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
    Angela Stewart
    February 4, 2020 at 12:54 pm

    Since making the cider cake I’ve used half oat flour in several recipes. Currently have banana bread in the oven. Thanks for the tip!

    • Reply
      February 4, 2020 at 1:09 pm

      Banana bread with oat flour sounds amazing!

  • Reply
    September 18, 2019 at 4:20 am

    Just to confirm…if I were to replace all purpose flour with oat flour: 1 cup all purpose flour in a recipe should equal 1/4 cup oat flour to 3/4c all purpose four?

  • Reply
    Sherri H.
    September 2, 2019 at 5:59 pm

    Hi! I read that 1 1/2 c of oat flour replaces 1c of all purpose flour? Is oat flour keto friendly?

    • Reply
      September 2, 2019 at 6:18 pm

      Oats are lower in carbs than other grains, but I don’t believe they’re technically a part of the keto diet plan. I think oat fiber is preferred, which is mostly the non-digestible part of the grain, and contains little to no carbs.

  • Reply
    August 20, 2019 at 6:36 am

    Hi .
    Thanks for your blog. Now I know how to make oat flour! Do you have a good gluten free oat bread recipe you can share as well?

    • Reply
      August 20, 2019 at 6:44 am

      I don’t have an oat bread, but I’ll work on that for this fall Aliza. You might try one of my paleo breads, here.

  • Reply
    August 9, 2019 at 5:37 pm

    If I’m gluten intolerant, what other flours would you recommend to add to the oat flour since I can only use 25%-30% oat flour? I would like to start making my own gluten free breads.

  • Reply
    August 7, 2019 at 5:08 am

    What would a good ratio and combo be I want to try and make oatmeal cookies. Want to stay away from white flour I’m diabetic.

  • Reply
    February 17, 2019 at 12:54 am

    I tried to make Barley Flour in my processor but ended up finishing it in the Coffee grinder!! It was still a bit ‘gritty’ but was really lovely in the cookies I made. Will be trying the Oat flour soon. Good reading your post, thanks.

    • Reply
      February 17, 2019 at 5:57 am

      A Vitamix blender really helps with making your own flour Mary, I’ve used my processor and the results aren’t as fine. The oats are a lot easier to grind than barley, though, so you should have better luck with them.

  • Reply
    January 16, 2019 at 2:08 pm

    very informative post …. just curious, which wordpress theme you have used for your website?

    • Reply
      January 16, 2019 at 2:21 pm

      Thanks Angelina! I have a custom theme 🙂

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