Nbirz

Plant-based, gluten-free cooking.

4-Ingredient Oat Flour Bread (Vegan, Oil-Free)

Breakfast

4-Ingredient Oat Flour Bread (Vegan, Oil-Free)

Straightforward-as-can-be 4-ingredient oat flour bread! It is vegan, oil-free, gluten-free, yeast-free, and nut-free. Use pre-made oat flour or grind your own, in seconds, with your blender (using rolled oats).

two slices of vegan oat bread on a cutting board

Vegan Oat Soda Bread

At last, a quick and straightforward loaf of bread made with 100% oat flour (no other flours, meals or binders)! And what a hearty, satisfying loaf it is to eat–whether solo, in sandwiches, as morning toast, or as accompaniment to dinner.

If you do not have oat flour on hand, not worry: I have instructions below for making oat flour from the rolled oats you already have in your pantry.

Trust me, you will want to try this ASAP!

a slice of oat bread, held in one hand, with a bite taken out of the slice

Recipe Benefits

This vegan oat flour bread is satisfying & satisfying, as well as:

  • 4 humble ingredients
  • Vegan (egg-free, dairy-free)
  • Gluten-free
  • Oil-free
  • Yeast-free
  • Nut-free
  • Free of added sugar
  • Especially straightforward to make
  • Made in one bowl
  • No added starches (e.g., tapioca starch, potato starch)
  • No added binders (e.g., psyllium husk or xanthan gum)
  • 2 grams fiber and 3 grams protein per slice

Ingredients

The exact amounts of each ingredient are indicated in the recipe card at the end of the post.Toggle betweenUS Customary(volume) andMetric(weights) for preferred measurement option.

overhead shot of glass bowls filled with the ingredients for oat flour bread
  • Oat flour
    • Certified gluten-free, as needed. Use packaged oat flour, or make your own from rolled oats (see the section below; use certified gluten free oats, as needed).I strongly suggest you either weigh the flour or very lightly spoon into dry measuring cups to measure.
  • Non-dairy milk
    • For example, oat milk, soy milk, or almond milk. If you are not following a vegan diet, feel free to use an equal amount of dairy milk.
  • Vinegar
    • I use apple cider vinegar, but you can use any light-colored vinegar. Alternatively, substitute an equal amount of lemon juice or lime juice.
  • Baking soda
    • Be sure to use bakingsoda, not baking powder. The two ingredients have very different strengths.

Salt is an optional, but recommended (for flavor) ingredient.

Tip: Grind Your Own Oat Flour in a Blender

You can use ready-made oat flour in this recipe, but I prefer to make my own from rolled oats. It is less expensive and making it requires almost no time at all.

2 photo collage showing rolled oats being made into oat flour

Use the same weight of oats as the amount of oat flour required for this recipe (360 grams). That is about 3 and 2/3 lightly packed cups of old-fashioned style rolled oats.

Place the rolled oats in your blender, press process or blend, and grind until the oats resemble especially-fine flour.

close up of a wooden spoon of oat flour

Step by Step Instructions

Note that the complete instructions are also in the recipe card below.

Step One: Preheat Oven & Prepare Baking Pan

Preheat the oven to 350F (180C). Spray a 9×5-inch loaf pan with nonstick baking spray. If you do not want to use nonstick spray, use a nonstick baking pan or line the pan in parchment paper.

It is important to have the oven heated and ready to go as soon as the batter is mixed.This is, essential, an oat flour soda bread. The vinegar and baking soda react as soon as the batter is combined. The bread needs to get into the oven immediately to benefit from the full strength of the baking soda reaction.

Step Two: Combine the Milk & Vinegar

In a measuring cup or bowl, combine the milk and vinegar. Let stand for five minutes to allow the milk to curdle slightly.

two photo collage showing the making of curdled milk

Step Three: Whisk the Dry Ingredients

In a large bowl, whisk the oat flour, baking soda and (optional) salt until blended.

large glass bowl filled with whisked oat flour and baking soda

Step Four: Add the Wet Ingredients

Add the milk-vinegar mixture to the large mixing bowl. Use a spoon or rubber spatula to stir until completely blended. The result will look more like a thick batter than a dough.

2 photo collage showing wet and dry ingredients for oat bread getting mixed together

Step Five: Spread Batter into Prepared Pan

Pour and spread the batter into the prepared pan, smoothing the top.

oat bread batter in a metal baking pan

Step Five: Bake the Bread

Get the gluten-free oat bread into the oven immediately (as mentioned above, the baking soda and vinegar react as soon as the batter is mixed; the batter will lose some of its rise if it is not place into the hot oven ASAP).

Bake the bread in the preheated oven for 55 to 60 minutes until deep golden brown, the top of the loaf has some cracks, and a toothpick inserted near the center of the loaf comes out with only a few moist crumbs attached.

loaf of oat flour soda bread n a cooling rack

Step Five: Cool the Bread

Cool the bread in the loaf pan for 15 minutes. before removing and cooling completely on a cooling rack.

oat flour soda bread, removed from its pan, cooling on a cooling rack

Tip: Cool the Bread Completely Before Slicing

Be sure to cool the bread completely before slicing it. The bread is much easier to slice when it is completely cooled. The bread is extremely straightforward to cut–including very thin slices–in the days after it is baked.

loaf of oat flour bread being cut into slices on a cutting board.

