1 pkg. yellow cake mix
1 sm. instant vanilla pudding
4 eggs
1 c. water
1/2 c. butter, stick or tub
1 tsp. vanilla
1/4 c. sugar
1 tsp. cinnamon

Combine first 6 ingredients in large mixing bowl. Blend. Beat at medium speed 10 minutes. Pour into greased bundt pan. Combine sugar and cinnamon. Sprinkle over top of batter and with spatula or knife. Cut through batter. Bake in preheated 350 degree oven for 45 minutes. Cool in pan 10 minutes. Remove and sprinkle with confectioners' sugar if desired.