Preheat oven to 350°F.

In a medium bowl, combine the graham cracker crumbs, sugar, cinnamon and melted butter.

Mix well to combine.

Press the crumbs onto the bottom and up the sides of an 8 X 8 inch baking dish.

In a second bowl, mix the sugar and corn starch.

Add the butter and eggs.

Beat well.

Add cream cheese and blend well.

Add the sour cream and vanilla and blend well.

Pour into the pan or divide between the pie shells and bake for 10 minutes.

Reduce heat to 250°F and bake for another 45 minutes for pies, 70 to 80 minutes for an 8 X 8 pan.