Ingredients

1-3/4 cups crushed chocolate chip cookies or chocolate wafer crumbs1/4 cup sugar1/3 cup butter, meltedFILLING:3 packages (8 ounces each) cream cheese, softened1 cup sugar1 cup sour cream1/2 teaspoon vanilla extract3 large eggs, lightly beatenCOOKIE DOUGH:1/4 cup butter, softened1/4 cup sugar1/4 cup packed brown sugar1 tablespoon water1 teaspoon vanilla extract1/2 cup all-purpose flour1-1/2 cups miniature semisweet chocolate chips, divided

Preparation

In a small bowl, combine cookie crumbs and sugar; stir in butter. Press onto the bottom and 1 in. up the side of a greased 9-in. springform pan. Place pan on a baking sheet.

In a large bowl, beat cream cheese and sugar until smooth. Beat in sour cream and vanilla. Add eggs; beat on low speed just until combined. Pour over crust.

In another bowl, cream butter and sugars until light and fluffy, 5-7 minutes. Add water and vanilla. Gradually add flour and mix well. Stir in 1 cup chocolate chips.

Drop dough by teaspoonfuls over filling, gently pushing dough below surface (dough should be completely covered by filling).

Bake at 350° until center is almost set, 45-55 minutes. Cool on a wire rack for 10 minutes. Carefully run a knife around edge of pan to loosen; cool 1 hour longer. Refrigerate overnight.

Remove sides of pan. Sprinkle with remaining 1/2 cup chips. Refrigerate leftovers.