Use an electric mixer on medium speed to cream together butter and brown sugar.
1 cup butter, 1 cup brown sugar
Add vanilla extract and egg and continue to mix until combined.
2 large egg, 1 tsp vanilla extract
In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
2 ¼ cup flour, 1 tsp baking powder, ½ tsp salt
Add the sifted hot cocoa mix (remember to reserve the marshmallows for the top) and the cocoa powder to the dough. Mix on medium-low until combined.
¾ cup hot chocolate mix, ¼ cup cocoa powder
Add half of the flour mixture and continue to mix on medium-low until combined. Slowly add in the rest of the flour mixture. Do not over-mix!
Stir in the chocolate chips.
1 cup chocolate chips
Prepare 2 cookie sheets with parchment paper. Or bake one batch at a time.
Using a medium cookie scoop or heaping tablespoons, drop cookie dough onto baking sheets 1" apart. 15 cookies per sheet.
Place 5 of the reserved marshmallows from the cocoa mix onto the tops of the cookie dough drops. Also place extra chips if you wish.
Bake for 10-11 minutes until the edges are lightly golden. Allow to cool on the cookie sheet for 5 minutes and then transfer to a cooling rack to fully cool.
The cookies are also delicious while warm and gooey!
Optional topping: For some festive flare, melt 1/4 cup semi-sweet chocolate chips in a microwave-safe bowl in 15-second intervals. Pour melted chocolate into a ziploc bag and snip a corner. Drizzle the chocolate onto the cookies and then top with holiday sprinkles.