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You should also use high-quality cheese for your fancy cheese sauce, such as Pepper Jack, Gouda, or Gruyère.Citric acid, or sour salt, can be found in the kosher section of most grocery stores. If you can't find sodium citrate, you can use 2 teaspoons of citric acid (or sour salt) and 2.5 teaspoons of baking sodium as a substitute.You will only need a very small amount of sodium citrate in the sauce for it to do it’s job, so it is not upping the sodium level of your cheese sauce. It looks like salt and tastes salty and slightly sour.
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Instead, it helps to create a smooth, creamy texture to your cheese sauce. This means that when it is added to cheese sauce, it reduces the cheese’s acidity, makes the proteins in the cheese more soluble, and prevents it from separating. This recipe calls for sodium citrate, which is a type of salt that works as an emulsifier.
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