributed.
7. Scoop Dough: Using a cookie scoop or tablespoon, drop rounded balls of dough onto the prepared baking sheet, spacing them about 2 inches apart.
8. Bake: Place in the preheated oven and bake for 10-12 minutes or until the edges are set but the centers are still soft.
9. Cool on Sheet: Take them out of the oven and cool on the baking sheet for 5-10 minutes, then transfer to wire racks to cool completely.

Following these steps will lead you to delightful Hot Chocolate Cookies that are bound to impress.