Oat flour brownies are so rich and fudgy, no one will believe they are flourless and gluten-free! Oat brownies are an easy, five minute blender recipe made with oatmeal, peanut butter, and lots of gooey chocolate!
Fudgy brownies made with oats, no flour!
Make fudgy homemade brownies with this easy, oat brownie recipe! Naturally gluten-free brownies are made by processing oatmeal into homemade oat flour so no special or pricy ingredients are required.
Just like with this highly-reviewed oat flour bread or other easy oat flour recipes, after the flour is made, the remaining ingredients are added to the blender. This one bowl recipe means it is as simple as mix, pour and bake!
With a 5-minute, one bowl prep, you can’t beat the ease! Once you bit into these rich chocolate oatmeal brownies, you won’t they are made with no flour and only oats!
Since only 100% oats / oatmeal are needed, I typically have all the ingredients on hand to make these whenever the fancy strikes.
Whether you start with homemade oat flour or use your favorite store-bought brand, this recipe uses affordable, kitchen-staple basics like all the recipes in my gluten-free cookbook and those shared on the website.
- Oats – For gluten free brownies, be sure to use certified gluten free oatmeal. If you have oat flour, swap it out for the same amount of rolled oats called for.
- Unsweetened Cocoa Powder – I used regular baking cocoa, however if you use dutch-processed cocoa powder, you will have to replace the baking soda with an equal amount of baking powder.
- Peanut Butter – The peanut butter taste is almost undetectable, but it helps make the brownies ultra fudgy. Other nut butters may be substituted or use sunflower butter for a nut-free recipe
- Butter – You may use melted butter, coconut oil, or vegetable oil for dairy-free brownies. If using coconut oil, it will have a slight coconut flavoring.
- Chocolate Chips – Use dairy-free chips, such as Enjoy Life, or omit for a healthier brownie recipe.
How To Make oat flour brownies
(Below shows step-by-step photos and modified instructions. For the complete recipe, along with ingredient amounts, scroll down to the recipe card.)
Begin by blending the oatmeal into a fine powder using a high-powered blender. If you do not have a blender you can also use purchased oat flour and place it in a bowl.
Next, add the remaining ingredients to the blender, except the chocolate chips. Blend again into a thick batter. If making by hand, add ingredients and use a mixer to combine. Stir in the chocolate chips.
Spread the batter into a greased 8X8 inch pan. You may also line a pan with parchment pan for easier removal and cutting.
Sprinkle the remaining chocolate chips on top and then bake for 18-20 minutes. Cool for 30 minutes before slicing, or otherwise the brownies will break apart while enjoying!
using purchased oat flour
Simply replace the oatmeal with the same amount, 3/4 cup. The brownies would not have to be made in a blender or food processor, instead simply mix by hand or using a mixer.
Making without a blender
You may also make these brownies without a blender, but you would have to purchase oat flour. Add the dry ingredients to a bowl and whisk to combine. Add the remaining ingredients and mix by hand or with a mixer. Bake as directed.
Are these brownies healthy?
Brownies made with oat flour only do have less carbs than traditional brownies. To make them healthier, with no refined sugar, substitute your favorite sugar-free sweetener or pure maple syrup for the granulated sugar.
gluten-free dairy-free oatmeal brownies
Like almond flour brownies, using a naturally gluten-free flour, like oat flour, makes these brownies a gluten-free dessert recipe. However, be sure to use certified gluten-free oats or oat flour to keep them allergen safe.
To make the brownies dairy-free simply swap out the melted butter with coconut oil or vegetable oil. Replace the chocolate chips with a dairy-free brand.
Storing and freezing tips
This brownie recipe is best enjoyed within 1-2 days of making them. To store longer wrap the brownies securely and freeze up to 3 months in an airtight container.
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Fudgiest Oat Flour Brownies (Extra Easy)
- ¾ cup oat flour (same as ¾ cup rolled oats blended into oat flour)
- ¾ cup unsweetened cocoa powder
- ¾ cup granulated sugar
- ½ teaspoon baking soda
- ¼ teaspoon salt
- ½ cup unsalted butter, melted (or coconut oil for dairy-free)
- ½ cup creamy peanut butter
- 2 large eggs
- 2 tablespoons water
- 1 teaspoon vanilla extract
- 1 cup semisweet chocolate chips divided
- Preheat the oven to 350ºF. Grease a 8X8" baking pan using non-stick cooking spray. Set aside.
- Make the oat flour by placing ¾ cups rolled oats in a high-powered blender or a food processor. Blend the oats until it turns into a fine, powdery flour, about 30 seconds – 1 minute.¾ cup oat flour
- To the oat flour add the cocoa powder, sugar, baking soda, and salt. Process to combine.¾ cup unsweetened cocoa powder,¾ cup granulated sugar,½ teaspoon baking soda,¼ teaspoon salt
- Add the melted and cooled butter or oil, peanut butter, eggs, water, and vanilla. Mix to combine well. Stir in ¾ cup chocolate chips. The batter will be very thick.½ cup unsalted butter, melted,½ cup creamy peanut butter,2 large eggs,2 tablespoons water,1 teaspoon vanilla extract,1 cup semisweet chocolate chips
- Spread into the prepared pan. Sprinkle the remaining ¼ cup chocolate chips on top. Bake for 18-20 minutes, or until a toothpick inserted in the middle does not come out with wet batter. Cool for 30 minutes before slicing.
- DID YOU MAKE THIS RECIPE?? DON'T FORGET TO LEAVE FEEDBACK AND/OR CLICK A STAR RATING ON THE RECIPE CARD!
Using Purchased Oat FlourRather than make your own oat flour, you may use ready made oat flour. Be sure to purchase certified gluten-free oat flour to keep these oat flour brownies gluten-free! Simply replace the oatmeal with the same amount, 3/4 cup. The brownies would not have to be made in a blender or food processor, instead simply mix by hand or using an electric mixer.
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