How to Make Oat Flour

By Rena Awada | Updated On January 25, 2024

Learn how to make oat flour at home in less than 5 minutes with this easy step-by-step tutorial. This healthy, gluten-free flour alternative is super versatile and can be used to make muffins, bread, desserts, and more.

White bowl with rolled oats on a cloth napkin.


When you learn the step-by-step process of making oat flour you’ll have a nutritious, whole-grain flour substitute to use in a variety of recipes including pancakes, brownies, cookies, and bread. It has a mildly sweet, nutty flavor, and creates a light and fluffy texture in baked goods. Plus, it’s naturally gluten-free when made with certified gluten-free oats.

While you can buy oat flour at the grocery store, it’s super easy and more affordable to make it at home in just minutes!

Why You should make oat flour from scratch

  • Easy to make: Making your oat flour is super simple and quick. It’s done with one ingredient in one simple step, you’ll just need a high-speed blender or food processor.
  • Healthy: Rolled oats offer lots of nutrition, they’re naturally gluten-free, filled with fiber, and have a good amount of plant-based protein.
  • Delicious: The flavor and texture of homemade baked goods that use oat flour is light and fluffy with a subtle nutty taste.
  • Versatile: Oat flour can be used to make so many recipes from muffins and breads to cookies and cake, and even savory recipes where you would use another type of flour.

Follow this guide to see exactly The process of making oat flour from scratch at home, plus tips, ways to use it, and common questions about using it.

What is Oat Flour?

Oat flour is a whole-grain flour made into fine flour or powder by grinding or blending whole-rolled oats. It is usually used as a gluten-free alternative to wheat flour in baking and cooking. It’s similar to whole wheat flour but since it can be naturally gluten-free is a great alternative to wheat or whole-grain flour in baking. Oat flour is rich in nutrients such as molybdenum, phosphorous, chromium, copper, biotin, vitamin B1, magnesium, and fiber.

side shot of a jar with oat flour in the jar and a lid on the right of the jar

Using oat flour in baking

Oat flour can be used in place of any flour when baking. It may not act exactly like all-purpose white flour and may also leave a nutty flavor, but it is a great healthier alternative in baking and it is also a good gluten-free alternative to using whole grain flour.

Ingredient needed

Making this oat flour recipe only requires one ingredient – oats!

The best types of oats to use when making homemade oat flour are old-fashioned rolled oats or quick-cooking oats so that it has the perfect light and fluffy consistency.

Steel-cut oats are much too hard and are likely to result in grittier oat flour that will not work as well in baked goods and other recipes. We like to purchase organic oats and be sure to choose certified gluten-free oats if you want to make gluten-free oat flour.

A white bowl with rolled oats on a wooden cutting board.

How to make oat flour

Here’s a step-by-step guide on making oat flour for baking using your blender or food processor:

  1. Add the oats: Place your rolled oats into a blender or food processor.
  2. Blend: To break the oats down, blend or pulse until the oats look like flour or a fine powder. This takes less than 1 minute.

Expert tips

  • Measuring oat flour: To be precise and for the best results for your recipe, once blended, measure the oat flour to what is needed to make the recipe.
  • Amount of rolled oats to oat flour: For 1 cup of oat flour, you will typically need to blend a bit more than 1 cup of rolled oats. Blend about 1 1/4 cup rolled oats to equal about 1 cup oat flour.
  • We highly recommend using rolled oats in place of quick-cooking oats.

Frequently asked questions

Is oat flour just ground-up oats?

Yes! There are no other ingredients in oat flour other than rolled oats.

Is it cheaper to make your own oat flour?

It is cheaper to make your oat flour at home rather than buying a bag of oat flour from the store. A 20-ounce bag of Bob’s Red Mill gluten-free oat flour is around 8 dollars and a 32-ounce bag of Bob’s Red Mill gluten-free rolled oats from Kroger is around 7 dollars. Pricing will vary depending on your store and brand.

Can I replace all-purpose flour with oat flour?

If you’re wondering how much oat flour equals regular flour in a recipe, keep in mind that oat flour has a different density and texture than other types of flour. For 1 cup of all-purpose flour, use 1 1/3 cup of oat flour. If the batter or dough is difficult to stir, add a bit more liquid.

Is homemade oat flour healthy?

Yes, according to Healthline, oats are incredibly nutritious and are loaded with important vitamins, minerals, and antioxidant plant compounds. They are also a good source of carbs, fiber, and protein, with a good balance of essential amino acids.

Oat flour in glass jars with the lid off.

Storage recommendations

Place homemade oat flour in an airtight container, and store at room temperature for up to 3 months.

Recipes using oats

Top view of oat flour in a glass jar with the lid off.

More how to guides

If you found this tutorial helpful, you may enjoy these other how-to guides:

Oat flour in glass jars with the lid off.

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side shot of oat flour in a jar with lid on the right side of it

How to Make Oat Flour

Learn how to make oat flour at home in less than 5 minutes with this easy step-by-step tutorial. This healthy, gluten-free flour alternative is super versatile, and can be used to make muffins, bread, desserts and more.
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Course: How To
Cuisine: American
Diet: Gluten Free, Vegan
Prep Time: 5 minutes
Cook Time: 0 minutes
Total Time: 5 minutes
Servings: 1 cup
Calories: 384kcal
Author: Rena

Ingredients

  • 1 1/4 cup rolled oats gluten free as desired

Instructions

  • Place rolled oats into a blender or food processor.
  • Blend or pulse until the oats look like flour or a fine powder.

Notes

  • Measuring: Measure out the amount needed of oat flour before adding to recipes. 1 1/4 cup rolled oats will equal 1 cup blended oat flour.
  • Storing: Store in an airtight container at room temperature for up to 3 months.

Nutrition

Serving: 1serving | Calories: 384kcal | Carbohydrates: 69g | Protein: 13g | Fat: 7g | Saturated Fat: 1g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 2g | Sodium: 6mg | Potassium: 367mg | Fiber: 10g | Sugar: 1g | Calcium: 53mg | Iron: 4mg
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