How to Make Oat Flour

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Did you know you can make your own oat flour for pennies on the dollar vs store bought? So many recipes now call for flours much different than the All-Purpose or Whole Wheat that we are used to.

how to make oat flour

Almond flour, rice flour and oat flour have become common among ingredient lists.  If these flours are not something you regularly use,  it can be pricey to buy a bag that you may only need for a small amount.

You don’t have to spend a lot of money because you already have everything you need in your pantry to make your own oat flour, simply and inexpensively.

While oats are naturally gluten free, they can be cross contained depending on where they were processed. If you are looking for certified gluten free oat flour, all you need to do is make sure the oats you purchase say “certified gluten free” and then you can make your own gluten-free oat flour at a fraction of the cost.

Need a delicious way to put this oat flour to use? Check out the Chief Mom’s Oatmeal Raisin Cookie Dough Bites. They are simple to make (no bake!) and perfect for a treat in the lunch box.

5.0 from 2 reviews
How to Make Oat Flour
Cuisine: How-To
  • 1 cup rolled or old fashion oats
  • Food Processor or high rpm blender
  1. Place the oats into the bowl of your food processor.
  2. Pulse the oats until they are ground into a powder-like consistency.
  3. Depending on the speed and power of your food processor, this process should take 60 seconds or less.
  4. Stop and stir to ensure that all the oats have been finely ground.
  5. One cup of rolled oats will yield approximately 1 cup of oat flour.
  6. Store unused portion in air tight container.


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  1. Hannah says

    Can you use a magic bullet for this? If so, which blade? There is a flat one and then one with prongs that stick up in the air.

  2. Cassie says

    Hi Elaine.

    Thank you for the great advise, however there is a huge error on your page, oats are absolutely NOT gluten-free. They along with Barley, Rye and Wheat are the main four gluten grains. Other grains include Kamut and Spelt.

    Please look into this as it could be potentially fatal for a coeliac.

    • Kaj says

      Certified gluten free oats DO NOT contain gluten. That is why they say very plainly on the package “certified gluten free”.

      People with celiac disease can be sensitive to oats even if the oats are certified gluten free. There is a certain protein in oats that can cause the same reaction in patients with celiac disease as gluten does, even if the oats are certified gluten free.

      The best thing to do is ask the person. If the food item is for a surprise, the prudent thing would be to avoid the oats so you don’t risk causing them undue problems.

    • says

      Cassie, certified GF oats do not contain gluten. They are, however, often cross contaminated in production facilities which is why if someone suffers from celiacs disease they should check the packaging.

  3. says

    I make and use oat flour for pancakes and waffles.

    Recipe :

    2 cups of oat flour, 2 eggs, tsp. baking powder, 1/2 tsp. cinnamon, 1 tsp. vanilla, buttermilk (you can use regular milk as we’ll) the amount of milk is between a pint and pint and a half. If making waffles at a tbsp. of melted butter. Add pecans, walnuts, blueberries or what ever your heart desires. I add ground flaxseed to mine as we’ll. You will never go back to boxed mix again. Almond milk will NOT brown pancake or waffle. Oh, I ground my own oatmeal. If you refrigerate, it will thicken. Just thin with any liquid. Eggnog is great too!

  4. joe says

    One cup of rolled oats will yield approximately LESS THAN 1 cup of oat flour.
    1 cup rolled oats = “approximately” 3/4-1 cup oat flour

    • Lori says

      I JUST made some lemon shortbread cookies with quick cooking oats turned into flour using my vitamix and they were DELICIOUS!!! Worked like a charm.

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