Learn How to Make Oat Flour at home with rolled oats or steel cut oats, and a blender or food processor. This easy homemade oat flour recipe can save your baking in a pinch.

If you cook with gluten-free flour on regular basis, here is quick tutorial how to make almond flour.

Oat flour in a measuring cup. Oats and scale nearby.

Today we will chat about how to make your own oat flour at home, as well as share recipes to use this versatile flour.

If you are here, chances are either you need a solution for gluten intolerance, oatmeal flour became a recent trend or you just happened to taste it and love it!

That’s what happened to me. I tested oat flour chocolate chip cookies and immediately fell in love with this whole grain flour.

What Is Oat Flour?

Oat flour is made from ground oats. That’s it, just one simple ingredient. Short and sweet.

It can be used in a variety of recipes, from sweet desserts to savory recipes. However, you need to keep in mind oatmeal flour doesn’t contain gluten, so it doesn’t behave exactly like all-purpose flour or whole wheat flour.

Types of Oats You Can Use

Now let’s look at kinds of oats you can use to make the flour:

  • Old fashioned oats or rolled oats – my preferred choice
  • Quick oats or quick-cooking oats or instant oats
  • Steel cut oats

Any of these oats can become an oat flour depending on the appliance you use to blend them. Keep on reading.

Rolled oats on a plate.

Is Oat Flour Gluten Free?

“Is oat flour gluten-free?” is a very good question. Naturally oats are whole grain that is gluten-free. However, very often oats are processed on the same equipment as wheat, that’s why they may contain traces of gluten.

To avoid cross contamination issues, if you are cooking for someone with Celiac disease or gluten intolerance, it is best to buy Certified gluten-free oats. Just read the package carefully and look for this label.

Or maybe making oat flour at home is the way to go for you. 100% gluten-free!

How to Make Oat Flour

Making your own homemade oat flour recipe requires 1 ingredient, a small kitchen appliance and 2 minutes of your time. Before you begin, you need to make sure you have the following tools:

Here is how to make oat flour in a food processor:

Whole old fashioned oats and then ground oats in a bowl of food processor with a blade.
  1. Add oats to a bowl of food processor with an S shape blade attachment.
  2. Process on high speed until finely ground oats appear, about 2 minutes.

Here is how to make oat flour in a high-speed blender:

Before you begin, I would like to mention that regular blender will not work to make oat flour. In that case, I recommend to use a food processor.

Whole oats and then oat flour in a blender jug.
  1. Add oats to the blender jug. I am using my Blendtec.
  2. Blend for 50 seconds, then shake ground oats in the jug, and blend for another 50 seconds.

You Must Sift It

Sifting your DIY oat flour is a must-do! If you do not, your cookies and pancakes will not turn out. Why? Because homemade ground oats contain small pieces of whole oats that do not absorb well. Therefore, you will end up with baked goods that are more floppy and runny, and recipes will fail.

Oat flour in a fine mesh sifter and then a bowl with oat flour and a sifter with oat flour

To sift oat flour, simply place it in a medium fine mesh sieve and sift above large bowl. Sift until no more flour is falling through the mesh, and you see fine powder is in the bowl and only larger pieces of whole oats are left in a strainer.

If your hands get tired, you can also rub ground oats with small rubber spatula on a mesh, while stirring.

You can either discard larger pieces of oats leftovers or add them to your overnight oats next time.

Vitamix Tip

If you have Vitamix, you may be able to skip the sifting step. I do suspect it is more powerful than Blendtec or Ninja. I have heard from a few Vitamix owners that they do not sift their ground oats.

How Much Do You Get?

A million dollar question is “How much oat flour does 1 cup of oats make?”. Before we talk whether it’s worth to make it at home, let’s talk about how much of it do you get.

Oats in a measuring cup on a kitchen scale showing 83 grams.

Old fashioned rolled oats:

  • 1 cup rolled oats weighs 3 ounces or 88 grams
  • 1 cup rolled oats yields 1 cup and 2 tablespoons of flour
  • 1 cup of oat flour weighs 2.8 ounces or 80 grams

Steel cut oats:

  • 1 cup steel cut oats weighs 5 ounces or 145 grams
  • 1 cup steel cut oats yields 1 1/2 cups of flour

Is It Cheaper to Make at Home?

So, is it worth it to make your own oatmeal flour at home vs. buying it at the grocery store or online? It depends how much do oats cost in your area or online at time of reading this post. Also depends how much free time you have to make, sift and store it.

