- 1 1/2 pounds good-quality bittersweet chocolate, chopped
- 1 cup plus 2 tablespoons (2 1/4 sticks) unsalted butter
- 6 large eggs
- 3/4 cup granulated sugar
- 1 cup plus 2 tablespoons (packed) dark brown sugar
- 1 1/2 teaspoons vanilla extract
- 1 1/2 cups all-purpose flour
- 1/4 teaspoon baking soda
- 1/2 teaspoon cinnamon
- Nonstick cooking spray or 1 tablespoon unsalted butter, to grease the pan
Preheat the oven to 350 degrees F.
In a medium saucepan over medium-low heat, melt the chocolate with the butter, stirring occasionally. Set aside.
In a large bowl, whisk together the eggs and both sugars. Stir in the melted chocolate and butter. Stir in the vanilla.
In a separate bowl, combine the flour, baking soda, and cinnamon. Stir the flour mixture into the chocolate mixture until well combined.
Grease a 13 by 9-inch pan with nonstick cooking spray or the tablespoon of butter. Pour the batter into the pan and bake for 30 to 40 minutes, until a toothpick comes out clean. Let the brownies cool to room temperature before cutting into 3-inch squares.