Follow my easy tutorial on how to make oat flour at home in just 5 minutes using a blender or a food processor. You need just 1 ingredient (whole oats) to make oat flour (aka oatmeal flour) for use in all your favorite oat flour recipes.
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I find making oat flour at home easier than buying store-bought. First off, it is much less expensive. I only need to have oats on hand which saves cabinet space.
Oat flour has a slightly nutty flavor perfect for both sweet and savory baking applications. And while it is most often used in baked goods, I like to use leftover flour for breading or batters, like in my gluten-free chicken nuggets recipe.
What types of oats can be used to make oat flour?
Use old-fashioned oats, rolled or steel cut, to make oat flour. Do not use quick oats to make homemade oat flour. Your oats should be dry, fresh oats work best so check the best buy date on your packaging.
Remember that oats do not contain gluten but are often cross-contaminated. Only oat flour made from gluten-free certified oats is gluten-free.
⏲️How to Make Oat Flour
Oats can be made in a food processor or a high-speed blender, like a Vitamix. For small batches, less than a ¼ cup, you can just use a spice or coffee grinder.
Place 2 cups of whole oats into your processor.
Pulse the oats until they are ground into a fine flour consistency. This should take about 60 to 90 seconds.
Always stir to ensure that all the oats have been finely ground. Pulse until again, if needed.
💭Substituting Oat Flour in Recipes
- Do not substitute one for one. Replace no more than ¼ of the total flour with oat flour.
- If using oat flour in a gluten-containing (i.e. all-purpose or wheat) recipe that uses yeast, increase the yeast by 15%.
- When using oat flour in gluten-free baking add additional xanthan gum.
- When replacing oat flour with regular flour in recipes go by weight not volume. A small kitchen scale is helpful.
- Oat flour substitutes better in recipes that have a binder and fat, like eggs and oil.
- As will all gluten-free baking the batter needs to rest before using to allow the flour to hydrate a bit.
🍞Recipes Using Oat Flour
How Store Oat Flour
Oat flours do not last as long as regular flours due to the oils in the oats. Store the flour in an airtight container for up to 3 months.
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📖 Recipe Card
Homemade Oat Flour
Ingredients
- 2 cups old fashioned oats certified gluten-free, if needed
Instructions
- Place oats in a food processor (or a blender) and pulse the oats until they are ground into a powder-like consistency. This process should take about 60 to 90 seconds.2 cups old fashioned oats
- Stop and stir to ensure that all the oats have been finely ground. Pulse until again, if needed.
Video
Notes
- Scale up or down the recipe as needed
- Store extra flour in a labeled air-tight container for up to 3 months
- Recipe is gluten-free only when certified gluten-free oats are used
- Use whole or steel-cut oats. Quick-cooking or instant oats should not be used to make oat flour.
Melissa says
If a recipe calls for 2 cups of oat flour then you would use the 2 cups of rolled oats? 1 cup of rolled oats equals one cup of oat flour right?
Jen Wooster says
You will need about 2¾ cups of oats to make the 2 cups of oat flour.
im says
how much xanthan gum to add to 1 cup oat flour when using it as a replacement for regular flour?
Jen Wooster says
1/4 teaspoon
Christa says
This was a life saver! Thanks for the quick tutorial.