There are a few ways of thickening mushroom sauce:
1. Cornstarch/potato starch
2. Rice flour or any neutral flour
3. Lemon ( only works with soy cream)
4. Tapioca flour
Here are some of my favorite tips for thickening the sauces.
But keep in mind when using starches or flours, you will need to dissolve them in cold water before adding them to a sauce! This step is so important!
For example, you will need only 1 tsp of cornstarch combined with 1/2 cup of cold water or plant milk to thicken a sauce. Bring the sauce to a boil and remove from the heat. Now, your sauce should be thicker!
Don’t add cornstarch or flour right into the boiling sauce. It won’t dissolve, and you will have lumps of flour into the sauce! READ MORE
How Does Mushroom Sauce Thicken?
