Makesabout 6 cups
                    
                
                
                    
                        
                            - Active Time:5 min
- Start to Finish:10 min
 
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              January 2007
            
          
          
      
  
                
                
            
            
            
                Kombu comes packaged in dried lengths that are most easily cut with scissors.
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                                        - 
                                            6
                                            cups
                                            cold water
                                            
                                        
- 
                                            1
                                            oz
                                            (30 grams) kombu (dried kelp), about 20 square inches
                                            
                                        
- 
                                            2
                                            
                                            (5-gram) packages katsuo bushi (dried bonito flakes), about 1 cup
                                            
                                        
 
                    
                 
            
            
            
            
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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                                            Bring cold water and kombu just to a boil in a large saucepan over high heat. Remove from heat and remove kombu. Sprinkle katsuo bushi over liquid; let stand 3 minutes and, if necessary, stir to make katsuo bushi sink. Pour through a cheesecloth-lined sieve or a coffee filter into a bowl. 
 
                        
                    
                    Cooks' notes: If making stock for miso soup, it is not necessary to save the kombu or katsuo bushi. 
Stock keeps 4 days. Cool, uncovered, before chilling, covered.