Directions:
Preheat the Oven:
Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan, or line it with parchment paper for easy removal.
Make the Brownie Batter:
In a large mixing bowl, combine the melted butter and cocoa powder, stirring until smooth.
Add the flour and sugar, mixing until combined.
Stir in the eggs, one at a time, followed by the vanilla extract. Mix until the batter is smooth and well incorporated.
Fold in the chopped nuts if using.
Bake the Brownies:
Pour the brownie batter into the prepared baking pan, spreading it evenly.
Bake in the preheated oven for 20-25 minutes. Check for doneness at 20 minutes by inserting a toothpick into the center; if it comes out with just a few moist crumbs, they are done. Avoid overbaking to keep them fudgy!
Prepare the Icing:
While the brownies are baking, make the icing. In a medium bowl, mix together the softened butter, milk, cocoa powder, powdered sugar, and a dash of salt. Beat until smooth and creamy.
Frost the Brownies:
Let the brownies cool for about 10 minutes after removing them from the oven. While they’re still slightly warm, spread the chocolate icing over the top. This allows the icing to melt a little, creating a glossy and rich finish.
Cool and Serve:
Allow the brownies to cool completely before cutting into squares. This will help the icing set and make them easier to slice.
Pro Tip:
For an extra touch, sprinkle some chocolate chips or additional chopped nuts on top of the icing while it’s still soft.
Enjoy these rich, fudgy brownies that will remind you of the good old days! Perfect for bake sales, potlucks, or just as a special treat for yourself. 
