1 pkg yellow cake mix
1 small pkg vanilla instant pudding
3/4 cup water
3/4 cup oil
1/2 tsp butter flavoring
1 tsp vanilla
4 eggs
1/4 cup walnuts, chopped
1/4 cup sugar
2 tsp cinnamon

Mix together cake mix, pudding, water, oil and butter flavoring. Beat in eggs, one at a time, beating well after each egg. Continue to beat for 5-6 minutes on med-high speed. Grease bundt pan well with butter and sprinkle walnuts in bottom of pan. Mix together the cinnamon and sugar. Pour in a layer of batter, then sprinkle 2 T of cinnamon sugar and repeat. Sprinkle top with cinnamon sugar. Bake at 350 degrees for one hour. Let stand for 10 minutes and invert onto serving plate.