Yield:  1 - 9 inch springform pan

Ingredients

• 1 1/2 cups finely crushed chocolate wafer cookies
• 1 cup white sugar
• 1/4 cup melted butter
• 2 (8 ounce) packages 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 white sugar
• 2 tablespoons water
• 1 teaspoon vanilla extract
• 1/2 cup all-purpose flour
• 1 cup semisweet chocolate chips
• 2 teaspoons white sugar

Directions

1. Preheat oven to 350 degrees F (175 degrees C).
2. Mix the chocolate wafer cookie crumbs with 2 tablespoons of the white 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.
3. To Make Cookie Dough: In a bowl beat 1/4 cup butter or margarine with the brown sugar and 1/4 cup of the white sugar. Stir in the water and 1 teaspoon of the vanilla. Beat in the flour and the semisweet chocolate chips. Stir until combined.
4. 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.
5. 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.
6. To Make Topping: Mix the remaining 1 cup sour cream, 1 teaspoon vanilla, and the 2 teaspoons white sugar until smooth. Spread over hot cake.

Chocolate Chip Cheesecake I Chocolate Cookie Cheesecake