Keeping nutritional yeast in the refrigerator, while helpful, isn't necessary. How you bought it, and how you store it, will help it from going bad.
Prue Leith's 2-Ingredient Hack Makes Store-Bought Stock Taste Homemade
We're all familiar with using store-bought stock, but sometimes the flavor falls short. Prue Leith has got you covered with a super simple trick.