Line a baking sheet with parchment paper.

Sift together the flour, baking soda, baking powder, cocoa powder, hot chocolate mix, and salt. Set it aside.

In a separate bowl, whisk together the cooled melted butter, granulated sugar, brown sugar, vanilla and eggs.

Add in the dry ingredients and mix until well combined, the batter will be sticky.

Mix in the chocolate chip morsels and marshmallows to combine.

Using a cookie scoop, scoop 2 Tbsp of dough and transfer to the line baking sheet. Repeat with all the dough.

Chill the cookie dough balls for at least 30 minutes.

Preheat the oven to 350°F and line another large baking sheet with parchment paper.

Using your hands, roll the dough balls into nicely shaped balls. Place the cookie dough balls onto the baking sheets, 1-2 inches apart from each other. Do NOT overcrowd the cooking on the baking sheet.

Bake at 350°F for 12 minutes or until the edges begin to turn brown.

Cool for about 5-10 minutes. Top with crushed flakey salt and serve warm or cooled.