Supreme Chocolate Cheesecake
["1 1/2 c. (16) crushed creme-filled cookies (chocolate)", "1/4 c. margarine, melted", "3 (8 oz.) pkg. cream cheese, softened", "1 (14 oz.) can sweetened condensed milk", "3 eggs", "1 (12 oz.) pkg. semi-sweet chocolate chips, melted", "2 tsp. vanilla", "1/3 c. margarine", "2 Tbsp. orange flavored liqueur", "1/2 c. powdered sugar", "1 (6 oz.) pkg. semi-sweet chocolate chips, melted"]
["Combine crumbs and margarine.", "Press onto bottom of 9-inch spring-form pan.", "Combine cream cheese and milk, mixing at medium speed on electric mixer until well blended.", "Add eggs, one at a time, mixing well after each addition.", "Blend in chocolate and vanilla; pour over crust.", "Bake at 300\u00b0 for 1 hour and 10 minutes. Loosen cake from rim of pan.", "Cool before removing from pan."]
["creme-filled cookies", "margarine", "cream cheese", "condensed milk", "eggs", "semi-sweet chocolate chips", "vanilla", "margarine", "orange flavored liqueur", "powdered sugar", "semi-sweet chocolate chips"]