Stacie's Texas Sheet Cake

Source: Stacie Allred

Ingredients:
Cake:
2 C All-Purpose Flour
2 C White Sugar
1 tsp Baking Soda
1 tsp Ground Cinnamon
1/2 tsp Salt
2 Tbsp *Buttermilk Powder (found in the baking aisle of your grocery store)
1/2 C Butter (1 stick)
1/2 C Shortening
1/4 C Cocoa Powder
1 C Water
2 Eggs, beaten
1/2 C water

Frosting:
1/2 C Butter (1 stick)
6 Tbsp Milk
1/4 C Cocoa Powder
1 tsp Vanilla Extract
4 C Powdered Sugar, sifted.

Directions:
Cake:

1. Preheat oven to 350F/175C. 
2. Grease and flour 13 x 18" half-sheet cake pan. (You can also use a 10 x 15" jelly roll pan for this recipe.)
3. In large bowl, sift together flour, sugar, baking soda, cinnamon, salt and buttermilk powder. Set aside.
4. In a small saucepan, combine butter, shortening, cocoa powder and 1 C water. Bring to a boil and cook for 1 minute.
5. Pour this liquid over the flour and sugar mixture in the bowl and mix well.
6. In a small bowl, beat the eggs and add 1/2 C water. Blend this together well, and add to the cake batter. Mix well.
7. Put batter into prepared pan. Bake for 30-35 minutes, or until a toothpick inserted in the middle comes out clean.
8. As soon as you remove the cake from the oven, make the frosting. (Cake should be frosted no longer than 10 minutes out of the oven.)

Frosting:

1. Add first 3 frosting ingredients into a small saucepan. Bring to a boil and cook for 1 minute. Remove from the stove and add vanilla extract.
2. Place powdered sugar in a medium mixing bowl.
3. Add in the chocolate mixture. Mix well.
4. Frost while the cake is still warm.

*I have used Buttermilk Powder for years, and just LOVE it! I don't normally use Buttermilk, so, when I have a  recipe that calls for it, I determine how much Buttermilk Powder and water I would need, according to directions on the package, and add the powder in with my dry ingredients, and the water with my wet ingredients. It stores well in my fridge. :)

Recipe adapted from Allrecipes.com