No-Crust Cheesecake

This cheesecake has no crust,
it's just so very good tasting
you don't even need any crust.
It's got ricotta cheese and
cream cheese and some
sour cream in it.

Ingredients:
1 pound cream cheese
1 pound ricotta cheese
1 cup white sugar
4 eggs
4 tablespoons butter, melted
3 tablespoons all-purpose flour
3 tablespoons cornstarch
2-1/2 teaspoons vanilla extract
2 cups sour cream

Directions:
Preheat oven to 350 degrees F.
In a large bowl, cream the
cheeses and sugar.
Beat in the eggs one at a time,
beating well after each addition.
Add the melted and cooled butter,
flour, cornstarch and vanilla.
Beat until mixture is well combined.
Fold in the sour cream and mix well.
Pour into an ungreased springform pan.
Place pan in the middle of the
preheated oven and bake for 1 hour.
Turn off the oven, leaving cheesecake
in for another 2 hours without
opening the oven door.
Let cake cool completely in pan
and then chill in refrigerator
for at least 2 hours.