Oat Flour

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5 from 42 votes
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Learn how to make oat flour in less than a minute- you won’t need to buy store-bought! Using a bag of oatmeal, this oatmeal flour recipe is ready in 30 seconds.

homemade oat flour in a bowl.

Have you ever tried making oat flour? It can be used instead of white or wheat flour in many recipes.

We love making it because it comes in handy whenever we run out of other kinds of flour. I mean, considering I eat oatmeal almost daily, it’s safe to say we always have the one thing you need to make it.

Table of Contents
  1. Why I love using oat flour
  2. Key Ingredient
  3. How to make oat flour
  4. Arman’s recipe tips
  5. Storage instructions
  6. Frequently asked questions
  7. Recipes using oat flour
  8. Homemade Oat Flour (Recipe Card)

Why I love using oat flour

  • One ingredient. Just some oatmeal!
  • Cost-effective. A package of store-bought oat flour retails for close to $8. Making it using a 90-cent package of oats costs a fraction of that price. 
  • Wheat flour replacement. Instead of using white or wheat flour, try oat flour, and you’ll be surprised by its versatility. 
  • Healthy. Compared to wheat-based flour, the oat version has extra fiber, protein, vitamins, and minerals without even trying (source).

If you love making your own flour, try blanched almond flour, self-rising flour, and coconut flour next.

★★★★★ REVIEW

“I love making my own oat flour. It’s so much cheaper than the store-bought kind, and I use it in all my baking.” – Suzanne

Key Ingredient

  • Rolled oats. Old-fashioned oats, or gluten-free oats. You can use quick-cooking oats, but they lack the added texture. Remember that steel-cut oats will NOT work and will break your blender (we tried. RIP to that blender).

How to make oat flour

This is an overview with step-by-step photos. Full ingredients & instructions are in the recipe card below.

rolled oats in a blender.

Step 1- Add the oats to a high-speed blender or food processor.

blender with oat flour in it.

Step 2- Blend for 15 seconds until the oats are coarsely chopped. Blend once more until a fine, flour-like texture appears.

Arman’s recipe tips

  • Pause as you blend to scrape down the sides of the blender so you don’t accidentally end up with oat butter. 
  • It takes about 1 ½ cups of rolled oats to equal 1 cup of flour, so plan accordingly to ensure you make enough for your recipe.
  • I recommend using roughly 1 ¼ cups of oat flour for every 1 cup of all-purpose flour. 
  • Make self-rising oat flour by combining 1 cup of oat flour with 1 ½ teaspoons of baking powder and ¼ teaspoon of salt. 

Storage instructions

To store: Leftovers should be stored in a sealable container at room temperature. It will keep fresh for up to 6 months.

To freeze: Place flour in a ziplock bag and store in the freezer for up to 6 months. 

jar of homemade oat flour.

Frequently asked questions

Can you use this flour like regular flour?

If taste and texture aren’t an issue, you can technically swap out all-purpose flour for oat flour. The texture is where you will find trouble- oat flour can usually dry out baked goods more easily than all-purpose flour, so you may need to add some extra liquid to compensate. 

Is oat flour good for baking?

Compared to other flours, the oat version is a fantastic option for baking. It yields a more tender crumb and a heartier texture.

Recipes using oat flour

If you tried this Oat Flour Recipe or any other recipe on The Big Man’s World, please rate the recipe in the comments below. It really helps others thinking of making the recipe. 

oat flour recipe.

Homemade Oat Flour

5 from 42 votes
Learn how to make oat flour in 30 seconds! Made with just one ingredient, it's a fabulous replacement for wheat and white flour! Watch the video below to see how I make it in my kitchen!
Servings: 4 servings
Cook: 1 minute
Total: 1 minute

Video

Ingredients  

Instructions 

  • In a high-speed blender or food processor, add the rolled oats.
  • Blend for 15 seconds until oats are coarsely chopped. Blend once more until a fine, flour-like texture appears.
  • Transfer to a jar or sealable container.

Notes

TO STORE: Leftovers should be stored in a sealable container, at room temperature. It will keep fresh for up to 6 months.
TO FREEZE: Place flour in a ziplock bag and store in the freezer for up to 6 months. 

Nutrition

Serving: 1servingCalories: 192kcalCarbohydrates: 34gProtein: 7gFat: 3gSodium: 3mgPotassium: 183mgFiber: 5gCalcium: 26mgIron: 2mgNET CARBS: 29g
Course: Breakfast
Cuisine: American
Author: Arman Liew
Tried this recipe?Give us a shout at @thebigmansworld or tag #thebigmansworld!

Originally published April 2020, updated March 2024, updated May 2025.

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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Comments

  1. 5 stars
    Very tasty & I use it with Spelt & Artisan Bread flour, sifted together for my Sour dough & Biscoti/Cookies recipes.
    Delicious & satisfying!

  2. 5 stars
    I haven’t tried this but I am going to as I really need a low-carb flour and as you say everyone has this in their cupboard. thanks from England, UK

  3. Can I add 1/4 cup of oat fiber to reduce pure oatsand to add more fiber to lower carb count and get the same result?

      1. Hi Arman,
        Can steel cut oats be used instead of rolled oats? That’s just what I happen to have on hand in my pantry.

  4. So Can I use oat flour to make self rising gluten free flour then? Just add the baking powder and baking soda after I make my homemade oat flour ?