Chocolate Sheet Cake

This is a wonderful recipe from the beloved Pioneer Woman. If you haven't seen her website you should check it out. I got this recipe from her cookbook, which is just beautiful.
Cake:
2 cups all purpose flour
2 cups sugar
1/4 tsp salt
1/2 cup buttermilk
2 large eggs
1 tsp vanilla
1 tsp baking soda
1/2 pound (2 sticks) butter
4 heaping Tablespoons cocoa powder

1. In a large bowl, combine the flour, sugar, and salt. Stir together and set aside.
2. In another bowl, mix the buttermilk, eggs, vanilla and baking soda. Mix with a fork and set aside.
3. Then, in a medium saucepan, melt the butter and add the cocoa and then whisk together to combine.
4. Meanwhile bring 1 cup water to a boil.
5. When the butter is melted, pour the boiling water in the pan. Allow to bubble for a moment, then turn off the heat.
6. Pour the chocolate mixture into the flour mixture.
7. Stir together for a moment to cool the chocolate, then pour in the egg mixture.
8. Stir together until smooth, then pour into an un-greased jelly roll pan (rimmed baking sheet) and bake for 20 minutes in a 350 degree oven.

Icing:
1 3/4 sticks butter
4 heaping Tablespoons cocoa powder
6 Tablespoons milk
1 tsp vanilla
1 pound powdered sugar
1/2 cup finely chopped pecans

1. Melt the butter in a saucepan over medium-low heat.
2. Add the cocoa powder and stir until smooth.
3. Add the milk and vanilla.
4. Add powdered sugar, stir together
5. Dump in the chopped pecans and stir until well combined.
6. Immediately after removing the cake from the oven, pour the warm icing over the top. You'll want to avoid doing much spreading, so try to distribute it evenly as you pour.

This cake is completely delicious, and it is great for large groups of people. I took this to a church "friendship dinner" with 3 other families and it was plenty for all of us, and I brought home leftovers. Although, I wouldn't recommend bringing home the leftovers. :) I think we all saw how much butter is in this cake. :)