1 1/2 cups chocolate cookie crumbs
1/4 cup butter, melted
2 8-ounce packages cream cheese, softened
1 15-ounce container ricotta cheese
3/4 cup sugar
1 12-ounce bag semi-sweet chocolate chips, melted and cooled
3 eggs
1/4 cup cornstarch
1 tsp. vanilla
1/2 tsp. salt
Line the bottom of a 9-inch springform pan with parchment paper, set aside. In a small bowl, mix cookie crumbs and melted butter. Press mixture into the bottom of the pan. Grease sides of springform pan with butter or pan coating spray, set aside.
In a large mixing bowl, combine cream cheese, ricotta cheese and sugar on low speed until blended. Add melted chocolate chips and vanilla. Mix in eggs, one at a time, then add cornstarch and salt. Pour mixture into springform pan. Bake at 350 degrees for 1 hour and 15 minutes. Turn oven off and prop open oven door with a wooden spoon. Cool cake for 1 hour in oven then remove from oven to cool completely.
