Texas Sheet Cake

You Freeze Texas Sheet Cake?
Yes you can freeze Texas sheet cake. If you plan to freeze it go ahead and bake the cake in a foil pan. Cover the cooled and iced cake tightly in at least one layer of storage wrap then at least one layer of foil. Freeze for up to one month. Thaw in the refrigerator or at room temperature.
Ingredients
Cake
2 cups allpurpose flour
2 cups white sugar
1 teaspoon baking soda
½ teaspoon salt
½ cup sour cream
2 eggs
1 cup butter
1 cup water
5 tablespoons unsweetened cocoa powder
Icing
6 tablespoons milk
5 tablespoons unsweetened cocoa powder
½ cup butter
4 cups confectioners sugar
1 teaspoon vanilla extract
1 cup chopped walnuts Optional
Directions
Preheat the oven to 350 degrees F 175 degrees C. Grease and flour a 10x15inch jelly roll pan.
Make cake Combine flour sugar baking soda and salt in a mixing bowl. Beat in sour cream and eggs.
Melt butter in a saucepan over low heat. Stir in water and cocoa powder. Bring mixture to a boil then remove from the heat. Allow to cool slightly then stir cocoa mixture into the flour and egg mixture until blended. Pour batter into the prepared pan.
Bake in the preheated oven until a toothpick inserted into the center comes out clean about 20 minutes.
While the cake is baking make icing Combine milk cocoa powder and butter in a large saucepan over medium heat. Bring to a boil then remove from heat. Stir in confectioners sugar and vanilla then fold in walnuts mixing until blended.
Spread icing over warm cake.