1. 1. Preheat the oven to 350°F (175°C) and grease a baking dish.

2. 2. In a mixing bowl, combine 1 cup of all-purpose flour, 1 cup of chopped baking chocolate, 1 cup of brown sugar, and 1 cup of chopped walnuts.

3. 3. Mix the ingredients until well combined.

4. 4. Pour the batter into the greased baking dish and spread it evenly.

5. 5. Bake in the preheated oven for 25-30 minutes or until a toothpick inserted in the center comes out clean.

6. 6. Allow the brownies to cool before cutting into squares and serving.