Advantages of Using Milk in Bread Making

When it comes to producing consistently high-quality bread, the choice of ingredients matters far beyond flour, water, yeast, and salt. Skim milk powder (SMP) – also known as non-fat dry milk – is one of the most widely used dairy additions in both commercial and artisanal bread formulations. It quietly does a great deal of work: improving nutritional value, enhancing crust color, softening the crumb, and helping bakers maintain precise control over dough hydration. Understanding exactly what SMP contributes – and how to use it correctly – is essential for anyone serious about bread quality.

What is skim milk powder? 🔗

Skim milk powder is produced by removing both the water and fat from fresh milk, leaving behind a dry, shelf-stable powder. According to the Canadian Dairy Commission, SMP must contain no less than 95% milk solids, with moisture not exceeding 4% and fat not exceeding 1.5%. The result is a highly concentrated source of milk proteins, lactose, and minerals – without the perishability or variable composition of liquid milk. It can be stored for up to three years under cool, dry conditions, making it a practical and consistent ingredient for bakeries of any size.

Unlike liquid milk, SMP does not introduce extra moisture into the dough. This allows bakers to work with precise, stable hydration levels – a critical advantage in professional environments where even small shifts in water content can alter the final product. Because it is dry, it also disperses evenly during mixing, ensuring uniform distribution of its benefits throughout the dough.

Nutritional benefits of adding SMP to bread 🔗

Flour on its own lacks certain essential nutrients. One of the key reasons bakers add SMP to bread formulations is to close that nutritional gap. As noted by the U.S. Dairy Export Council, SMP is a concentrated source of high-quality protein – with amino acids that are readily digestible and completely bioavailable. It also delivers significant levels of calcium, phosphorus, and magnesium; just 100g of SMP contains approximately 1,300mg of calcium.

The Canadian Dairy Commission specifically highlights that SMP is commonly used in bakery products like breads, rolls, cakes, and doughnuts to add nutritive value – particularly because flour lacks some essential amino acids and minerals. For consumers, this means a loaf of bread enriched with SMP delivers more than just carbohydrates; it contributes to a more complete nutritional profile without requiring any reformulation of the core recipe.

How SMP improves dough and bread quality 🔗

Increased water absorption 🔗

One of the most functionally important effects of SMP in dough is its ability to increase water absorption. The Canadian Dairy Commission describes water binding as one of SMP’s key functional properties in baked goods. Milk proteins – particularly casein and whey – interact with water molecules and hold them within the dough structure, which directly affects dough consistency, handling, and yield. For commercial operations, higher water absorption also means improved output per batch, since the dough can accommodate more liquid while still maintaining the correct texture.

Research published in the Journal of Food Processing and Preservation confirms that SMP influences dough stability and water absorption in measurable ways, with improvements attributed in part to the presence of calcium in SMP, which strengthens gluten protein interactions and increases mixing stability.

Enhanced crust color 🔗

The golden-brown crust that makes bread visually appealing is largely a product of the Maillard reaction – a chemical process between sugars and proteins that occurs during baking. As explained by food production specialists at Lautan Natural Krimerindo, lactose – the primary sugar in milk – triggers this reaction, giving bread its attractive brown crust and richer flavor. What makes lactose particularly useful is that, unlike sucrose or glucose, it is not fermentable by yeast, so it remains available in the dough to caramelize fully during baking. The result is a consistently deeper, more uniform crust color without any adjustment to the fermentation process.

Improved flavor 🔗

SMP has a subtly rich, milky character that deepens the overall flavor profile of bread. Its neutral base enhances the inherent sweetness of a recipe without introducing any dominant or overpowering notes. When lactose caramelizes during baking, it produces not just color but also complex aromatic compounds that contribute to the finished loaf’s taste. Bread baked with SMP consistently scores better for flavor compared to bread made with water alone – a benefit that is particularly noticeable in enriched doughs like dinner rolls and sandwich loaves.

Greater loaf volume and better crumb structure 🔗

According to the open educational resource *Understanding Ingredients for the Canadian Baker*, milk in bread produces greater loaf volume through an improved capacity to retain gas, as well as a finer, more “cottony” grain. The proteins in SMP strengthen the gluten network and contribute to better gas retention during fermentation and oven spring. Milk also increases the gas retention properties of the dough, which can improve the rise of the bread in the oven – provided the dough is well developed. The outcome is a taller loaf with a softer, more uniform crumb and smaller, evenly distributed air pockets throughout the interior. The recommended usage level of SMP in fermented doughs is 2% to 8% based on flour weight, which is the range most consistently associated with these quality improvements.

