Mozzarella comes in a bag or pot surrounded by whey or brine. I’ve included the mozzarella itself in today’s recipe, but it is entirely optional and could easily be saved for another recipe. Mozzarella whey muffinsWant to save this recipe? Explore your own combinations of optional extras: I adapted this recipe from one of my early Guardian recipes for celeriac and blue cheese muffins, which is another lovely combination. In a large bowl (or plastic tub for which you have a lid), combine the flour, baking powder, beaten egg and mozzarella whey.