Malted wheat flour is wheat that has been allowed to sprout, then dried and ground into flour. That controlled sprouting process activates enzymes inside the grain that break down starch into sugars, fundamentally changing what the flour can do in baking. You’ll find it listed on ingredient labels for many commercial breads, bagels, and pizza doughs, where it helps yeast work more efficiently and gives crusts a richer color.
How Wheat Gets “Malted”
Malting is a three-step process: steeping, germination, and drying. Whole wheat kernels are soaked in water until they absorb enough moisture to begin sprouting. During germination, the seed produces enzymes, primarily amylases, that start converting the grain’s starch reserves into simpler sugars like maltose. This is the same biological process that would fuel a new plant’s growth, but maltsters interrupt it by drying the grain before the sprout develops further.
How that drying happens determines the type of malted flour you end up with, and the two types behave very differently in the kitchen.
Diastatic vs. Non-Diastatic: Why It Matters
The word “diastatic” refers to enzyme activity, and it’s the single most important distinction in malted flour.
- Diastatic malted wheat flour is dried at low temperatures to preserve its active enzymes. When added to dough, those enzymes continue breaking starch into sugar, feeding yeast and producing carbon dioxide throughout fermentation. The enzyme activity in malt flour can exceed 300 Ceralpha Units per gram, far beyond what standard wheat flour contains (typically under 5 CU/g). A little goes a long way.
- Non-diastatic malted wheat flour is kilned at temperatures above 160°C (320°F), which destroys the enzymes entirely. It has no starch-degrading capacity. Instead, it’s valued for the sugars already created during germination, which add sweetness, a malty flavor, and deeper crust color to baked goods.
Most commercial bread flour sold in grocery stores already contains a small amount of diastatic malted barley or wheat flour blended in. U.S. federal regulations allow malted wheat flour and malted barley flour to be added to standard flour specifically to compensate for natural enzyme deficiencies. The maximum for malted barley flour is capped at 0.75% of the total flour weight.
What It Does in Bread Dough
Plain wheat flour contains only small amounts of fermentable sugar. Yeast consumes those sugars quickly, and without a steady supply, fermentation slows down. The amylase enzymes in diastatic malted flour solve this problem by continuously breaking starch molecules into maltose that yeast can feed on. The result is steady carbon dioxide production, which means a more uniform rise and better oven spring.
Beyond gas production, these enzymes also decrease dough viscosity and consistency, making the dough more extensible and easier to shape. For bakers, this translates to bread with a more open, airy crumb structure and better volume.
Non-diastatic malt contributes differently. Because its enzymes are inactive, it doesn’t change how the dough ferments in a meaningful way. Its role is primarily sensory. The maltose sugars it carries into the dough survive fermentation and caramelize on the crust during baking, producing a deeper golden-brown color through the Maillard reaction. The flavor effect is subtle: a slight nuttiness at the end of each bite rather than an overpowering sweetness.
Nutritional Differences From Regular Flour
The sprouting process changes the nutritional profile of wheat in several measurable ways. Compared to unsprouted wheat flour, sprouted (malted) wheat flour shows higher levels of protein, dietary fiber, and ash content, which reflects overall mineral density. Protein digestibility also improves, meaning your body can access more of the protein that’s present.
Perhaps more significant is what decreases. Sprouting reduces phytates and tannins, two compounds classified as anti-nutrients because they bind to minerals like iron and zinc and prevent your body from absorbing them. Lower phytate levels mean the minerals already in the grain become more bioavailable. Research on wheat sprouted for 72 hours shows meaningful improvements in nutrient digestibility and antioxidant potential compared to unsprouted grain.
That said, malted wheat flour is typically used in small quantities (1-5% of total flour in a recipe), so the nutritional boost in any single loaf of bread is modest.
Where You’ll Find It
Malted wheat flour appears in more products than most people realize. Check the ingredient list on commercial sandwich bread, bagels, English muffins, pizza dough, and pretzels. It’s often listed simply as “malted wheat flour” or “malted barley flour.” Pretzel and bagel recipes rely on it heavily for their characteristic brown, slightly sweet crust.
Home bakers can buy both diastatic and non-diastatic malted flour from specialty baking suppliers. Diastatic malt is typically used at very low percentages (0.5-2% of flour weight) because too much enzyme activity will over-degrade the starch, turning dough sticky and producing a gummy crumb. Non-diastatic malt is more forgiving and can be used in slightly larger amounts for flavor and color.
Storage and Shelf Life
Malted wheat flour stores similarly to regular flour. Kept in a cool, dry place below 80°F with humidity under 70%, it holds for about one year from the date of manufacture. Diastatic malt flour deserves a bit more care because heat and moisture can degrade its enzyme activity over time. Storing it in an airtight container in a cool pantry, or even the refrigerator, helps preserve its effectiveness longer. Non-diastatic malt flour is more stable since there are no active enzymes to protect.