Best Brownies

*Mix together*
3 cubes softened butter
3 c. sugar
1/2 c. cocoa
*Add & Stir In*
6 eggs
*Add Remaining Ingredients*
2 1/4 c. flour
1/2 tsp. salt
2 tsp. vanilla
*Bake on greased cookie sheet @ 350 for 25 minutes.