
1 cup granulated sugar
3/4 cup light brown sugar, packed
2 large eggs
2 teaspoons vanilla extract
2 cups all-purpose flour
3/4 cup unsweetened cocoa powder
1 teaspoon baking soda
1/2 teaspoon baking powder
1/2 teaspoon salt
1 cup semi-sweet chocolate chips
1 cup chocolate chunks
1 cup mini marshmallows (optional)