Disgustingly Rich Brownies

"1.Preheat oven to 350F then smear the inside of an 8-9 inch baking pan with shortening.2.Melt the butter over low heat.3.In a mixing bowl stir cocoa and sugar together. Then stir in the butter.4.Add the eggs and vanilla and stir together.5.Add flour and salt, mix just until smooth.(if you're adding walnuts, now's the time)Cooking:1.Scrape the mixture out into the greased pan and spread out in a even layer.2.Bake in a 350F oven until the brownies just begin to pull away from the sides of the pan(or until you can stick a toothpick in and pull it out with no batter sticking to it). Takes about 40 to 50 minutes.3.Remove pan from the oven let cool for a while before cutting."