Why Put Whey in Bread? Exploring the Benefits

Whey is a liquid byproduct that is obtained during the cheese-making process. Incorporating whey into your bread recipes can provide numerous benefits, including enhanced flavor, improved texture, and increased nutritional value. In this article, we will examine the reasons why using whey in bread is a good idea.

Adding whey to bread yields several positive effects. Firstly, it enriches the bread with essential minerals such as calcium, magnesium, phosphorus, potassium, and zinc. Moreover, it contains lactose and lactic acid, which not only enhance the taste of the bread but also result in a nice brown crust color. 

Whey also plays a role in strengthening the gluten structure and enhancing yeast activity, resulting in bread dough that rises higher and achieves optimal texture.

The Benefits of Using Whey in Bread Baking

The utilization of whey in bread baking brings about several advantages. Firstly, it increases the mineral content, specifically magnesium, phosphorus, potassium, and zinc. Additionally, incorporating whey leads to elevated levels of lactose and lactic acid, resulting in improved crust color, sweetness, and bread flavor. Acid whey also imparts a mildly acidic taste reminiscent of sourdough.

Crust Browning

The presence of natural sugars in whey, aids in the browning process, yielding a nice golden-brown crust color. This addition enhances both the aroma and visual appeal of the final loaf.

Whole wheat bread slices on a cuttig board

Crumb Texture

Whey contributes to the creation of a softer crumb and a more tender and uniform texture. The proteins and acidity in whey assist in gluten development, enhancing dough structure and promoting a better rise.

Nutritional Value

Whey contains essential amino acids, which serve as the building blocks of protein. Amino acids such as leucine, valine, and isoleucine, found in whey, are particularly beneficial for muscle recovery and growth, making them highly sought after by athletes and fitness enthusiasts. They participate in protein synthesis, enhance muscle strength, and support overall muscle health.

Additionally, whey is rich in minerals such as calcium, potassium, zinc, phosphorus, and magnesium. Calcium strengthens bones and teeth, while potassium and magnesium aid in proper muscle and nerve function.


Prolonged Shelf Life

Furthermore, whey contains lactose, a natural sugar that helps retain moisture in baked goods. Lactose possesses hygroscopic properties, attracting and retaining water molecules. This assists in prolonging the freshness of the bread, keeping it moist for an extended period.

An article published by ScienceDirect.com explores alternative methods for bread preservation, specifically investigating the use of lactic acid bacteria fermented whey as a bio-preservative ingredient to inhibit the growth of certain fungi, thereby extending the bread’s shelf life.

Adding whey to sourdough bread

Tips on Adding Whey to Bread Dough

Both liquid whey and whey powder can be incorporated into bread dough to enhance its flavor, texture, and nutritional content.

One simple method is to replace the entire amount or a portion of the liquid, such as water or milk, in your bread recipe with an equal amount of liquid whey. I have frequently made bread using this method, resulting in a softer, better-shaped, and more flavorful loaf compared to simply adding water to the dough.

When using whey powder, it is typically added to the dry ingredients and can serve as a partial or complete substitute for milk powder. However, it is important to note that whey powder may not offer the same fat content as full-fat milk powder.

For optimal results, it is recommended to add approximately 5 percent of the amount of flour in whey powder to the bread dough, similar to the usage of milk powder.


What Is Whey and How Is It Produced?

There are two types of whey: sweet whey and acid whey, each with distinct production processes and compositions.

Sweet whey is produced as a byproduct of the cheese-making process, specifically when milk coagulates using rennet or microbial enzymes. It is the liquid that remains after the milk proteins (casein) have formed curds. Sweet whey has a mild, slightly sweet taste.

Sweet whey contains a relatively high amount of lactose (milk sugar) and whey proteins. It has a pH ranging from 5.9 to 6.6, making it slightly acidic.

Sweet whey is a common ingredient in the production of various food products, including infant formulas, protein powders, bakery goods, confectionery, and beverages.

Acid whey, on the other hand, is a byproduct of the manufacturing process of certain cultured dairy products like Greek yogurt, quark, or cottage cheese. These products are created by fermenting milk with specific strains of bacteria to lower the pH and induce coagulation. When the milk coagulates, the liquid that separates from the solid curds is known as acid whey.

Acid whey contains less lactose compared to sweet whey and is relatively high in lactic acid, resulting in its sour taste. It also contains whey proteins, albeit in lower concentrations than sweet whey. Acid whey has a lower pH, typically ranging from 4.0 to 4.6, making it more acidic.


In bakery products, acid whey can be utilized as a dough conditioner.

Whey Powder

Both sweet whey powder and acid whey powder have extended shelf lives, making them convenient for storage and transportation. They offer similar benefits to their liquid counterparts.

Whey powder is widely used as an ingredient in various food products. It serves as a source of lactose, whey proteins, and other nutrients, contributing to moisture retention, improved texture, and enhanced flavor in baked goods, confectionery, dairy products, and beverages.

Furthermore, whey powder finds application in protein powders and sports nutrition products due to its high protein content and favorable amino acid profile. It can also be utilized in animal feed formulations, providing livestock with a source of protein and essential nutrients.

Obtaining Liquid Whey at Home

To obtain whey at home, one method is by draining store-bought Greek yogurt or sour cream through a cheesecloth.

Another way to produce whey at home is by making cheese, which I have personally done numerous times. It’s important to note that this process requires access to fresh whole-fat milk as a starting point. Here’s a simplified step-by-step process:


Step 1: Curdling the Milk

Begin by heating the milk and adding a coagulant like lemon juice, vinegar, or a starter culture. As the milk acidifies and reaches a specific temperature, curds start to form.

Step 2: Straining the Curds

Once the curds have formed and separated from the whey, carefully strain the mixture using a cheesecloth. This allows the whey to drain away from the curds. Collect the liquid that drips through the cheesecloth into a container.

Step 3: Storing Whey

Whey can be stored in the refrigerator for approximately one week or in the freezer for up to six months.

Final Thoughts

Whey is a liquid that is produced during the cheese-making process, and it contains amino acids and essential minerals like calcium, magnesium, and potassium. Additionally, it adds lactose and lactic acid, which contribute to a pleasant taste and a desirable crust color in bread.

Whey also aids in the rising process, resulting in bread that rises higher and has a soft and tender texture. Moreover, whey helps extend the freshness of the bread, allowing it to stay enjoyable for a longer period.

Therefore, incorporating whey into your bread recipes can enhance the taste, texture, and nutritional value of your homemade bread.



My name is Debora, the founder of My Delicious Sweets, and a qualified confectioner with broad experience in the confectionery industry. On my blog, I will share important, interesting, and fun facts about food, along with some of my favorite recipes.

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