In a large bowl, whisk together flour, cocoa powder, sugar, baking powder, baking soda, and salt.
In a separate bowl, whisk together buttermilk, egg, and melted butter. Pour into the dry ingredients and stir until just combined.
Heat a large skillet over medium heat. Coat with cooking spray and pour ¼ cup of batter into the pan. Cook until bubbles have formed and the edges have set. Place cooked pancakes on a baking sheet in the oven to keep warm.
Melt Novamex Hot Chocolate Drink Tabletsand heavy cream in the microwave for 1 minute and whisk until smooth.
Stack pancakes on a plate and top with mini marshmallows and drizzle with the warm chocolate sauce.