How To Make Oat Flour

Homemade Oat flour in a glass jar with spoon

How to Make Oat Flour ~  simple instructions for making your own homemade naturally gluten free oat flour, it takes just seconds! Use it alone or in combination with other flours to give added flavor, a nutritional boost, and an extra tender crumb to your baking recipes.

a jar of homemade oat flour spilled on a wooden table

I’ve gotten a lot of questions about oat flour since I posted my Apple Cider Doughnut Cake, where I use oat flour in addition to all-purpose flour in the recipe. Many of you have never heard of oat flour, and don’t know where to find it. So let’s dive deep, you’ll be an expert by the end of the post ~

What is oat flour?

Oat flour is a whole grain flour made from oats. It’s naturally gluten free, and full of flavor and nutrition. Oat flour has a silky texture and a subtle ‘oaty’ flavor which I love. It is similar to wheat flour except that it doesn’t contain any gluten. It’s a very healthy product, with more protein and fiber than regular flour. It’s lower in carbs, too. Basically oat flour has all the nutritional benefits of oatmeal.

Where can I find oat flour?

You can buy oat flour in most large supermarkets, health food or specialty stores, and chains like Trader Joe’s. My favorite brands are Bob’s Red Mill and Arrowhead Mills, both of which you can find online as well. Look for it with the regular flour, or in the health food section of the market. If you’d like to buy it in bulk, just keep the unopened packages in the freezer.

Why do I use oat flour in some of my recipes?

I’ve discovered that a combination of regular all purpose flour with oat flour results in the perfect crumb and a lovely flavor, along with an extra nutrition boost from the whole grain oats. Oat flour generally adds moisure and a fluffier texture to recipes. I like to use it in cakes, shortbread, pancakes, cornbread, etc., and I love the result. I’ve listed out some of my favorite ways to use oat flour under the recipe card, below.

Homemade Oat flour in a glass jar with spoon

How to make your own flour from plain oats ~

If you’re interested, it’s super easy to make your own oat flour. You’ll need a food processor or a good blender, and oats, that’s it! You use raw oats, any type, and process for a few seconds until they turn into a fine powder. Voila ~ oat flour!

You can use a food processor like the Cuisinart, left…vitamix dry containerOr you can use a high speed blender like Vitamix, which is my choice for grinding flours because it pulverizes any grain in seconds and creates a super fine texture. Vitamix makes a special dry grains container for grinding ingredients like grains, or nuts, etc., above. If you’re going to invest in a Vitamix it’s smart to buy one that comes with this extra feature. You can also buy it separately.

rolled oats in a blender to be made into homemade oat flour

What kind of oats do I use to make flour?

Any type of oats will work for this. You can use oat groats (the whole oat kernel,) steel cut oats, or old fashioned rolled oats. You can even use quick cooking rolled oats, if that’s all you have, although that would be my last choice because they have been processed. In other words, you can make flour out of raw oats in any form.

What can I do with my homemade oat flour?

Your homemade oat flour can be used in all sorts of recipes from pancakes and waffles, to muffins and breads, to cakes and cookies. Many recipes are formulated for oat flour, but if a recipe calls for all purpose flour you can substitute oat flour for up to 25-30% the amount of regular flour in most baking recipes.  Oat flour can be used to thicken gravies, soups, and stews, too.

Homemade Oat Flour in a blender

How to store homemade oat flour

Whole grain flours spoil quicker than processed white flour, and so I like to keep mine in the refrigerator, or even freezer for longer periods of time. Store it in a zip lock baggie, a mason jar, or other airtight container. Since it’s so easy to make, I usually make small batches so it’s always fresh.


Homemade Oat flour in a glass jar with spoon
3.12 from 137 votes

How To Make Oat Flour

How to Make Oat Flour ~  simple instructions for making your own homemade naturally gluten free oat flour, it takes just seconds!   Use it alone or in combination with other flours to give added flavor, a nutritional boost, and an extra tender crumb to your baking recipes.
Course diy
Cuisine American
Prep Time 5 minutes
Total Time 1 minute
Author Sue Moran


  • 2 1/2 cups oats use steel cut or rolled


  • Put the oats in a food processor or high speed blender. Blend until the oats become a fine powder. This will only take a few seconds in a high speed blender, and a little bit longer in a food processor.
  • Store the oat flour in an airtight container in the refrigerator.

