Texas Brownies

2 cups all-purpose flour
2 cups granulated sugar
1/2 cup butter
1/2 cup shortening
1 cup coffee, strongly brewed
1/4 cup unsweetened cocoa
1/2 cup buttermilk
2 whole eggs
1 teaspoon baking soda
1 teaspoon vanilla extract

Preheat oven to 400 degrees F and lightly grease a 17 x 11-inch baking pan.

In a large mixing bowl, combine flour and sugar.

In a heavy saucepan over medium heat, combine butter, shortening, coffee and cocoa. Stir constantly until heated to a boil. Pour boiling mixture over flour and sugar. Add buttermilk, eggs, baking soda and vanilla extract. Mix well, using a wooden spoon or electric mixer. Pour batter into prepared baking pan. Bake for about 20 minutes or until done in center.

Meanwhile, prepare the frosting.

Frosting
1/2 cup butter
2 tablespoons cocoa
1/4 cup milk
1 1/2 cups confectioners