Don't discard the porcini soaking liquid! It's packed with umami flavor and adds a wonderful depth to the sauce. Strain it carefully to remove any sediment. For a richer sauce, consider adding a tablespoon of mascarpone cheese at the end of the cooking process. If you don't have dry white wine, you can substitute chicken broth or vegetable broth, but the wine adds a distinctive flavor that complements the mushrooms beautifully. Adjust the amount of heavy cream to your liking. For a lighter sauce, use half-and-half or milk, but be aware that the sauce will be less rich and may not thicken as much. Fresh herbs like thyme or rosemary can also be added to the sauce for a different flavor profile.