Kahlua Cheesecake

1 1/3 cups chocolate cookie crumbs
1/4 cup butter, melted
1 tbsp sugar
1 1/2 cups semi-sweet chocolate chips
1/4 cup Kahlua
2 tbsp butter
2 eggs, beaten
1/2 cup sugar
1/4 tsp salt
1 cup sour cream
2 packages (8 oz each) cream cheese, softened

Mix together the cookie crumbs, 1/4 cup melted butter and 1 tbsp sugar. Press into a 9 inch spring form pan. Preheat the oven to 350 degrees F. Over medium heat melt together the choc chips, Kahlua and butter; set aside. Combine the eggs, sugar and salt. Add the sour cream and blend well. Add the cream cheese and beat until just smooth. Gradually blend in the chocolate mixture. Pour over the crust. Bake 35 minutes, until filling is barely set in the center. Turn off the oven and let stand in the oven with the door open for 15 minutes. Remove from oven and let stand at room temperature for 1 hour. Chill.