Yes, this cream sauce can be frozen without too much trouble. There is a chance it will separate--This is more likely to happen when the sauce cools or heats up too quickly. The easiest way to avoid a broken sauce is by allowing the sauce to cool slowly before freezing, then allowing it to thaw slowly overnight in the fridge. When reheating, microwave on 50% power or heat slowly over low heat in a skillet, stirring occasionally.