In mixer combine sugar, oil, eggs and cinnamon. Gradually add sifted flour and soda. Batter will be hard at low speed add in apples and vanilla fold in pecans. Grease 9 x 13 line with parchment paper so that it goes across the width of the pan and extra hangs over the edges. Spray paper with pam. Bake in 350°f for 45 min. When cake is done let sit in the pan for 5 minutes then pull on the parchment paper to lift it out of the pan. Let sit on cooling rack until cooled.
Mix all icing ingredients together in electric mixer. When cake has cooled, place serving plate inverted on the cake. Flip cake onto pan and remove parchment paper. Spread icing on top of cake, sprinkle pecans on top (if desired) and serve.
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