Method

1. In a microwave-safe mixing bowl , melt the Van Houten Professional Semi Sweet Dark Compound and butter.
2. In a large mixing bowl, beat the sugars and eggs on medium speed until light and frothy.
3. Add the melted chocolate mixture and vanilla then beat until combined.
4. Add flour, cocoa powder, salt, and baking powder. Stir together with a spatula until mostly combined.
5. Stir in both chocolate chunks and mix until the batter is well combined.
6. Cover the bowl and chill the batter for 30 minutes.
7. Preheat the oven to 175°C . Line two baking sheets with parchment paper.
8. Scoop the chilled dough into 2-tablespoon-sized balls and place on the prepared pans about 3 inches apart . Press and add marshmallow .
9. Bake for 8 to 10 minutes or until the cookies have spread and are shiny and cracked. (They will still be soft when hot and firm up as they cool.) Let cool completely on the pans.