The importance of preheating milk: the glutathione problem 🔗

Using milk in bread dough is not without its complications. Fresh liquid milk – including standard pasteurized milk – contains a compound called glutathione, a tripeptide that has a weakening effect on gluten. As baking specialist Gareth Busby explains, fresh milk, including pasteurised varieties, does not work well in bread dough because glutathione weakens the gluten and produces a heavier loaf.

Glutathione relaxes the gluten strands, making the dough slack, sticky, and weak. This prevents the dough from trapping the gas produced by yeast effectively, leading to a dense, heavy loaf with a poor rise. Research published in a peer-reviewed journal confirms that dough containing high concentrations of glutathione shows a significant reduction in fermentation height – in one study, by as much as 42% – along with poor gas retention capacity and a coarser crumb microstructure.

Scalding liquid milk 🔗

The solution for liquid milk is scalding – heating it to approximately 82°C (180°F) before use. Scalding denatures the glutathione, which is necessary when baking bread, and after this step the milk no longer poses any risk to gluten development. The milk must then be cooled to around 35-43°C (95-110°F) before being added to the dough; adding it while still hot will kill the yeast. Standard pasteurization (HTST, at 72°C) is not sufficient to deactivate glutathione – only UHT-processed milk, which reaches around 138°C, can skip this step.

Why SMP simplifies this process 🔗

This is one of the practical advantages that makes SMP the preferred choice in professional bakeries. Pro bakers use dried milk because it does not require scalding – provided the SMP has been manufactured using a high-heat process that denatures the problematic proteins during production. There is a specific type of dried milk available to professionals called “high-heat” dried milk, which has been heated to at least 180°F during manufacturing to deactivate glutathione. When using such SMP, the scalding step is entirely eliminated, saving time and reducing the risk of errors – a significant advantage in high-volume production where scalding hundreds of kilograms of milk is simply not practical.

Practical usage guidelines for SMP in bread formulations 🔗

Getting the most from SMP requires attention to quantity and preparation. The recommended amount of SMP in fermented dough is 2% to 8% based on flour weight. Exceeding this range without adjusting the formula can lead to diminishing returns – very high casein levels relative to flour weight have been shown to destabilize the dough and slow fermentation. When reconstituting SMP as a liquid milk substitute, the standard ratio is 1 part milk powder to 10 parts water by weight. It should be mixed thoroughly before adding to other ingredients to prevent lumps and ensure even hydration.

One notable advantage of SMP over liquid milk is the ability to “super-enrich” the dough with milk solids – adding more SMP than the equivalent of the liquid milk in the recipe – to amplify the effects that milk provides. When doing so, additional water must be incorporated to maintain proper dough consistency, typically at a ratio of around 1g of extra water per 1g of additional SMP.

Shelf life advantages 🔗

Beyond dough performance, SMP contributes to a longer shelf life in the finished loaf. Milk’s fat content contributes to a longer shelf life in bread; in the case of SMP, this effect is more modest since the fat has been removed, but the water-binding capacity of milk proteins still slows moisture loss and delays staling. SMP improves water binding capacity, allowing the bakery product to remain fresh for longer. For commercial bakers, this translates directly to a longer distribution window and reduced waste.

What do you think? Given that skim milk powder addresses both the nutritional limitations of flour and several key quality challenges in bread production, do you think it should be considered a standard ingredient in all enriched bread formulations – or should its use be limited to specific product types? And with the rise of plant-based alternatives, how do you see the role of dairy ingredients like SMP evolving in bread making over the next decade?

References

1. https://cdc-ccl.ca/en/node/798
2. https://chaltafarm.exportdepartment.ir/en/blog/skim-milk-powder-for-baking
3. https://www.thinkusadairy.org/products/milk-powders/health-and-nutrition
4. https://www.tandfonline.com/doi/full/10.1081/JFP-120015589
5. https://lautan-natural-krimerindo.com/articles/the-role-of-powdered-milk-in-food-production/
6. https://opentextbc.ca/ingredients/chapter/milk-in-bread-baking/
7. https://www.busbysbakery.com/is-milk-better-than-water-for-baking-bread/
8. https://www.breadbakingathome.com/post/using-dairy-products-in-bread-making
9. https://eathealthy365.com/the-secret-science-of-scalding-milk-for-baking/
10. https://www.sciencedirect.com/science/article/abs/pii/S0733521020307712
11. https://www.thefreshloaf.com/node/25719/milk-bread-making
12. https://www.chainbaker.com/milk-effects/
13. https://newsletter.wordloaf.org/lifestyles-of-the-enriched-and-famous-ee1/