Heavy cream is liquid gold, around 36-40% butterfat. It whips into clouds and smooths into sauces like a dream. Cream cheese is a solid block of milk fat and protein, with far less water. That’s why you can’t just swap them cup for cup. You’d get a gluey mess, not a silky sauce. Sorry, science is a buzzkill.
But here’s the fun part: you can make a substitute, if you’re brave. The trick is to thin the cream cheese down. Warm it gently, then whisk in milk, water, or even a splash of the recipe’s liquid until it’s pourable. Does it taste exactly like heavy cream? No. Does it work in a pinch? Absolutely, for some things.