Best-Ever New York Style Cheesecake

Name: Best-Ever New York Style Cheesecake
Cook time: 3 h
Total time: 3 h
Cuisine: American
Ingredients: 1 and 3/4 ounces (50 grams) Noblesse or other good-quality dark chocolate; 1 and 3/4 ounces (50 grams; approximately 3 and 1/2 tablespoons) margarine (use soy-free, if needed); 1 egg, lightly beaten with a fork; 1/2 cup sugar; 1/2 teaspoon Gefen Vanilla Extract; 1/4 cup flour; pinch salt; 1 (12-oz./340-g.) box frozen chocolate chip cookie dough, defrosted (see note); 3 (8-oz./225-g.) tubs whipped cream cheese; 1 cup sugar; 1 cup sour cream; 1 and 1/2 teaspoons Gefen Vanilla Extract; 3 eggs, room temperature; 3 and 1/2 ounces chopped Elite Bittersweet Chocolate; 1/3 cup heavy cream; 2 tablespoons light corn syrup