Step 3: Whisk Together the Creamy Sauce - Add the cream of chicken soup, chicken broth, heavy cream, and crushed red pepper flakes to the
saucepan. Whisk everything together until the mixture is smooth and creamy. It may seem a little loose at this stage, and that is exactly what you want. The sauce will thicken as the meatballs cook, and the Parmesan added near the end gives it even more body.