How to Make Oat Flour At Home

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by Alena Schowalter
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Skip the store and make oat flour at home! It takes 2 minutes and saves you money. 

Why oat flour? Oat flour is a healthy, fiber-rich alternative to white flour (bonus: it’s gluten-free with certified GF oats).

Homemade oat flour is much less expensive than buying it at the store. Plus, you get to pick the kind of oats you like! 

Whether you’re gluten-free or trying to eat more whole foods, oat flour is a great addition to your dishes! And if you ever run out, you can easily make more.

Making your own ingredients at home is fun, fulfilling, and gives you peace of mind! Try it out today.

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What is oat flour

Oat flour is simply ground oats! It’s a whole-grain flour packed with fiber and micronutrients. 

All you need is a high-speed blender to make it. You can use rolled oats or steel-cut — we’ll delve into the differences below.

How to make oat flour at home

Pour your oats into a high-speed blender and blend until they turn into a fine flour. Scrape down the sides if needed.

It’s that simple. 

In about one minute, you can have a whole container of oat flour ready to use. 

The minimum and maximum amount of oats you can blend is dependent on the size of your blender. However, one cup of oats is a good starting minimum! If you’re making oat flour in bulk, ensure that your blender isn’t overfilled, so the oats process evenly.


We recommend using a blender to make your oat flour, as the food processor does not finely grind the oats as much.

rolled oats in food processor
blending oats in food processor

How to make oat flour with rolled oats

Rolled oats transform into a light, soft flour similar to the texture of all-purpose flour. However, oat flour is slightly crumblier. Since rolled oats have a flattened shape, they blend easily.

As instructed above, place your rolled oats in the blender and blend until it becomes flour (about 50-60 seconds). 

How to make oat flour with steel-cut oats

Steel-cut oats take longer to blend, but they result in a higher fiber flour! They have a heartier texture than rolled oats (therefore creating a denser consistency). 

To make oat flour: add the steel-cut oats to your high-speed blender. Then blend for 45 seconds and scrape down the sides if needed. Continue blending until a powder-like texture forms. 

whole oats in a blender jar
making oat flour in blender

How to store oat flour

Store your oat flour in an airtight container. Place in a cool, dry area for up to 1-2 months (pantry or cabinet is best!) 

  • Fridge: Lasts up to 3 months.
  • Freezer: Lasts up to 6 months.

Since this oat flour contains one ingredient (and no preservatives) it has a shorter shelf life. But since it’s so versatile and delicious, you’ll use it all in no time!

Uses for oat flour

It’s time to celebrate — you can use oat flour in all your favorite baked goods! Oat flour is great in classics such as cookies, brownies, muffins, and more. 

Make sure to look for recipes that specifically call for oat flour! It is not a 1:1 replacement for all-purpose flour, given the different density.

Below are some of our favorite recipes using oat flour:


Can you make oat flour in a food processor?

If you don’t have a blender, that’s okay — a food processor will work. However, you have to process the oats longer, and the texture will be less fine.

For steel-cut oats, we recommend solely using a blender. Steel-cut oats have a tough outer shell, which can be difficult to blend into a fine flour with a food processor.

What types of oats are there?

There are six types of oats (but not all can be used to make flour):

  • Oat Groats — Whole grain oat seed (husk removed). It takes the longest to cook.
  • Steel Cut — Smaller cut pieces of oat groats.
  • Rolled/Old-Fashioned — Steamed and rolled. The flatter pieces are quicker to cook than steel cut.
  • Quick Cook — Rolled oats that are flatter and cut into smaller pieces.
  • Instant — Pre-cooked and dehydrated oats. These cook faster than quick-cook oats and are occasionally flavored. They are not recommended for baking recipes.
  • Oat Bran — Outer shell of the oat seed, underneath the husk. They have a smoother texture than rolled oats.
different types of oats in bowls

Is oat flour gluten-free?

Yes, as long as the oat flour is made with certified gluten-free oats!

Oats are considered naturally gluten-free in several countries. However, there is a possibility of cross-contact during the production process.

The best route is to find certified gluten-free oats to make homemade oat flour (or you can find certified gluten-free oat flour at the store).

Is oat flour healthy?

Oats, and consequently oat flour, have wonderful nutritional benefits.

The National Library of Medicine states they are high in dietary fiber with a balanced amino acid profile. They’re a great carbohydrate source that’s high in protein.

Plus, oats contain essential micronutrients such as vitamin E, zinc, iron, magnesium, copper, and selenium.

Oats are not only delicious and versatile, but they’re nutritious too!

several jars of oat flour on a table

Can you freeze oat flour?

Yes! Place in an airtight container or resealable bag for up to 6 months. Let thaw before use.

How much oat flour equals regular flour?

1 cup of oat flour is approximately 1 ⅓ cup all-purpose.

If you want the most accurate ratio, you can weigh the two flours

Here are the steps:

  1. Place an empty bowl on a food scale (tare the scale after you place the bowl)
  2. Set the scale to grams
  3. Measure 1 cup of regular flour
  4. Pour the flour into the bowl
  5. Record the weight

Hypothetically, let’s say your 1 cup of regular flour = 120 g. That means 120 g of oat flour = 1 cup of regular flour. Easy, right?

Substituting with weight will yield accurate results, so follow weight measurements when you can!

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Homemade Oat Flour

by Alena Schowalter
Prep Time 2 minutes
Total Time 2 minutes
Wondering how to make oat flour at home? This quick and easy guide answers all of your questions. Homemade oat flour can save you money and time!
Serves 4


  • 2 cups oats rolled or steel-cut


  • Measure how many oats you need to make enough flour. Don’t use too little!
  • Place old-fashioned rolled oats or steel-cut oats into a blender (a food processor can be used for rolled oats. It’s not recommended for steel-cut).
  • Blend or pulse until you are left with a powdery flour. This will take about 1 minute, depending on the amount of oats used and how powerful your appliance is.
  • Don’t over-blend! If needed, stop and mix the oats with a spoon so they are ground evenly.
  • Use your homemade oat flour in any baking recipe. Store any leftovers in a cool, dry, and dark place in a sealed jar or container.


  • Make sure to use at least one cup of oats when making your own flour.
  • Find lots of tips in the article above!
Course: Basics
Cuisine: American
Nutrition Facts
Homemade Oat Flour
Amount per Serving
% Daily Value*
Saturated Fat
* Percent Daily Values are based on a 2000 calorie diet.
Nutrition information is a rough estimate calculated automatically, their accuracy is not guaranteed.
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Hi, I'm Alena Schowalter — a Certified Vegan Nutritionist who has been a vegetarian since childhood and vegan since 2012. Together with my husband, I founded nutriciously in 2015 and have been guiding thousands of people through different transition stages toward a healthy plant-based diet. I enjoy discussions around vegan ethics, walks through nature, and creating new recipes. Read more about us here.

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