Texas Sheet Cake recipe

Did y'all notice that I included the instructions but not the ingredients for Texas Sheet Cake in my newsletter? Sorry about that. Here is the complete recipe.

Texas Sheet cake

Ingredients:

2 cups all-purpose flour
2 cups white sugar
1 teaspoon baking soda
1/2 teaspoon salt
1/2 cup sour cream
2 eggs
1 cup butter
1 cup water
5 tablespoons unsweetened cocoa powder
6 tablespoons milk
5 tablespoons unsweetened cocoa powder
1/2 cup butter
4 cups confectioners' sugar
1 teaspoon vanilla extract
1 cup chopped walnuts (optional)

Instructions

Preheat your oven to 350 degrees F. Line a cookie sheet with parchment paper, or spray well with nonstick spray.
In a medium or large saucepan, add 1 cup butter, 1 cup water, and 1/2 cup cocoa. Bring to a boil over medium high heat. Once it boils, take it off the heat.
Let it cool for a minute or two, then stir in brown sugar and 2 teaspoons vanilla.
Meanwhile in a medium bowl combine 2 cups flour, 1 cup granulated sugar, salt, and baking soda.
Add the dry ingredients to the saucepan
Stir well, then add 1/2 cup sour cream and eggs. Blend well until all the lumps are gone.
Pour the batter into the prepared pan and spread evenly to the sides.
Bake at 350 for about 18-20 minutes* (check times below), until a toothpick comes out of the center with no wet batter on it. The sides of the cake should just be starting to pull away from the edge of the pan. Don't over bake!
Meanwhile, make the frosting. Clean out the saucepan you used for the batter** and add 1 stick of butter and 1/4 cup cocoa. Stir together over medium heat until it comes to a boil, then remove from the heat.
Add 6 tablespoons sour cream and 1 teaspoon vanilla extract.
Use a whisk to stir in the powdered sugar. If your cake is not done baking when you finish the glaze, stir it every now and then to break up the hardened shell on top.
When the cake is done, take it out of the oven and let cool for 15-20 minutes. Spread the glaze over the cake.