Makes about1 qt
                    
                
                
                    
                        
                            - Active time:10 min
 
                        
                            - Start to finish:4 hr
 
                        
                    
                
             
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              August 2009
            
          
          
      
  
                
                
            
            
            
                Americans have learned to appreciate plain whole-milk “Greek-style” yogurt in all its thick, rich, creamy glory, and those attributes are played up here. Buttermilk and lemon juice bolster its pleasing tartness, and light corn syrup adds body. 
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            1
                                            cup
                                            sugar
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            cup
                                            light corn syrup
                                            
                                        
 
                                    
                                        - 
                                            1/4
                                            cup
                                            water
                                            
                                        
 
                                    
                                        - 
                                            1/8
                                            teaspoon
                                            salt
                                            
                                        
 
                                    
                                        - 
                                            2
                                            cups
                                            plain whole-milk Greek-style yogurt
                                            
                                        
 
                                    
                                        - 
                                            1
                                            cup
                                            well-shaken buttermilk
                                            
                                        
 
                                    
                                        - 
                                            5
                                            teaspoons
                                            fresh lemon juice
                                            
                                        
 
                                    
                                
                            
                         
                    
                 
            
            
            
            
            
                
                    
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Equipment: 
                            
                            an ice cream maker
                         
                    
                
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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Warm sugar, corn syrup, water, and salt in a small saucepan over low heat, stirring, until sugar has dissolved. Transfer to a large bowl and cool to room temperature, stirring occasionally.
                                         
                                    
                                        - 
                                            
                                            
Whisk in yogurt, buttermilk, and lemon juice and chill until very cold, 3 to 6 hours.
                                         
                                    
                                        - 
                                            
                                            
Freeze yogurt in ice cream maker. Transfer to an airtight container and put in freezer to firm up.
                                         
                                    
                                
                             
                        
                    
                    Cooks’ note: Frozen yogurt keeps 1 week.