You can prepare demi-glace yourself at home or buy it in the store. For vegan substitutes, consider plant-based "creams" like soy or oat. Coconut milk also thickens the mushroom sauce, provided ...

Mushroom sauce – how to substitute cream and maintain a creamy ... To further enrich the sauce's flavor, consider adding demi-glace, an intensely reduced stock that enhances the sauce's bold ...