3 sticks unsalted butter
2 cups cocoa sifted
2 cups sugar
2 cups brown sugar
2 tablespoons vanilla
2 cups flour
1 teaspoon salt
Preheat oven to 350˚.
Lightly grease a 9 x 13 pan.
Melt butter, add cocoa, stir and let cool slightly.
In a large bowl whisk eggs; add sugar, and vanilla, stir.
Add cooled butter chocolate mixture, fold in flour and salt until just combined, do not over mix.
Spread evenly in pan, making sure corners are filled.
Bake 40 to 45 minutes or until crust forms on surface or toothpick inserted in center comes out almost clean.