Blackberry Cheesecake - cooking recipe

Ingredients

2 sticks butter
2/3 box graham crackers (2 packages)
2 Tbsp sugar
8 8 oz packages cream cheese, at room temp
4 eggs
2 cups sugar
2 tsp. Vanilla
4 Tbsp cornstarch
2 cups sour cream
1 cup blackberry jam, heated

Preparation

Melt butter. Pulvarize graham crackers. Mix graham cracker crumbs, butter, and sugar. Press into bottom of 12\" springform pan. Beat other ingredients, except for jam, in a mixer until well blended. Pour in crust. Heat blackberry jam. Pour into cake and stir into swirls. Bake at 450 degrees for 20 minutes, reduce temperature to 200 and bake 1 hour. Check for doneness by looking for center to be firm.Turn off oven and slow to cool with for ajar for 1 hour. Chill 2 hours before serving.