Why yeast extract is in tons of foods (and why it's delicious)
Why yeast extract is in tons of foods (and why it's delicious) is a medium British recipe that serves 4. 30 calories per serving. Recipe by Adam Ragusea on YouTube.
Prep: 15 min | Cook: 24 hrs 30 min | Total: 25 hrs
Cost: $9.15 total, $2.29 per serving
Ingredients
- 7 g Active Dry Bread Yeast (one standard packet; use organic if possible to avoid emulsifier)
- 500 ml Water (room temperature)
- 1 tsp Onion Powder (adds savory depth)
- 0.5 tsp Celery Seed (optional, mimics vegetable stock flavor)
- 0.25 tsp Salt (adjust to taste; optional if using salted butter on toast)
Instructions
Combine Yeast and Water
Place the 7 g packet of active dry yeast into the mixing bowl and add 500 ml of room‑temperature water. Stir gently until the yeast is fully dispersed.
Time: PT5M
Set Up Temperature‑Controlled Incubation
Wrap the bowl snugly with the heating pad, securing it with a kitchen towel or elastic band. Use the thermometer to monitor the liquid temperature and adjust the pad until it stabilizes at about 50 °C (122 °F).
Time: PT5M
Temperature: 50°C
Autolyse the Yeast
Maintain the mixture at 50 °C for 24 hours. During this time the yeast cells will undergo autolysis, releasing their umami‑rich contents into the water.
Time: PT24H
Temperature: 50°C
Separate Liquid from Solids
After 24 hours, pour the mixture through a fine mesh strainer (or cheesecloth) into a clean container, collecting the clear liquid (lysate). Discard or set aside the thick yeast sediment.
Time: PT5M
Reduce the Lysate
Transfer the collected liquid to a saucepan and bring to a gentle simmer over medium heat. Reduce until the volume is about one‑third of the original (approximately 15‑20 minutes), stirring occasionally.
Time: PT20M
Temperature: Medium heat
Season the Concentrate
Remove the saucepan from heat. Stir in 1 tsp onion powder, 0.5 tsp celery seed, and 0.25 tsp salt until fully dissolved.
Time: PT2M
Cool and Store
Allow the thickened extract to cool to room temperature, then transfer it to a clean jar with a tight‑fitting lid. Refrigerate for up to two weeks or freeze for longer storage.
Time: PT15M
Nutrition Facts
- Calories
- 30
- Protein
- 2 g
- Carbohydrates
- 4 g
- Fat
- 0 g
- Fiber
- 0 g
Dietary info: Vegan, Vegetarian, Gluten‑Free
Allergens: Yeast
Ingredient Substitutions
- Instead of Active Dry Bread Yeast: Nutritional yeast (different flavor), Brewer's yeast (bitter, requires debittering)
- Instead of Onion Powder: Granulated onion
- Instead of Celery Seed: Celery salt (reduce added salt), Ground celery
- Instead of Salt: Sea salt, Kosher salt
Equipment Needed
- Mixing Bowl
- Food‑grade Thermometer
- Heating Pad
- Fine Mesh Strainer (optional)
- Saucepan
- Jar with Lid
- Kitchen Scale (optional)
- Stirring Spoon
Critical Steps — Do Not Skip
- Maintaining a steady 50 °C temperature for the full 24‑hour autolysis period.
- Avoiding overheating during reduction to preserve delicate umami compounds.
Chef Tips from the Video
- Use organic, additive‑free yeast to avoid emulsifier interference with texture.
- A digital sous‑vide set to 50 °C provides the most reliable temperature for the 24‑hour autolysis.
- Add a tiny splash of soy sauce or miso during the seasoning step for an extra umami boost.
Troubleshooting
Temperature fell below 45 °C and autolysis stopped.
Wrap the bowl more tightly with the heating pad and check the pad’s power setting; consider using a sous‑vide water bath for precise control.
Extract tastes watery and lacks depth.
