INSTRUCTIONS
1. Preheat oven to 350 ºF.
2. In a double boiler, melt 1/3 cup dark chocolate and butter for 10 minutes.*
3. Stir 11/2 cups sugar, flour, eggs, and 1 teaspoon salt in a separate bowl, then mix in the melted chocolate mixture.
4. Fold in remaining ½ cup dark chocolate and semisweet chocolate. Pour the batter into a greased cast iron skillet and bake for 40-45 minutes.
5. While the brownies bake, make the whipped cream: Whisk heavy cream, remaining 2 tablespoons of sugar, and remaining ¼ teaspoon of salt to medium peak consistency.