Heat oven to 350℉/177℃.
Line 2 sheet pans with parchment paper. Set aside.
In a small bowl, whisk flour, cocoa powder, baking powder, and salt together. Set aside.
Combine chocolate and butter in a microwave safe bowl.
Heat in 15 second increments, stirring after each, until melted and smooth. Set aside.
In a large bowl, whisk eggs, both sugars, and vanilla together.
Whisk in chocolate mixture.
Stir in flour mixture.
Use a 3 Tablespoon scoop to portion onto prepared pans.
Bake for 12 minutes, or until done.