Brownies

5 ounces semisweet or bittersweet chocolate, chopped

2 ounces unsweetened chocolate, chopped

8 tablespoons (1 stick) unsalted butter, cut into quarters

3 tablespoons cocoa powder

3 eggs

1¼ cups granulated sugar

2 teaspoons vanilla extract

½ teaspoon salt

1 cup all-purpose flour

Salted Caramel Sauce

1 cup granulated sugar

6 tablespoons unsalted butter, at room temperature

1 teaspoon fine sea salt

2/3 cup heavy cream, at room temperature