Nutritional Yeast

What it is

Deactivated (non-living) yeast sold as pale-gold flakes or powder, with a savory, cheesy character. Affectionately nicknamed "nooch."

How it's made

Saccharomyces cerevisiae (the same species as baking/brewing yeast) is grown on a sugar-rich medium (often molasses), then harvested, washed, heat-deactivated (so it no longer leavens or ferments), and dried into flakes. Many brands are fortified with B-vitamins, notably B12.

Flavor profile

Savory, nutty, and distinctly cheesy with umami depth (from its natural glutamates), plus a faint earthy-yeasty note. Pleasant and moreish.

Culinary uses

The cornerstone of vegan "cheesy" flavor: stirred into sauces (vegan mac and cheese, cashew cheese), sprinkled on popcorn, pasta, and roasted vegetables like parmesan, and used to add savory depth to soups, tofu scrambles, and dressings. Its glutamate content lets it stand in for the umami of aged cheese in plant-based cooking — a role little else fills as conveniently.

Regional variations

A modern Western health-food and vegan staple rather than a traditional ethnic ingredient; fortified vs. unfortified versions, and "savory" vs. larger-flake forms, are the main distinctions.

Cultural & historical context

Nutritional yeast rose with vegetarian, vegan, and macrobiotic movements in the later 20th century as a nutrient-dense, B12-fortified seasoning, and became iconic in plant-based cooking.

Reference notes

• Tags: umami, yeast, vegan, cheesy, fortified-B12, flavor-base
• Related ingredients: MSG, yeast extract, tomato paste, dried mushroom powder
• Related cuisines: vegan, vegetarian, modern Western health-food
• Suggested Cuisinopedia links: Umami, Yeast Extract, Vegan Cheese