Cook's notes

1 1/4 cup oats will yield approximately 1 cup flour. If you are on a gluten free diet, make sure your oats are labeled gluten free.
The nutritional information for recipes on this site is provided as a courtesy and although tries to provide accurate nutritional information, these figures are only estimates.

Some of tvfgi recipes that use oat flour ~

How to Make Oat Flour ~ pin

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  • Reply
    Janet Bennett
    January 9, 2019 at 6:08 am

    My daughter cannot tolerate gluten. I’m on a mission to find a bread recipe that doesn’t use wheat flour. Can you help me on my mission?
    Enjoyed your article.

  • Reply
    September 24, 2018 at 4:50 am

    Have you ever used the oat flour in banana bread? You mentioned being able to partially substitute oat flour (OF) for all purpose flour. What’s in all purpose flour that prevents a total substitution?

    • Reply
      September 24, 2018 at 12:56 pm

      Regular flour has gluten, Karen, and that’s responsible for a lot of the structure of breads and cakes, etc. Oat flour alone would result in a cake or quick bread that would not hold together. You can definitely substitute some of the flour in the banana bread, though, and I think it would be delicious.

  • Reply
    Patricia Ellsworth
    September 20, 2018 at 9:49 am

    This is so interesting – I am going to make some Oat Flour and make your donut bundt cake. Thank you!

    • Reply
      September 20, 2018 at 11:20 am


  • Reply
    September 15, 2018 at 4:12 am

    How ‘fine’ of a powder should it be? Like AP flour or have a bit of texture? I have ground mine in my mini food processor, but I can’t seem to get it to a powder state. Still a bit grainy. Wondering if it will still be ok to use this way.

    • Reply
      September 15, 2018 at 7:08 am

      Your mini processor probably isn’t strong enough to get it to a fine grind, Tina, so just use it as is. A stronger motor will grind it finer, you can use the photos or video as a guide. Mine is not quite as fine as all purpose flour, I’d say it has the texture of a whole wheat flour, but yours will work.

  • Reply
    September 13, 2018 at 6:48 pm

    I’ve been warned by a friend with celiac that, while pure oats are indeed gluten-free, it’s really common for traces of wheat to sneak into oat products. If the oats you’re grinding aren’t specifically labeled as gluten-free, they’re probably not, and your flour won’t be, either.

    • Reply
      September 13, 2018 at 7:09 pm

      Good point Cassie, I’ll make a note of that in the post.

  • Reply
    Jennifer @ Seasons and Suppers
    September 13, 2018 at 5:08 am

    Love the idea of making my own oat flour! I love the flavour and extra goodness it brings to baking 🙂

  • Reply
    C zeller
    September 12, 2018 at 12:39 pm

    Is steel cut oats and whole old fashioned oats gluten free?

    • Reply
      September 12, 2018 at 12:40 pm

      They are gluten free.

  • Reply
    September 12, 2018 at 7:46 am

    I have been recommended to use oat flour where possible to control blood sugar levels and your extended list of uses is of great help; thank you Sue!

    • Reply
      September 12, 2018 at 8:28 am

      I’m glad this helps Alexandra, I’d like to start experimenting with recipes that use a higher percentage of oat flour, too.

  • Reply
    September 12, 2018 at 5:15 am

    Thanks so much for this great post Sue. I’m ready to start adding oat flour to everything 🙂

    • Reply
      September 12, 2018 at 8:29 am

      It really adds that indefinable something special, Tricia, I think you’ll love it.

  • Reply
    Chris Scheuer
    September 12, 2018 at 5:15 am

    Great post, so full of useful information. Thanks, Sue! I never thought of making my own oat flour. You are full of wonderful ideas!

    • Reply
      September 12, 2018 at 7:35 am

      I think you’ll get a kick out of making the flour, and with all the baking you do Chris I bet you’ll find all kinds of uses for it.

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