Stir flour, baking soda, salt, and cinnamon. Peel, core, and finely chop apples;set aside.
In a large mixer bowl stir together eggs and vanilla; beat on high speed of electric mixer for 2 minute or light. Gradually add oil, beating for 2 minute or until thick. Gradually beat in sugar. Add dry ingredients, apples, and walnuts alternately to beaten mixture, beating well after each addition. Beat at medium speed for 3 minutes.
Turn batter into prepared.
Bake for 55 to 60 min or until cake test done.
Place cake on wire rack to cool for 10 to 15 minute
Removed from pan; cool throughly on rack.
Drizzle with powdered sugar icing.
Powdered Sugar Icing.
Mix everything together; until pouring consistency.