01 - 
                        1/2 cup granulated sugar.
                      
                    
                      
                        02 - 
                        1 teaspoon vanilla extract.
                      
                    
                      
                        03 - 
                        1 large egg, room temperature.
                      
                    
                      
                        04 - 
                        1 1/4 cups all-purpose flour.
                      
                    
                      
                        05 - 
                        1/2 teaspoon salt.
                      
                    
                      
                        06 - 
                        1 teaspoon vegetable oil.
                      
                    
                      
                        07 - 
                        1/2 cup unsalted butter, softened.
                      
                    
                      
                        08 - 
                        1 teaspoon baking soda.
                      
                    
                      
                        09 - 
                        1/2 cup brown sugar.
                      
                    
                      
                        10 - 
                        2/3 cup creamy peanut butter.
                      
                    
                      
                        11 - 
                        8 ounces mascarpone cheese, room temperature.
                      
                    
                      
                        12 - 
                        1/2 cup toffee bits or chopped peanuts for topping.
                      
                    
                      
                        13 - 
                        8 ounces semi-sweet chocolate, chopped.