Make Oat Flour from Quick Oats: Fast Homemade Method

Learn how to make oat flour and quick oats from old-fashioned rolled oats and save money by doing the simple processing yourself. With a few basic tools you can turn pantry oats into a versatile, gluten free flour and a quicker-cooking oat for baking and breakfasts.

Why you should process your own oats

We start with lightly processed rolled oats—not whole oat groats. Turning rolled oats into quick oats or oat flour at home is straightforward, and it eliminates the need to buy multiple specialty flours. Quick oats are only a bit more processed than rolled oats, while oat flour is simply rolled oats ground to a fine powder.

Buying pre-processed quick oats or oat flour means paying for someone else to do work you can easily do yourself. Processing oats at home saves money, reduces pantry clutter, and gives you control over the texture: keep some oats whole for chew, process some lightly for quick oats, and grind some finely for oat flour.

Oats are excellent in baking for added texture and flavor. Having whole rolled oats, homemade quick oats, and oat flour on hand broadens what you can make—from chewy cookies and muffins to tender quick breads—without needing multiple purchased flours.

Raw oats are chewy

Unlike many other grains, rolled oats are pleasant to eat raw and remain chewy. If you’ve bitten into uncooked rice, you know how hard that can be—rolled oats are softer and more palatable raw, with a mild, slightly grassy flavor.

That natural chewiness is often desirable in baked goods, so you don’t have to grind oats to an ultra-fine consistency for many recipes. Slightly coarser oat flour or a mixture of oat flour and rolled oats can give baked items better texture and structure.

What equipment do we use to make oat flour and quick oats?

A grain mill can make superfine flours, but it’s not necessary for oat flour. For quick oats, a simple food processor works best; for oat flour, a blender does a clean, fast job. You don’t need fancy appliances—just a reliable blender or food processor and an airtight container for storage.

How to make quick oats from whole oats

Work in small batches and use a food processor to make quick oats without creating flour. Add rolled oats to the processor, pulse quickly two times, then shake the bowl to redistribute the oats. Pulse two more times and check the texture. Repeat short pulses as needed until the oats are broken into smaller pieces but not powdered.

No food processor?

If you don’t have a food processor, scatter rolled oats on a cutting board and roughly chop them with a sharp knife. This manual method produces a “sorta-quick” oat that will cook faster than whole rolled oats without turning to flour.

How to make oat flour from whole oats

To make oat flour, use a blender. Work in moderate batches: add rolled oats to the blender and process until they become a fine powder. Stop blending when the flour begins to clump together—this indicates a fine grind. Avoid overprocessing, which releases oils and makes the flour slightly sticky. If you’re unsure about leftover larger pieces, sift the flour and reprocess the coarse bits.

Only have a food processor, but no blender?

You can make oat flour in a food processor by processing longer, though you may end up with some larger fragments. Sift those out and process them again until the flour is uniform.

How to bake with oat flour and quick oats

If you need certified gluten free oats, look for oats that are grown, stored, and processed in dedicated gluten free facilities. Otherwise, store rolled oats in a cool, dry place and process them as needed for recipes. Homemade oat flour and quick oats are both excellent in a range of baked goods.

Can oat flour replace all-purpose flour? No—oat flour is a nutritious whole-grain flour with a lightly sweet, nutty flavor, but it doesn’t behave like all-purpose wheat flour. In gluten free baking, no single flour serves as a universal substitute. Oat flour excels in specific recipes like muffins, quick breads, cookies, and brownies, or combined with other flours and starches for structure.

Oat flour pairs beautifully with rolled oats in recipes that benefit from chew and tenderness. For example, peanut butter oatmeal chocolate chip cookies and oatmeal breakfast cookies use both oat flour and rolled oats to create chewy, satisfying textures without relying on complex flour blends.

You can also use ground oats for banana oat muffins, quick breads, and many everyday baked goods. Grinding oats before mixing can simplify cleanup when using a blender.