Extend the reduction step until the mixture reaches a paste‑like consistency, or repeat the reduction a second time.
Sediment remains in the final product, giving a gritty texture.
Strain the lysate a second time through a finer mesh or cheesecloth, or use a coffee filter for an extra clear extract.
Storage
Refrigerator: Up to 2 weeks in a sealed jar.
Freezer: Up to 3 months; thaw in refrigerator before use.
Room temperature: Not recommended; may spoil after a day.
Make-Ahead Tips
- The extract can be made in bulk and frozen in ice‑cube trays for convenient portioning.
- If the flavor is too mild, repeat the reduction step to concentrate further.
Frequently Asked Questions
What is the cultural significance and history of yeast extract like Marmite in British cuisine?
Marmite was created in 1902 by the German food scientist Justus von Liebig’s research on yeast autolysis. It became a staple British spread, prized for its intense umami flavor and high B‑vitamin content, and is traditionally enjoyed thinly on buttered toast.
What are the traditional regional variations of yeast extract in the United Kingdom and Australia?
In the UK the most famous brand is Marmite, while in Australia Vegemite is the counterpart, both made from yeast extracts but with slightly different seasoning blends; Vegemite tends to be saltier and less sweet than Marmite.
How is homemade yeast extract traditionally served in British households?
It is typically spread very thinly on buttered toast or crackers, sometimes paired with cheese. It can also be stirred into soups, stews, or used as a flavor base for gravies.
On what occasions or celebrations is yeast extract traditionally used in British culture?
Marmite is a common pantry staple for everyday meals, but it also appears on holiday breakfast tables and as a nostalgic comfort food during winter evenings.
What other British dishes pair well with homemade yeast extract?
It pairs nicely with full‑fat butter on toast, cheese scones, baked beans, and can enhance the flavor of shepherd’s pie, beef stew, or mushroom soup.
What are the authentic traditional ingredients for yeast extract versus acceptable substitutes?
Traditional yeast extract is made from spent brewer’s or baker’s yeast, water, and sometimes a pinch of salt. Acceptable home substitutes include active dry bread yeast (as used here) and organic yeast without emulsifiers; brewer’s yeast can be used but may need debittering.
What are the most common mistakes to avoid when making homemade yeast extract?
Common errors include letting the temperature drop below 45 °C, overheating during reduction, and failing to strain out the sediment, which can leave a gritty texture and weak flavor.
Why does this recipe use a 24‑hour, 50 °C incubation instead of boiling the yeast directly?
The low‑temperature autolysis allows enzymes inside the yeast cells to break down proteins into umami amino acids without denaturing them, creating a richer, more complex flavor than a quick boil would produce.
Can I make this homemade yeast extract ahead of time and how should I store it?
Yes, the extract can be made in advance. Store it in a sealed jar in the refrigerator for up to two weeks or freeze in portions for up to three months. Bring it to room temperature before spreading.
What texture and appearance should I look for when the yeast extract is finished?
The final product should be a thick, glossy brown paste, similar in consistency to a very thick soy sauce or a spreadable marmalade. It should be smooth, without large particles of yeast sediment.
How do I know when the yeast extract is done cooking?
When the reduced liquid has thickened to a paste that coats the back of a spoon and the flavor is intensely savory with a hint of bitterness, the extract is done. A quick taste test should reveal a deep umami profile.
What does the YouTube channel Adam Ragusea specialize in?
The YouTube channel Adam Ragusea focuses on science‑based cooking tutorials, exploring food chemistry, technique breakdowns, and practical recipes that help home cooks understand why recipes work.
How does the YouTube channel Adam Ragusea's approach to British food differ from other cooking channels?
Adam Ragusea combines rigorous scientific explanation with a casual, approachable style, often testing historical or industrial food processes (like yeast extract) and explaining the underlying chemistry, whereas many channels focus mainly on visual appeal or shortcuts.
Last updated: August 21, 2026