Let do simple math with the most affordable flour and oats I found online today:

  • This oat flour costs $0.30 per ounce, or $0.90 per 1 cup (3 ounces)
  • These rolled oats cost $0.15 per ounce, or $0.45 per 1 cup (3 ounces).
  • You will need 1 cup of oats to make 1 cup of oat flour.
  • $0.90 ÷ $0.45 = 2. Therefore, it is twice cheaper to make grind your own oats into flour.

Can I Substitute Oat Flour for All-Purpose Flour?

Yes but with one rule in mind! You must substitute gluten-free oat flour for all-purpose flour by weight and not volume. It means, for example, if recipe calls for 1 cup of regular flour (scooped and leveled), you can’t use 1 cup of oatmeal flour instead.

Instead, know that 1 cup of all-purpose flour weighs 4.5 ounces or 120 grams. Get your kitchen scale out and weigh 120 grams of oat flour, which will be approximately 1 1/4 cups.

Substitution Tip

Substitute oat flour in recipes that call for white flour only if they contain eggs. Oat flour doesn’t contain gluten and eggs provide structure and “glue” to baked goods made with it. Even with eggs, baked goods made with oats flour are more delicate. Substituting with both white flour and flax eggs, can be also risky but possible. It depends on a recipe.

How to Store

Make a large batch of oat flour and store in an airtight container, well sealed bag or Tupperware in a cool dry place like pantry for up to 3 months. With such long shelf life it can become a pantry staple.

After that, I recommend to transfer it to a freezer and freeze for up to 6 months. Because whole grains contain natural oils, wholegrain flour doesn’t last as long as refined flour.

Favorite Recipes That Use Oat Flour

Oat flour has fluffy texture and mild flavor. I have used it in many baking recipes like cookies, waffles and quick breads with great results. Kids have never complained they can taste a difference, so I assume it passes the picky eater test.

Here are some of delicious oat flour recipes we managed to whip up so far.


Can you use a hand blender to blend oats?

No. Hand blender does not have sharp blades.

How to make flour without blender or food processor?

You can use a coffee grinder or spice grinder to make oat flour in small batches. However, there is a big chance it will have a coffee or spice smell. You can also try a mortar and pestle.

How much oat flour does 1 cup of oats make?

1 cup of rolled oats makes approximately 1 cup 2 tablespoons of flour.

Can you make oat flour from steel-cut oats?

Yes. You can use steel-cut oats to make flour only if you have a high-speed blender. It will not work in a food processor.

Side-by-side view of steel cut oats before grinding and after grinding in a high speed blender.
Oat flour in a measuring cup. Oats and scale nearby.

How to Make Oat Flour

Learn How to Make Oat Flour with oats, and a blender or food processor. Homemade oat flour recipe is 2 times cheaper than store-bought.
5 from 4 votes
Servings 1 cup
Calories 311
Diet Gluten Free
Prep Time 2 minutes
Total Time 2 minutes



  • Add 1 cup of oats into a high speed blender or food processor, close the lid and process for 2 minutes or until oat flour forms. If using a blender, pause and shake it once halfway through.
  • Then transfer ground oats into a medium size fine mesh sieve and sift over a large bowl only until small pieces of whole oats are left in the strainer. Discard them.
  • Transfer oat flour in an airtight container.


  • Store: Store in an airtight container, well sealed bag or Tupperware in a cool dark place like pantry for up to 3 months.
  • Freeze: Freeze for up to 6 months.
  • Steel cut oats: For this type of oats, I recommend to use only a high speed blender.


Serving: 1.12cups | Calories: 311kcal | Carbohydrates: 56g | Protein: 11g | Fat: 5g | Saturated Fat: 1g | Sodium: 5mg | Fiber: 8g | Sugar: 1g
Course: How To
Cuisine: North American
Author: Olena Osipov
Did you make this recipe?Mention @ifoodreal or tag #ifoodreal!

5 Secrets to Easy Healthy Dinners

Plus sign up for weekly emails with recipes to make your cooking stress free, delicious and healthy.

About Olena

Welcome! I grew up in Ukraine watching my grandma cook with simple ingredients. I have spent the last 11 years making it my mission to help you cook quick and easy meals for your family!

Pin this recipe now to save it for later

Pin Recipe

You may also like


  1. 5 stars
    Amazing! I felt like a homesteader making my own oat flour the other day. Then I made your protein waffles to have breakfast for dinner and everyone raved. It all turned out perfect.

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating

This site uses Akismet to reduce spam. Learn how your comment data is processed.