Mix all together, mixing one egg at a time. Beat 6 minutes on med-high speed. Butter bundt pan well and sprinkle 1/4 cup chopped walnuts in bottom of pan. Mix separately 1/4 cup sugar and 2 tsp. cinnamon. Pour in layers of batter, then sprinkle 2 Tbls. of mixture and alternate. Sprinkle what's left on top. Bake at 350 degrees for one hour. Let stand for 10 minutes (no longer) and dump onto serving plate.