1 pkg. yellow cake mix
1 pkg. pistachio instant pudding mix
2/3 c. oil
3/4 c. water
4 eggs
1/2 c. sugar
1/2 tsp. cinnamon
1/2 c. chopped nuts

Grease pan heavily and dust with flour. Mix cake mix, pudding, oil, water, and eggs. Beat well. Pour mixture into prepared 9 x 13 inch cake pan. Top with sugar, cinnamon, and nut mixture. Cut in with knife. Bake at 350 degrees for 45 minutes. Cool 10 minutes in pan. Turn out on cake plate and dust with powdered sugar.