Texas Sheet Cake

Ingredients

• 1 cup (225 ml) water
• 1 cup (225 ml) butter
• 4 tbsp (60 ml) cocoa
• 2 cups (475 ml) sugar
• 2 cups (475 ml) flour
• 1 tsp (5 ml) baking soda
• 2 eggs
• 1/2 pint sour cream
• 1/2 cup (125 ml) butter
• 2 tbsp (30 ml) cocoa
• 7 tbsp (100 ml) milk
• 1 tsp (5 ml) vanilla
• 1 box powdered sugar