Texas Sheet Cake Brownies

2 c Flour
2 c Sugar
Place above ingredients in mixing bowl.
In pan bring following ingredients to a boil:
1 c Butter
4 T Cocoa
1 C Water
Add boiling mixture to mixing bowl and mix together.
Then add remaining ingredients:
2 Beaten Eggs
1 t Soda
1/2 t Cinnamon
1/2 c Buttermilk
1 t Vanilla
Mix well and pour in large cookie sheet. Bake at 350 for 25 minutes. Let cool then frost.
Frosting
3 T Cocoa
1/2 c Butter
6 T Milk
1 lb Powdered Sugar
1 t Vanilla
Bring first 3 ingredients to a boil and pour in bowl. Add powdered sugar and vanilla and mix until well blended, frost.