Absolutely Best Brownies

I got this from who knows where, but they are just as the name proclaims... The absolute best!!

Preheat oven to 350 degrees fahrenheit.

Grease and flour a 9 x 9-inch pan.

In a bowl , beat together the butter and sugar.

Add eggs and vanilla.

Mix well.

Combine the cocoa , salt , and flour together.

Stir into the sugar mixture.

Stir in the walnuts.

Spread evenly into prepared pan.

Bake for 25 to 30 minutes or until firm.

butter, sugar, eggs, vanilla, cocoa, salt, self-rising flour, walnuts