Melt chocolate and butter: In the top compartment of a double boiler, melt the chocolate and butter together.
Continue melting until silky and smooth (it's only going to get better). Then, remove from heat.
Add sugar, salt, and vanilla to the bowl with the melted chocolate and butter. Mix together well with a wooden spoon.
One at a time, add eggs to the bowl. Using a wooden spoon or spatula, incorporate the first egg completely before mixing with the second egg. Mix in the flour. Stir flour together with remaining ingredients until the batter starts to pull away from the sides of the bowl (about 1 minute). Gently fold in chopped pecans.
Prepare baking pan: Line an 8" inch METAL baking pan with parchment paper or foil.
Bake: Bake in a preheated 400-degree oven for 20 to 25 minutes or until the brownies pull away from the sides of the pan with ease.
Stop Cooking Process: While the brownies are baking, fill a pan that will fit the 8" baking pan with ice and cold water. Remove the brownies from the oven promptly and submerge the baking pan in an ice bath; be careful not to get the brownies wet. Let cool completely.
Slice and serve: Once brownies have cooled, cut into even squares and enjoy!