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How to Make Oat Flour

Here's a step-by-step guide on how to make oat flour using oats. You'll love just how easy and cost-effective it is!

Simple, Nutritious and Cost-Effective!

Oat flour is a nutritious whole-grain flour that’s easy to make out of—you guessed it—oats! It has a light texture, mild flavor and is a great gluten-free option.

Is oat flour good for you?

In short, YES! Oat flour offers a variety of health benefits that outweigh traditional flour.

  • Gluten-free: When made with certified gluten-free oats, it’s a great gluten-free alternative to wheat and white flour.
  • Lower glycemic index: Oat flour has a lower glycemic index compared to white or wheat flour, preventing insulin spikes and crashes in blood sugar.
  • Higher fiber content: Oat flour is rich in soluble fiber, which helps to slow down digestion, regulate blood sugar levels, promote healthy cholesterol levels, support digestive health and increase the presence of gut-friendly bacteria.
  • Increased satiety: Due to its high fiber content, oat flour can help you feel fuller for longer, potentially aiding in weight management by reducing the tendency to overeat.
  • Nutritious option: Oat flour retains the nutritional benefits of oats, including fiber, protein, vitamins and minerals.

Why make your own?

At our local grocery store, a 16-ounce package of organic oat flour costs around $8. Meanwhile, a 16-ounce package of organic oats costs $1.49. Not only is the price savings a great reason to make your own, but you can also control the texture and freshness.

  • Cost-effective: Making oat flour at home is more cost-effective than buying pre-packaged oat flour.
  • Quick preparation: Grinding oats into flour is a quick process that can be done in just a few minutes.
  • Free of additives and preservatives: By making oat flour at home, you can ensure that it’s free from any additives or preservatives.

What kind of recipes is oat flour used in?

You may be wondering what can you use oat flour for… the options are endless!

We personally love using it for baked goods including muffins, quick breads, cookies and brownies. You can also use it for savory recipes, like this Easy Egg Casserole, where flour is used as a thickener or binder.

What kind of oats should I use?

When making oat flour, use rolled oats or old-fashioned oats, rather than instant oats or steel-cut oats. Rolled oats have a finer texture than instant oats or steel-cut oats, making them easier to grind into flour.

What is the ratio of oats to oat flour?

If you are making the flour for a specific recipe, we would suggest using at least 1 & 1/4 cups of oats for 1 cup of oat flour. The flour takes up less volume than the whole oats, so remeasure after blending.

Is oat flour gluten-free?

If you make oat flour out of certified gluten-free oats (or buy certified gluten-free oat flour at the store), then yes, oat flour is gluten free.

Can oat flour be used as a substitute for other flours?

Oat flour may not work well as a 1:1 substitute for white or wheat flour in all recipes due to its different texture, lack of gluten and weight (it’s lighter than many other flours).

When using it as an alternative, replace the “regular” flour with an equal amount of oat flour by weight, not by volume. This is when a kitchen scale comes in really handy.

If baking with oat flour, let your batter rest for 10 minutes. This gives the oat flour time to hydrate and produces a better end result.

Lastly, if you’re going to substitute oat flour for a flour containing gluten, try to use a recipe that contains eggs. Eggs can replace many of the functions that gluten provides, such as binding and structure.

How do you make oat flour rise?

To help recipes made with oat flour rise properly you need to use some form of leavener, such as baking powder or baking soda. Using eggs also helps with binding and leavening in the absence of gluten.

Tips for Grinding Your Oats

  • High-speed blender, food processor or coffee grinder: A high-speed blender or food processor will yield the best results when grinding oats into flour. Make sure your appliance is capable of handling dry ingredients. You can also use a clean coffee grinder by adding a small amount of oats at a time and pulsing until you achieve a flour-like consistency.
  • Grind in small batches: To ensure even grinding, it’s best to grind oats in small batches. Overloading the blender or food processor may result in uneven texture or insufficient grinding.
  • Pulse instead of continuous grinding: Instead of running the blender or food processor continuously, use the pulse function. This allows for more control and prevents overheating the oats.
  • Sift for a finer texture (optional): If you prefer a smoother texture, you can sift the ground oat flour through a fine-mesh sieve or flour sifter. This helps remove any larger particles or bits of oats.
  • Experiment with blending times: If you prefer a coarser texture, you can blend the oats for a shorter duration. On the other hand, blending for longer will result in finer flour. Adjust the blending time based on your preference. This may take anywhere from 30 seconds to a couple of minutes.
  • Consider toasting the oats (optional): Toasting the oats lightly before grinding can enhance the flavor of the oat flour. Spread the oats on a baking sheet and toast them in the oven at 350°F (175°C) for about 10 minutes or until golden and fragrant. Allow them to cool before grinding.

What's the best way to store oat flour?

Use a labeled air-tight container or a large mason jar (our personal favorite) to store your flour.

Because whole grain flours contain good-for-you natural oils, they do not last as long as refined flours. Storing your oat flour in the fridge or freezer will provide ultimate freshness. The flour should stay fresh and last for about 3 months.

If you don’t have fridge or freezer space for your oat flour, transfer and store it in a cool, dry place.

Did you make this recipe?

If you make this Oat Flour, we would love to hear how it turned out! Leave a comment below sharing what recipe you used it in and what your family thought of it. We love hearing from you and your ideas inspire us all! Don’t forget to tag @fullforlifegal on Instagram so we can admire your masterpiece! 🌟

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How to Make Oat Flour

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  • Author: Kalie
  • Total Time: 2 minutes
  • Yield: 1 cup 1x


It’s so easy to make your own oat flour! The only things you need are oats and a food processor or blender. Here’s a step-by-step guide on how to make your own oat flour using oats.



1 & 1/4 cups old-fashioned rolled oats or quick oats


High-speed blender, food processor or coffee grinder


  1. Place the oats in a blender, food processor or clean coffee grinder. Pulse or blend until the oats are ground into a fine, flour-like consistency. You may need to pause and scrape down the sides of the container to ensure even grinding. Note: If using a coffee grinder, work with smaller quantities (about ½ cup) of oats at a time.
  2. Sift (optional): If you prefer a finer oat flour without any coarse bits, you can sift the ground oats through a fine-mesh sieve or flour sifter. This helps remove any larger pieces and creates a smoother texture.
  3. Transfer the freshly ground oat flour to an airtight container or storage jar. Label it with the date and use it within a few months for the best quality. Store it in the refrigerator or freezer or in a cool, dark place.


For a gluten-free option, use certified gluten-free oats.

Steel-cut oats can be used in place of rolled or quick oats but it will take much longer to grind into a flour-like consistency.

Helpful Tips

If the oats are spinning rather than catching the blade of the appliance, try adding more oats to increase the traction.

1 cup of oats will yield slightly less than 1 cup of oat flour.

  • Prep Time: 2 minutes

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Hi beautiFULL, We’re Pam & Kalie

Holistic Wellness Specialists and food freedom experts, here to dish out practical advice for a healthier life. Ready to savor real food, joyFULL movement, and a balanced mind-body connection? You're in the right place!

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