01 - 
                        1/2 cup melted, unsalted butter (for the brownie mixture).
                      
                    
                      
                        02 - 
                        1 cup white sugar.
                      
                    
                      
                        03 - 
                        2 large eggs (used in the brownies).
                      
                    
                      
                        04 - 
                        1 teaspoon vanilla (add to brownies).
                      
                    
                      
                        05 - 
                        1/2 cup regular flour.
                      
                    
                      
                        06 - 
                        1/3 cup cocoa powder, unsweetened.
                      
                    
                      
                        07 - 
                        1/4 teaspoon fine salt.
                      
                    
                      
                        08 - 
                        1/4 teaspoon baking powder.
                      
                    
                      
                        09 - 
                        1/2 cup light corn syrup.
                      
                    
                      
                        10 - 
                        Packed 1/4 cup of brown sugar.
                      
                    
                      
                        11 - 
                        1/4 cup melted, unsalted butter (for topping).
                      
                    
                      
                        12 - 
                        2 large eggs (used for the topping).
                      
                    
                      
                        13 - 
                        1 teaspoon vanilla (for the topping).
                      
                    
                      
                        14 - 
                        1 1/2 cups halved pecans.