Ricotta Cheese Cake with Cinnamon

1 yellow cake mix
1 1/2 lbs. Ricotta cheese
4 eggs
3/4 cup of sugar
1 tsp of vanilla

Make cake mix as directed on package in 9"x13" greased and floured pan.
Beat together cheese, eggs, sugar and vanilla.
Spoon mixture on top of batter, a little at a time, spread as you spoon it.
Bake at 350 degrees for 40 to 45 minutes.
After cooled, spread 4 ounces Cool Whip on top and chopped, real fine, walnuts, 1/2 cup.
Sprinkle with cinnamon and sugar mixture, about 1/4 cup.