How to make kefir sour? A guide to controlling the tang
                                
                                
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                                    4 min read                                
                            
                                Many commercial kefirs are milder and sweeter due to added sugars and thickeners, but a homemade batch can be much tangier and more complex. Knowing how to make kefir sour allows you to manipulate the fermentation process to create a drink with a distinct, robust flavor profile.