FULL SHEET BROWNIES

1 1/2 C. butter
3 C. flour
3 C. sugar
6 eggs
5 Tbsp cocoa
Icing:
1/2 C. butter
3 Tbsp cocoa
1/2 bag powdered sugar
milk to thin

Cream butter and sugar. Add eggs and mix. Combine flour and cocoa and add to mixture. Spread into a greased jelly roll pan. Bake at 350 for 25 minutes. Cool on cooling rack. Prepare icing and spread over brownies when cooled