Chocolate Chip Cookie Dough Cheesecake

1 1/2 cups finely crushed chocolate wafer cookies
1 cup granulated sugar
1/4 cup melted butter
16 ounces cream cheese, diced
2 cups sour cream
3 eggs
2 teaspoons vanilla extract
1/4 cup butter
1/4 cup packed brown sugar
1/4 cup granulated sugar
2 tablespoons water
1 teaspoon vanilla extract
1/2 cup all-purpose flour
1 cup semisweet chocolate chips
2 teaspoons granulated sugar

Preheat oven to 350 degrees F (175 degrees C).

Mix the chocolate wafer cookie crumbs with 2 tablespoons of the sugar, and the melted butter. Press firmly into the bottom and 1/2 inch up the sides of one 9-inch springform pan. Bake at 350 degrees F (175 degrees C) for about 8 minutes.

To Make Cookie Dough: In a bowl beat 1/4 cup butter or margarine with the brown sugar and 1/4 cup of the sugar. Stir in the water and 1 teaspoon of the vanilla extract. Beat in the flour and the semisweet chocolate chips. Stir until combined.

To Make Cheesecake: In a food processor or with a mixer beat 1 cup of the white sugar, and all the cream cheese. Add 1 cup of the sour cream, the eggs, and 1 teaspoon of the vanilla. Mix well and pour into prepared crust.

Drop cookie dough in 2 tablespoon portions evenly over the top of the cake, pushing dough beneath the surface. Bake at 350 degrees F (175 degrees C) for about 40 minutes. Cake will jiggle slightly in center. Spread topping over hot cake. Let cake cool than chill in a refrigerator until cold, at least 4 hours.

To Make Topping: Mix the remaining 1 cup sour cream, 1 teaspoon vanilla extract and the 2 teaspoons sugar until smooth. Spread over hot cake.