Creating delicious fudgy brownies is simple if you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and line a 9×13-inch baking pan with parchment paper.
2. Melt Butter: In a medium saucepan, melt the unsalted butter over low heat. Stir occasionally until completely melted.
3. Mix Sugar and Eggs: Remove from heat, and whisk in the granulated sugar until well combined. Then add the eggs one at a time, mixing well after each addition. Add the vanilla extract and stir.
4. Combine Dry Ingredients: In a separate bowl, sift together the all-purpose flour, unsweetened cocoa powder, and salt.
5. Combine Wet and Dry Ingredients: Gradually stir the dry mixture into the wet mixture until fully combined. Don’t overmix; just stir until no flour streaks remain.
6. Add Chocolate Chips and Nuts: If desired, fold in the semi-sweet chocolate chips and chopped nuts for extra texture and flavor.
7. Pour into Baking Pan: Pour the batter into the prepared baking pan, and spread it evenly with a spatula.
8. Bake: Place the pan in the preheated oven and bake for 25-30 minutes. A toothpick inserted in the center should come out with a few moist crumbs but not wet batter.
9. Cool: Remove from the oven and allow the brownies to cool in the pan for 10-15 minutes. Then lift them out using the parchment paper and let them cool completely on a wire rack.
10. Cut and Enjoy: Once cooled, cut the brownies into generous squares and serve!

These step-by-step instructions ensure that you create fudgy brownies that are delicious every time.