Brownies for a Crowd

This is another great recipe from Sister's Cafe. I only had regular cocoa instead of the Dutch processed kind, it still turned out great. This recipe is a definite keeper.
Brownies for a Crowd (cookie sheet size)
submitted by Melanie
3 cups sugar
1/2 cup + 1 Tbsp cocoa (I prefer Dutch-it is darker)
1/2 tsp salt
1 1/2 cups melted butter
5 eggs
2 1/2 tsp vanilla
3 cups flour
Mix together and spread on a buttered cookie sheet (standard stainless steel). Bake in a preheated 350 oven for 30 minutes. Be sure to not overcook. Frost
Frosting:
1/2 cup butter
3 1/2 tsp cocoa (I used 6 TBLS of regular cocoa)
6 TBsp milk
1 tsp vanilla)
Powdered Sugar--I have never measured. I just add until I get the consistency I want. If it becomes too thick I just add a little more milk.
Mixl together butter and cocoa  ( I microwaved them for 1 minute and add powdered sugar,milk and vanilla. You can add nuts into the frosting or sprinkle on top if you would like.