This sounded so yummy, I saved a copy for my files.
The only thing I wonder about is the cooking time.
15-20 minutes for this size cake doesn't seem like quite long enough. Would appreciate your letting me know how it turns out. Thanks.

Cinnamon Chocolate Cake

2 cups all-purpose Flour
2 cups Sugar
1 1/2 teaspoons ground Cinnamon
1/4 teaspoon Salt
1 cup Water
1/2 cup vegetable Oil
1/2 cup Butter or Margarine
1/4 cup baking Cocoa
2 Eggs
1/2 cup Buttermilk
1 teaspoon Vanilla Extract
1 teaspoon baking Soda

FROSTING
1/2 cup Butter or Margarine
1/3 cup Whipping Cream
1/4 cup baking Cocoa
1 1/2 teaspoons ground Cinnamon
3 cups Confectioner’s Sugar
1 teaspoon Vanilla Extract
1 cup finely chopped Walnuts

In mixing bowl, combine the first four ingredients.
In a saucepan, combine the water, oil, butter and cocoa; bring to a boil over
medium heat.
Pour over dry ingredients; mix well.
Add eggs, buttermilk, vanilla and baking soda; mix well.
Pour into a greased and floured 15 X 10 X 1 inch baking pan.
Bake at 375° for 15-20 minutes or until a toothpick inserted near the center
comes out clean.
Meanwhile, for frosting, combine butter, cream, cocoa and cinnamon in a
saucepan.
Cook and stir over medium heat until butter is melted and mixture is heated
through.
Remove from the heat; beat in sugar and vanilla until smooth.
Stir in walnuts.
Carefully spread over hot cake.
Cool completely.

Yield: 24-30 servings.

(Taste of Home - Aug/Sep 1997)