Serves6 to 8 (breakfast or dessert)
                    
                
                
                    
                        
                            - Active time:15 min
 
                        
                            - Start to finish:50 min
 
                        
                    
                
             
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              April 2007
            
          
          
      
  
                
                
            
            
            
                This no-hassle mix-and-bake dessert is like the old-fashioned cake Grandma always had ready after dinner, even though you never saw her working on it. Browse nearly a dozen more rhubarb recipes in our slideshow. 
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            1/4
                                            cup
                                            water
                                            
                                        
 
                                    
                                        - 
                                            1 1/2
                                            teaspoons
                                            cornstarch
                                            
                                        
 
                                    
                                        - 
                                            1/3 cup plus 1/2
                                            cup
                                            sugar
                                            
                                        
 
                                    
                                        - 
                                            2
                                            cups
                                            chopped fresh rhubarb stalks (10 oz)
                                            
                                        
 
                                    
                                        - 
                                            1
                                            cup
                                            chopped fresh strawberries (5 oz)
                                            
                                        
 
                                    
                                        - 
                                            1
                                            cup
                                            all-purpose flour
                                            
                                        
 
                                    
                                        - 
                                            1 3/4
                                            teaspoons
                                            baking powder
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            teaspoon
                                            salt
                                            
                                        
 
                                    
                                        - 
                                            1
                                            
                                            large egg
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            cup
                                            whole milk
                                            
                                        
 
                                    
                                        - 
                                            1
                                            
                                            stick (1/2 cup) unsalted butter, melted and cooled slightly
                                            
                                        
 
                                    
                                        - 
                                            1
                                            teaspoon
                                            pure vanilla extract
                                            
                                        
 
                                    
                                
                            
                         
                    
                 
            
            
            
            
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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Put oven rack in middle position and preheat oven to 400°F. Butter an 8-inch square glass or ceramic baking dish.
                                         
                                    
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Stir together water, cornstarch, and 1/3 cup sugar in a small saucepan, then stir in rhubarb. Bring to a simmer, stirring constantly, then simmer, stirring occasionally, 3 minutes. Remove from heat and stir in strawberries.
                                         
                                    
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Whisk together flour, baking powder, salt, and remaining 1/2 cup sugar in a bowl.
                                         
                                    
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Whisk together egg, milk, butter, and vanilla in a large bowl, then whisk in flour mixture until just combined.
                                         
                                    
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Reserve 1/2 cup fruit mixture, then add remainder to baking dish and pour batter over it, spreading evenly. Drizzle reserved 1/2 cup fruit mixture over batter. Bake until a wooden pick inserted into center of cake portion comes out clean, 25 to 30 minutes. Cool in pan on a rack 5 minutes before serving.