Nutritional yeast can sometimes leave a slightly flaky appearance in your gravy, but it won’t affect the texture once cooked and stirred in. Use an immersion blender to pulse the gravy a few times until smooth, keeping all the savory flavor without any visible flakes.
Important Note about Salt: Not all salts are made equal and cannot be substituted 1:1. If you are substituting table salt for kosher salt, you will need to cut the amount called for in the recipe by at least half.