How To Make Oat Flour

If you've been wondering how to make oat flour, I'm sharing my 1 ingredient blender method so you can make it at home! In 5 minutes, you'll have it ready to bake! This DIY, homemade ingredient is so easy to make, incredibly versatile and will make you wonder why you ever bought it. You're going to love your new pantry staple: gluten-free, old-fashioned oats turned into flour. In just minutes, you can create a single-ingredient, nutritious, whole-grain blend with a mildly nutty flavor that gives a tender crumb and fluffy texture to all your baked goods.

From pancakes and waffles to cookies and muffins, this extra-soft, delicate flour makes your recipes thicker, evenly-mixed and downright fantastic. No gums, no fillers, just pure oat goodness that's light, vegan-friendly and surprisingly cost-effective. I actually love this simple, one-step process! Once you try it, you'll never buy it again. Blend, bake and savor this cheaper option. My homemade oat flour truly is a simple, fantastic and versatile game-changer for any home cook. If you like trying out pantry staples, check out this recipe for Hummus Without Tahini, this Sesame Free Hummus and my Low Histamine Ketchup.

Why You'll Love This Recipe

Make your own oat flour in just 2 minutes tops with one simple step, it's so quick and easy!

I love that I only need one ingredient to make this oat flour. It contain no gums, no fillers; just old-fashioned oats turned into a nutritious flour.

It's perfect for baked goods, pancakes, waffles, cookies, muffins and all my baking recipes! This oat flour is so versatile.

This oat flour has fluffy, tender results. It gives my baked recipes a light, extra-soft, delicate crumb that makes recipes thicker and evenly-mixed.

Gluten free and vegan, this flour is great for a gluten free diet and is 100% plant-based.

Cost-effective and DIY! It's so much cheaper than store-bought oat flour.

If you love making pantry staples from scratch, this is such a fun recipe.

Equipment Needed

All you'll need is a blender and a measuring cup to make this oat flour.

Ingredients Needed

Oats: I use Bob's Red Mill's Old Fashioned Rolled Oats in this recipe!

Step By Step Instructions

Step 1: Measure out the oats.

Step 2: Add your oats to the blender.

Step 3: Blend the oats until a fine powder is formed. 

Storage

Now that you know how to make oat flour, here's how to store it! Homemade oat flour is simple to store, but because it's made from whole oats that still contain natural oils, it can go rancid faster than store-bought flour.

Here's my suggestion based on my experience at home:

1. Short-term (up to 1 month): Keep it in an airtight container (like a glass jar or plastic container with a tight lid). Store in a cool, dark cupboard away from heat, light and moisture.

2. Long-term (up to 3-6 months): Store the flour in the fridge in an airtight container. This slows down oxidation and keeps the product fresh for longer.

3. Very long-term (6+ months): Freeze in a sealed freezer-safe bag or container. You can scoop out the amount you need without thawing the whole batch.

I like to label the container with the date I made it. Give it a quick sniff before using; if it smells off or slightly nutty/rancid, throw it out. Stirring or sifting before use can help break up clumps if the product has been stored for a while.

How To Serve 

Here's how I use my homemade oat flour:

• Baked into muffins and cupcakes. Also pancakes! Try them in my Pumpkin Banana Chocolate Chip Muffins.
• Oat flour can also be used to make savory foods like gluten free bread, pizza crust and more!

Recipe FAQ

How do you make oat flour? 

Simply grind rolled oats or quick oats in a high-speed blender, food processor or coffee grinder until you get a fine, powdery flour. Sift if you want a lighter texture.

Is oat flour just grinded up oats? 

Pretty much, yes! It's just oats blended to a smooth flour.

Is oat flour gluten free?

Yes, but the product must state that it's certified gluten free on the packaging!

Can I change all purpose flour to oat flour? 

Yes and no. Oat flour behaves differently than wheat flour because oats have no gluten. So, with baked goods, they tend to come out more dense and crumbly. You usually can't swap 1:1 without adjusting liquid, eggs or adding a binder like xanthan gum.

What can I use oat flour in?

I use oat flour in muffins like these Pumpkin Banana Chocolate Chip Muffins!

What kind of oats can be turned into flour? 

Rolled oats, old-fashioned oats or quick oats all work. Steel-cut oats can be ground too, but may need extra processing for a fine flour.

How much flour will my oats yield? 

Roughly 1 cup of oats makes about 3/4 cup of oat flour.

How long does oat flour last?

Stored in an airtight container, oat flour lasts up to 1 month at room temperature, 3-6 months in the fridge and 6+ months in the freezer.

Related Recipes

Be sure to try these pantry staple ideas next:

Nomato Sauce

Dairy Free Ranch Dressing

Low Histamine Salad Dressing

Homemade Nut Butter

Dairy Free Pumpkin Spice Creamer

If you make this DIY oat flour and love it, I would really appreciate a 5 star review! I also love seeing your creations so please tag me on Instagram or TikTok.