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!
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
If using a blender to mix together, add the cocoa powder, sugar, baking soda, and salt to the oat flour. Process to combine. If mixing by hand, transfer the oat flour to a bowl and add remaining dry ingredients.
½ cup unsweetened cocoa powder, ½ cup granulated sugar, ½ teaspoon baking soda, ¼ teaspoon salt
Add the melted and cooled butter or oil, peanut butter, honey, eggs, water, and vanilla to the blender or bowl. Process or stir to combine well, scraping down the blender halfway through. Stir in ¾ cup chocolate chips.
½ cup unsalted butter, melted, ½ cup creamy peanut butter, ¼ cup honey, 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 20-25minutes, or until the edges are puffed and set, and a toothpick is slightly moist when inserted in the middle. It's better to slighlty underbake. Cool for 30 minutes before slicing.
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Notes
Updated recipe (02/2024)
I slightly changed the recipe to include a larger ratio of wet to dry ingredients to help with binding and moistness. Since the brownies are made with oat flour, they will naturally be a little more "cakey" than traditional brownies. Also, oat flour recipes do have a tendency to break apart a little more because there's no gluten or anything to replicate that, like xanthan gum. If desired, you could add 1/2 tsp xanthan gum to the dry ingredients.
Using Purchased Oat Flour
Rather 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.