Frequently Asked Questions

  • How Should Vegan Oat Flour Bread Be Stored?Store the cooled bread in an airtight container at cool room temperature for two days, the refrigerator for one week or the freezer for up to six months.
  • What is the Taste & Texture of the Bread?The bread has a wholesome, nutty flavor that is wonderful plain and exceptionally satisfying when toasted. Enjoy it plain or add your go-to sweet or savory spreads and toppings.
  • Does the Bread Slice Easily?Yes. The bread is easier to slice thin after a day of storage (the crust softens). Use the thinner slices to make all manner of sandwiches!
two slices of oat flour bread
  • Can I Use Something Other Than Oat Flour?I have only tested this with oat flour, so I cannot recommend other gluten free flour blends or single gluten-free flours as substitutes. I have many bread recipes here on Nbirz if you are looking for a bread recipe that uses a particular flour (use the search function to look up more options).
  • Can I Use Water in Place of Milk?Yes, that should work. The bread may be marginally tougher, but still satisfying. You will still need to add the vinegar (it activates the baking soda).
  • What Can I Use in Place of the Vinegar?An equal amount of fresh lemon juice or lime juice can be used in place of the vinegar in this oat bread.
  • Is This a High Rising Bread?No. If you look at the photos for the finished bread, this is a low loaf.

Happy baking!

slices of oat flour soda bread with strawberry jam spread on top

Flavor Variations

You can add all manner of fanciness to this humble oatmeal bread, if you like. Here are some ideas to make this gluten-free bread extra special:

  • Chopped Nuts or Seeds:Add a handful of your go-to chopped nuts or seeds, such as walnuts, sunflower seeds, pumpkin seeds (pepitas), pecans, hemp hearts, sesame seeds, or poppy seeds.
  • Dried Fruit:Add a handful of dried currants, raisins (dark or golden), dried cranberries, chopped dried apricots, dried blueberries or dried cherries.
  • Chocolate:Add 1/2 cup of chocolate chips or chopped chocolate.
  • Herbs, Spices, Extracts:Add a teaspoon or so of your go-to spices (e.g., dried rosemary, ground cinnamon, vanilla extract, caraway seeds, or finely grated citrus zest (e.g., lemon zest, orange zest or lime zest).
  • Sweetener:Add a tablespoon of coconut sugar, brown sugar, maple syrup or molasses to the batter.

Related Quick Bread Recipes

  • Rustic Irish Oat Scone Bread (V, GF, Oil-Free)
  • Vegan Gluten-Free Oat Sandwich Bread {oil-free, yeast-free}
  • Vegan Chickpea Flour Soda Bread {oil-free, grain-free}
  • Quinoa Flour Almond Flour Soda Bread {vegan, oil-free, GF}
  • 3-Ingredient Vegan Oat Muffins {gluten-free, oil-free, sugar-free}
  • 4-Ingredient Vegan Power Bread {oil-free, GF}

4 Ingredient Oat Flour Bread

  • Prep Time: 8 minutes
  • Cook Time: 1 hour
  • Total Time: 1 hour
  • Servings: 1 loaf (14 slices)

Ingredients

  • 1 1/2 cups nondairy milk (or dairy, if not vegan)
  • 1 1/2 tablespoons light colored vinegar (see notes for options)
  • 3 cups oat flour (certified gluten-free, as needed)
  • 1 teaspoon baking soda
  • Optional: 1/2 teaspoon salt

Method

  1. Preheat the oven to 350F (180C). Spray a 9×5-inch (22.5×12.5 cm) loaf pan with nonstick cooking spray (alternatively, use a nonstick baking pan or line with parchment paper ).
  2. In a glass measuring cup or small bowl , combine the milk and vinegar. Let stand for 5 minutes to curdle.
  3. In a large bowl , whisk the oat flour, baking soda , and (optional) salt until blended.
  4. Add the milk-vinegar mixture, stirring until completely blended and smooth.
  5. Immediately spread batter evenly in prepared pan, smoothing the top.
  6. Bake in the preheated oven for 55 to 60 minutes until deep golden brown, cracked on top, and a toothpick inserted near the center comes out with only a few moist crumbs attached.
  7. Cool the bread in the pan for 15 minutes before removing to a cooling rack . Cool completely before slicing.

Notes

Storage: Store the cooled oat bread in an airtight container at cool room temperature for 3 days, the refrigerator for 1 week or the freezer for up to 6 months. DIY Oat Flour: You can buy oat flour, but I typically make my own from rolled oats . It is straightforward. Use an equal weight of rolled oats (360 grams), which is about 3 2/3 cups of lightly packed old-fashioned rolled oats . Blend the dry oats in a blender until they are a very fine flour (it takes seconds). Vinegar Options: You can use any light colored vinegar, or substitute an equal amount of lemon juice or lime juice.