Step 1

Heat your oven to 300 degrees.

Step 2

In a mixing bowl, blend together the cream cheese and butter until creamy.

Step 3

Mix in the sour cream and eggs until smooth.

Step 4

Blend in the cornstarch, lemon zest, lemon juice, vanilla extract and sugar until well combined.

Step 5

Sooth the batter into a 9 inch Springform pan that is well greased.

Step 6

Bake for 2 hours and 15 minutes.

Step 7

Allow to come to room temperature and then chill for at least one hour before you serve.