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How to make alfredo sauce with cream cheese 
Melt the cream cheese and butter. 
Place 6 ounces (170 g) of cream cheese and 8 tablespoons (113 g) of butter in a medium saucepan. Turn the heat to medium and stir the butter and cream cheese until it melts and becomes smooth.
Whisk in the whipping cream. Slowly pour in 1 quart (946 ml) of heavy cream and increase the heat to medium high.