Grease an 8-inch square pan. Dust lightly with cocoa and shake out excess.

Melt butter and mix it with cocoa powder. Then add sugar, eggs, vanilla extract, flour and salt. Mix to combine. Stir in toasted pecans, if desired.

Butter the baking pan lightly and sprinkle flour or cocoa over the pan until covered. This will help the mixture not to stick to the dish.

Spread brownie batter evenly in pan and put in oven to bake at 325°F for 35 to 40 minutes. When a tooth pick is inserted and it comes out clean the brownies are ready.

Allow to cool until warm before cutting.