Ingredients:

• 1 cup all-purpose flour 
• 11/2 cups sugar 
• 3 large eggs
• 1 tsp. Vanilla extract
• 1/4 tsp. salt
• 8 tbsp. unsalted butter
• 4 ounces bittersweet chocolate, coarsely chopped
• 1 cup walnuts or pecans, chopped  (Optional)

Preparation:

• Preheat the oven to 350° F (175°C). Grease a 9 x 12-inch cake pan.
• Melt the butter and chocolate in a very heavy saucepan over a very low heat. Set aside to cool it down fully.
• In a large mixing bowl, beat the eggs. Add sugar and whisk until well blended.
•  Add the cooled chocolate and butter mixture to it. Also, add the vanilla extract and mix until well blended.
• Add flour, salt and the nuts, stir just to mix it nicely.
• Pour the batter into the prepared pan.
• Bake in a pre-heated oven for 25 minutes, or until  a toothpick inserted into comes out clean.
• Let the brownies stand in the pan until completely cool. Slice into square pieces or shape of your choice and serve.

Tip : Store  the brownies in a tightly covered container at the room temperature for upto 4 days.

Note :  If using a glass dish to bake, reduce the oven temperature to 325°F.