The Genius Ingredient for Perfect Gooey Cheese Saucewww.seriouseats.com Alka-Seltzer contains two key ingredients—baking soda and citric acid—that react to form sodium citrate, the emulsifying salt that is the secret to all processed cheese sauces. This recipe leverages that salt to give you the smoothest, creamiest cheese sauce in under 5 minutes.
