Below is a recipe I've been using for a while now that I lifted from this old reddit thread. I've found it works great as an addition to most soups, sauces or gravies either alone or as a flavor booster (honestly, nutritional yeast by itself will do that to a large extent and is seriously underutilized).
Blend all ingredients to a powder. Dissolve 2 teaspoons per cup of boiling water, then adjust ingredients and ratios to taste. Poultry Seasoning can also be a good addition. Store in an airtight container.
*I'm not a fan of paprika, because it always seems to disappear when combined with other ingredients. Old Bay, on the other hand, complements whatever it's added to without overpowering.