Preheat oven to 325F. Line a 8x8x2 metal pan with parchment foil paper.***
Over medium heat, melt butter. Stir frequently as it continues to bubble. When the amount of bubbles subsides, there are small brown specs, and it smells like nutty caramel, remove pan from heat.
Add sugar, cocoa powder and salt to combine.
In separate bowl, beat eggs. After mixture has cooled in pot 4-5 minutes, slowly pour in eggs, stirring constantly until well combined.
Add vanilla, stir to combine.
Add flour and baking powder, stir to combine.
Add walnuts, stir to combine.
Bake 25 minutes. Enjoy!
Video
Notes
* Measure your cocoa as you would flour - by scooping and leveling. ** I love the grain size of the kosher salt. It doesn't fully incorporate so you can taste the not-so-frequent but oh-so-wonderful bits of salt against the gooey sweet. *** If you've never tried this stuff for baking, you should. Foil on one side, parchment on the other. If you want to cut every brownie you make into a cute square or triangle, use this stuff so you can pull the entire batch out of the pan. Else, grease dish and execute your evil plan of having to eat the first brownie because it didn't scoop out properly.