- 4 (1-oz.) unsweetened chocolate baking squares
- ¾ cup butter
- 1 ½ cups granulated sugar
- ½ cup firmly packed brown sugar
- 3 large eggs
- 1 cup all-purpose flour
- 1 teaspoon vanilla extract
- ⅛ teaspoon salt
Preheat oven to 350°. Line bottom and sides of an 8-inch pan with aluminum foil, allowing 2 to 3 inches to extend over sides; lightly grease foil.
Microwave chocolate squares and butter in a large microwave-safe bowl at HIGH 1 ½ to 2 minutes or until melted and smooth, stirring at 30-second intervals. Whisk in granulated and brown sugars. Add eggs, 1 at a time, whisking just until blended after each addition. Whisk in flour, vanilla, and salt.
Pour mixture into prepared pan.
Peanut Butter Streusel Brownies: Stir together ½ cup all-purpose flour, 2 Tbsp. light brown sugar, 2 Tbsp. granulated sugar, ⅓ cup chunky peanut butter, 2 Tbsp. melted butter, and ⅛ tsp. salt until blended and crumbly. Sprinkle peanut butter mixture over batter.
Bake at 350° for 50 to 54 minutes or until a wooden pick inserted in center comes out with a few moist crumbs. Cool completely on a wire rack (about 1 hour). Lift brownies from pan, using foil sides as handles. Gently remove foil, and cut brownies into 16 squares.