The best brownies are fudgy, chewy, and dense, with the thinnest sugar crust on top. Achieving all this in a light recipe can be tricky: If you use too little fat or too much flour, or leave the brownies just a minute too long in the oven, results will range from springy cakes to dry pucks. These recipes, though, yield decadent success, from full-throttle chocolate with meaty walnuts to salty-sweet caramel-drenched bars and even a bonus blondie (or two).
Classic Fudge-Walnut Brownies- Ingredients:
3 19/50 ounces all-purpose flour (about 3/4 cup)
1 cup granulated sugar
3/4 cup unsweetened cocoa
1/2 cup packed brown sugar
1/2 teaspoon baking powder
1/4 teaspoon salt
1 cup bittersweet chocolate chunks, divided
1/3 cup fat-free milk
6 tablespoons butter, melted
1 teaspoon vanilla extract
2 large eggs, lightly beaten
1/2 cup chopped walnuts, divided
Preparation:  Preheat oven to 350°.
 Weigh or lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 5 ingredients (through salt) in a large bowl. Combine 1/2 cup chocolate and milk in a microwave-safe bowl; microwave at HIGH 1 minute, stirring after 30 seconds. Stir in butter, vanilla, and eggs. Add milk mixture, 1/2 cup chocolate, and 1/4 cup nuts to flour mixture; stir to combine.
 Pour the batter into a 9-inch square metal baking pan coated with cooking spray; sprinkle with remaining 1/4 cup nuts. Bake at 350° for 19 minutes or until a wooden pick inserted in center comes out with moist crumbs clinging. Cool in the pan on a rack. Cut into squares.