Combine dry ingredients: In a bowl, whisk together the flour, baking powder, and salt. Set aside.
Cream wet ingredients: In a separate bowl, cream together the melted butter, light brown sugar, and granulated sugar using a wooden spoon.
Combine wet and dry: Beat in the eggs until the mixture is smooth. Gradually stir in the dry ingredients and chopped chocolate.
Chill the dough: Cover the bowl and refrigerate for at least 1 hour.
Prepare the baking sheets: Position a rack in the center of your oven and preheat to 375°F (190°C). Line two or three baking sheets with parchment paper.
Scoop the dough: Using a cookie scoop or spoon, drop rounded tablespoons of dough onto the prepared baking sheets, spacing them about 2 inches apart to allow room for spreading.
Bake until set: Bake for 8-9 minutes, or until the edges are set but the centers are still slightly soft.
Cool completely: Let the cookies cool completely on the baking sheets before transferring them to a wire rack.