How to Make Oat Flour

Making homemade oat flour is a great way to incorporate whole grains into your gluten-free baking! Learn how to make this easy-to-follow recipe from the comfort of your own home. With only one ingredient, oats, you can enjoy freshly made oatmeal flour at at any time.

A wooden spoon sits in a bowl of oat flour. There is a bowl of oats in the background.

I love making my own ingredients at home, such as cashew milk, pecan milk, and more. It’s affordable and saves on single-use plastics.

The same is true for this recipe. Once you learn how to use oatmeal flour you’ll love having the easy, delicious, and nutritious treats you can make with it.

Besides, oats are nutritious! Whether you’re eating chocolate overnight oats or blueberry oat bars, oatmeal is a heart-healthy ingredient to include in your diet!

Get creative in your kitchen and see the difference ground oats flour can make with your baking. With these tips, tricks, and oatmeal recipe ideas, you’ll be an oatmeal flour master in no time.

How to Make Oat Flour

Sure, you can buy ground oats flour at the store, but you can also make it yourself at home. Try both and see which you prefer!

You can find the full printable recipe, including ingredient quantities, below. But first, here are some explanations of ingredients and steps to help you make this recipe perfect every time.

  1. Place oats in a food processor or blender.
  2. Cover and pulse on low until the oats are mostly broken down.
  3. Use a spatula to stir the oats.
  4. Cover and pulse, gradually increasing the speed.
  5. Repeat this process until you achieve the desired texture.

To achieve a fine flour, you’ll need a high-speed blender. Other blenders will work, but you may not be able to achieve a finely-milled flour product.

Key Ingredients

You’ll need oats for this recipe, and that’s it. But the quantity does matter.

The minimum amount of oats you can use in a blender or food processor is one cup, but 2 cups will work even better.

A bowl is full of old-fashioned oats, waiting to be cooked.

What type of oats is best for making flour?

I find old-fashioned or rolled oats are best for grinding oats into flour. You can also use instant oats, which have been processed a bit more, and has a finer grain.

Oat Flour Conversion

It’s good to know how much oats you’ll need for use in your recipes.

  • Add 1 cup + 3 tablespoons of rolled oats to a blender to process into 1 cup of oats flour.
  • If you add 2 cups of rolled oats to a blender, it will create approximately 1 3/4 cups of oatmeal flour.
  • When baking with flour from oatmeal: for every 1 cup of all-purpose flour called for in a recipe, substitute 1 1/3 cups of ground oats flour. Assess your batter. If it seems too stiff, you can add a bit more liquid.

Storage Tips

Store flour from oats in an airtight container. It will keep in the pantry for up to 2 months, but it can go stale, so I prefer to refrigerate it. You can store it n the fridge or freezer for up to 6 months.

Using Oatmeal Flour in Gluten-free Baking

Is oat flour gluten-free? It’s an important question when you’re baking gluten-free. Some oats are milled on the same equipment as other grains.

Be sure to look for oats or flour from oats that are labeled gluten-free. This guarantees that the flour is free of any traces of other grains and is safe for those who are celiac or have sensitivity to gluten.

Ground oats makes a great addition to most gluten-free baking recipes because it adds a whole grain nutritional boost without the strong taste of some gluten-free flours.

Additionally, it can help with binding dough together and adds subtle sweetness to the finished product. It’s a versatile flour that has many baking uses.

Oat Flour Recipes

If you’re ready to try out some recipes that use oatmeal flour, here are some favorites:

A wooden spoon sits in a bowl of oat flour. There is a bowl of oats in the background.

Oatmeal Flour

No more looking in vain for the ultimate gluten-free baking ingredient! oatmeal flour is here, becoming a go-to for baking healthier treats. This tasty flour is versatile, affordable, and easy to incorporate into everyday recipes.
5 from 1 vote
Course: Ingredients
Cuisine: American
Prep Time: 1 minute
Cook Time: 1 minute
Total Time: 2 minutes
Servings: 4 servings
Calories: 77kcal


  • 1 cup oats (rolled or instant) See notes for using steel cut oats.


  • Food Processor Method: Add oats to a food processor and pulse in short bursts until the oats are broken down into smaller bits. Use a rubber spatula to remove any oat bits on the side or bottom of the bowl.
  • Repeat processing until a flour texture is achieved. This may take several minutes using a food processor.
  • Blender Method: Add oats to a blender jar and pulse in short bursts until the oats are broken down into smaller bits. Use a rubber spatula to remove oat bits on the side or bottom of the jar.
    Oats are in the bottom of a blender jar.
  • Repeat processing until a flour mixture is achieved. This will take longer for steel-cut oats.
    Blended oat flour is in the bottom of a blender jar, having recently been blended.
  • Store oat flour in an airtight container. It will keep at room temperature for up to 2 months or in the fridge for up to 3 months. Oat flour can be frozen in freezer-safe containers for up to 6 months.

Recommended Equipment

(The products above contain sponsored links to products we use and recommend)


Use a high-speed blender to process steel-cut oats. Because these oats are more fibrous, it will take longer processing time and will produce more flour.
Calories: 77kcal | Carbohydrates: 14g | Protein: 3g | Fat: 1g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Sodium: 1mg | Potassium: 73mg | Fiber: 2g | Sugar: 1g | Calcium: 11mg | Iron: 1mg

The nutrition information shown is an estimate provided by an online nutrition calculator and should not be considered a substitute for a professional nutritionist’s advice.

Rate / Comment

Your email address will not be published.

Recipe Rating

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