You’ve just made your cheese or yogurt, and you have no idea what you can do with the leftover whey? Don’t throw it away! This yellow liquid is a real hidden gem, rich in protein, essential amino acids, and antioxidants (ref.).
In this article, we’ll guide you through 10 original ideas for using leftover whey wisely and preparing many tasty dishes!
Why Shouldn’t You Discard Whey?
Whey, or lactoserum, is much more than just a fermentation residue! It is a liquid rich in:
✅ High-quality proteins
✅ Minerals (calcium, phosphorus, potassium, etc.)
✅ Lactose (sugar) and essential amino acids
✅ Lactic acid bacteria
It promotes muscle growth, digestion, and even plant vitality! In short, there are many good reasons to use the whey left over from your fermentations.
Summary Table: What Can Whey Be Used For
This table summarizes the potential uses of whey.
⭐ = Requires a little more technique or time
⭐⭐ = Easy to do
⭐⭐⭐ = Very easy to do
| Usage | Quantity to use | Easiness |
|---|---|---|
| Smoothies & Beverages | Low | ⭐⭐⭐ |
| Pancakes & Cakes | Medium | ⭐⭐⭐ |
| Bread dough & Brioche | Medium | ⭐⭐⭐ |
| Risotto | Medium | ⭐⭐⭐ |
| Fermentation starter | Low | ⭐⭐⭐ |
| Sauces | Low | ⭐⭐ |
| Vinaigrette (dressing) | Low | ⭐⭐⭐ |
| Caramel | High | ⭐ |
| Homemade ricotta | High | ⭐ |
| Natural fertilizer | High | ⭐⭐⭐ |
How Can I Use Whey For? 10 Zero-Waste Ideas!
Here are 10 simple, tasty, and zero-waste recipe ideas using whey.
1. Make Your Own Ricotta
Heat the whey to 185°F (85°C) with a little lemon juice or vinegar. When ‘flakes’ appear, strain through a cheesecloth… and there you have it, creamy ricotta to spread or cook with!
💡 Expect to get about 1 cup (250 g) of ricotta for 20 cups (5 L) of whey — not a huge amount, yet so rewarding! 😅
Alternatively, you can also use the whey to make fromage blanc.
2. Boost Your Smoothies and Beverages
Add 2 tbsp. of whey per cup (250 ml) to enrich your smoothies with protein… and give them a tangy kick!
🍋 Use it just like lemon juice: for its fresh, natural acidity.
3. Softer Bread Dough and Brioche
Replace water or milk in your bread recipes with whey: it adds softness, flavour, and improves shelf life.
🥖 Replace up to 100% of the liquid for amazing results.
4. A Creamy and Original Risotto
Use whey instead of stock: you’ll get a creamy texture with a hint of acidity that makes all the difference.
🥛 Try our Fermented Squash Risotto Recipe!
5. Replace Milk in Pancakes and Cakes
For golden brown pancakes, lighter biscuits and a hint of caramel flavour, try whey instead of regular milk.
🎂 A real bonus for all your homemade baked goods! Try it in a yogurt cake.
6. Kickstart your Homemade Fermentations
Add 1 tbsp. of whey per 2 cups (500 ml) to your jars of vegetables or fruit juice: it acts as a starter culture to initiate fermentation.
⚠️ Avoid using it for pickles, unless you like them very soft.
🥬 Perfect for fizzy beverages or tasty fermented vegetables!
7. Deglaze Pans and Prepare Sauces
Instead of white wine, try whey: it adds depth, mild acidity… and zero alcohol.
8. An Original Salad Dressing
Its mild acidity makes it a perfect alternative to vinegar. Try it in your green or legume-based salads!
🫙 Try it in our dressing recipe or leek vinaigrette recipe!
9. A Sweet and Surprising Caramel
Reduce 16 cups (4 L) of whey with 2.5 cups of sugar (530 gr), 2 teaspoons of baking soda, and 2 tablespoons of corn starch.
🍯 The result: dulce de suero, a sweet caramel with a unique flavour.
10. A Natural Plant Fertilizer
Dilute it half and half with water and water your plants or vegetable garden: they’ll love this mineral cocktail.
To Keep in Mind
Is your whey cloudy or slightly fizzy? Not to worry, this is simply a sign of active, beneficial bacteria.
🚫 However, if it smells like rotten eggs or mold, it’s best to throw it away.
Whey can quickly become a valuable ally in your zero-waste kitchen. Try one of these ideas today — and rediscover its richness and versatility!
Get the Tools!
We suggest the following products for obtaining delicious whey.
