Start by creaming your butter and sugar together in a standing mixer. You should cream for 2-3 minutes until the sugar and butter are fluffy and lighter in texture & color.
Stir in your eggs & vanilla extract until just incorporated
Pour in the flour, cocoa powder & sea salt. Stir until completely combined.
Dump your batter into a greased 9x13 pan
Bake for 45 minutes, or until the center is no longer giggly. You can test by sticking a fork in the center of your brownie pan. If the fork comes out with just a few brownie crumbs, it is ready!