Tory Avey describe this as Rich, Moist Chocolate Sheet Cake Topped with Chocolate Frosting and Toasted Pecans. Tried-and-True, Quintessential Texas Dessert Recipe.

Cake Ingredients

• 2 cups all-purpose flour
• 2 cups sugar
• 1 tsp baking soda
• 1 tsp kosher salt
• 1 cup (2 sticks) butter
• 1 cup water
• 1/3 cup cocoa powder
• 1 cup sour cream
• 2 eggs
• 1 tsp vanilla

Frosting Ingredients

• 1/2 cup (1 stick) butter, melted
• 1/3 cup milk
• 1/4 cup cocoa powder
• 1 box (16 ounces or 1 lb) powdered sugar
• 1 tbsp vanilla
• 1 cup chopped pecans, toasted (optional)

You will also need

• 13-inch x 18-inch x 1-inch jelly roll pan, nonstick cooking spray, mixing bowls, medium saucepan

Get the directions on how to make it here:

http://toriavey.com/toris-kitchen/2016/02/texas-sheet-cake/