01 - 
                        15 whole graham crackers.
                      
                    
                      
                        02 - 
                        1/4 cup granulated sugar (for crust).
                      
                    
                      
                        03 - 
                        1/2 cup unsalted butter, melted (for crust).
                      
                    
                      
                        04 - 
                        16 oz cream cheese, room temperature.
                      
                    
                      
                        05 - 
                        2/3 cup granulated sugar (for cheesecake).
                      
                    
                      
                        06 - 
                        1 1/2 tablespoons all-purpose flour.
                      
                    
                      
                        07 - 
                        2 large eggs.
                      
                    
                      
                        08 - 
                        1 large egg yolk (for cheesecake).
                      
                    
                      
                        09 - 
                        1/4 cup sour cream.
                      
                    
                      
                        10 - 
                        1 teaspoon vanilla extract.
                      
                    
                      
                        11 - 
                        1/2 cup granulated sugar (for chocolate layer).
                      
                    
                      
                        12 - 
                        1/4 teaspoon kosher salt.
                      
                    
                      
                        13 - 
                        1/4 cup cocoa powder.
                      
                    
                      
                        14 - 
                        1/4 cup cornstarch.
                      
                    
                      
                        15 - 
                        2 cups whole milk.
                      
                    
                      
                        16 - 
                        4 large egg yolks (for chocolate layer).
                      
                    
                      
                        17 - 
                        4 oz bittersweet chocolate, chopped.
                      
                    
                      
                        18 - 
                        2 tablespoons unsalted butter (for chocolate layer).
                      
                    
                      
                        19 - 
                        1 1/2 cups cold heavy whipping cream.
                      
                    
                      
                        20 - 
                        2 tablespoons confectioner's sugar.
                      
                    
                      
                        21 - 
                        1 oz semi-sweet chocolate (for garnish).