Cake

• 1
  Preheat oven to 375°F. Butter a 16x10x1 inch baking pan (or Baker’s half sheet pan).
• 2
  Mix flour and sugar in a large mixing bowl; set aside.
• 3
  In a saucepan, combine butter, cocoa, and water; bring to a boil and take off heat.
• 4
  Stir the butter/cocoa mixture into the flour/sugar mixture. Add sour cream, eggs, vanilla, baking soda and salt.  Mix well.
• 5
  Pour into prepared pan. Bake 15-20 minutes or until cake tests done.

Icing

• 1
  In a saucepan, combine butter, cocoa, and milk.  Bring to a boil and remove from heat.  
• 2
  In a mixing bowl, combine powdered sugar and vanilla.  
• 3
  Add hot butter/cocoa mixture to sugar mixture; beat well.

•  !
  Spread icing over cake as soon as it comes out of the oven.