Melt the butter in a saucepan over medium heat, stirring frequently, until it turns golden brown and has a nutty aroma.
Remove the browned butter from heat and let it cool slightly.
In a large bowl, whisk together the browned butter and brown sugar until combined.
Add the eggs one at a time, whisking well after each addition.
Stir in the vanilla extract.
In a separate bowl, whisk together the flour, cocoa powder, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
Pour the batter into a greased baking pan and bake at 350°F until a toothpick inserted in the center comes out clean.
Allow the brownies to cool completely before cutting and
serving
.
