Ingredients: - 1/2 cup unsalted butter - 8 ounces semisweet chocolate, chopped - 1/2 cup granulated sugar - 1/4 teaspoon salt - 4 large eggs - 1/2 cup all-purpose flour - Powdered sugar, for dusting - Fresh berries and whipped cream, for garnish (optional) Instructions: 1. Preparing the Batter:    a....