Texas Chocolate Sheet Cake 5 Recipe

Sift together sugar and next 4 ingredients in a large bowl. Stir together butter and next 3 ingredients in a sauce pan over medium-low heat, stirring constantly, 5 minutes or just until butter and shortening melt. remove from heat, pour over sugar mixture, stirring until dissolved. Cool slightly. Stir in buttermilk, eggs, and vanilla. Pour into a greased an slightly floured 15x10 inch jelly roll pan. Bake at 350° for 30 to 35 minutes (cake will have a fudge-like texture). Spread chocolate icing over hot cake. Chocolate icing: Combine butter, cocoa, and milk in a saucepan. Cook over low heat 5 minutes or until butter milts. Cook over medium heat until bubbles appear on the surface. Remove from heat gradually stir in sugar and vanilla. Beat at medium speed with an electric mixer until smooth and sugar dissolve, about one minute. You can stir in the pecans or add them after spreading the icing on cake.