
Reliable 4 ingredient banana oat bran muffins! They are gluten-free, oil-free, vegan, and added sugar free. Customize them in countless ways with various add-ins (chocolate chips, anyone?) and flavorings of your choosing.

I’m bringing oat bran back.
Oat bran was huge back in the 1980s. HUGE! Oat bran muffins, in particular, were a nation wide obsession: if you wanted good health, a daily oat bran muffin was the place to start.
While I am not here to renew oat bran muffin mania (or am I? ), I am aiming to get you excited about these oat bran muffins in particular.
The muffins are lightly sweet, and perfectly portable, ready for grabbing and gnoshing as you head out the door. Alternatively, split one open and slather with almond butter and raspberry preserves (my go-to two-step treatment), then savor while you sip coffee and solve Wordle.

What is Oat Bran?
So what the heck is oat bran, anyway? Oat bran is the outer layer of the husked oat kernel (oat groat). Rolled oats and steel cut oats contain all parts of the oat groat–the endosperm, germ, and bran–but oat bran is also available as its own product.
Oat bran is a very rich source of soluble fiber, and a good source of protein, calcium, iron, thiamine, phosphorus, riboflavin, magnesium, and zinc.
Use oat bran to make a hearty, creamy hot cereal, or add it to baked goods, like these muffins, for a nutty oat flavor and toothsome texture.

Recipe Benefits
- Only 4 essential ingredients
- 4 grams fiber per muffin
- 4 grams protein per muffin
- 88 calories per muffin
- Vegan (egg-free, dairy-free)
- Gluten-free
- Oil-free
- Nut-free (e.g., no almond butter, peanut butter, or other nuts)
- Added sugar free
- Quick and straightforward to make
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.

- uncooked oat bran (certified gluten-free, as needed)
- rolled oats (certified gluten-free, as needed)
- baking powder (certified gluten-free, as needed)
- very ripe bananas (lots of black spots on the peel)
You will also need water (I use filtered tap water) and (optional, but recommended) salt for the recipe.
Consider this recipe a template. The muffins are wonderful plain, or add all kinds of stir-in embellishments. I have plenty of suggestions in the notes and recipe card.
Step by Step Instructions
Note that the complete instructions are also in the recipe card below.
Step One: Preheat Oven & Prepare Pan
Preheat oven to 350F (180 C). Line a 12-cup standard muffin tin with silicone muffin cup liners. (If using paper liners, I suggest lightly spritzing the insides of the liners with nonstick cooking spray.)
Step Two: Blend the Bananas & Oats
In a blender or food processor, process the bananas, water and rolled oats until smooth.
Step Three: Combine Oat Bran & Banana Mixture
In large bowl, combine the banana mixture (wet ingredients), oat bran and optional salt (not the baking powder). Let soak for 10 minutes to soften the oat bran.
Step Four: Add Baking Powder
Add the baking powder to the batter, stirring until combined.

Step Five: Portion the Batter
Divide the muffin batter evenly into the prepared muffin cups, smoothing the tops. I like to use a spring loaded ice cream scoop for straightforward portioning.

Step Six: Bake
Bake in the preheated oven for 20 to 25 minutes until golden brown and the center is firm to the touch. Cool 5 minutes in pan on a wire rack, then remove muffins to rack and cool completely.

Step Seven: Cool the Muffins
Cool the muffins for 5 minutes in the pan on a wire rack, then remove from the muffin pan to a rack and cool completely.
Storage
Store the cooled muffins in anairtight containerat cool room temperature for 4 days, the refrigerator for 1 week, or the freezer for up to 6 months.
Variations
- How can I make the muffins moister?
- Oil Version:Replace some or all of the water with oil or melted vegan butter.
- No-Oil Version: Replace some or all of the water in the withfull-fat coconut milk(coconut banana muffins!), cashew cream, or runny nut butter or seed butter (e.g., peanut butter, almond butter, tahini or sunflower seed butter)
- How can I make the banana oat bran muffins sweeter?You can add 1 to 3 tablespoons of the sweetener of your choice, such ascoconut sugar,maple syrup, brown sugar, date syrup, agave nectar or brown rice syrup. Adding other ingredients (e.g., chocolate chips, dried fruit or fresh fruit) will also make the muffins sweeter (see ideas below).
Add-In Ideas
Customize your banana oat bran muffins to your tastes with one, two, or more of these add-in ideas:
- Spices:Add 1/4 to 2 teaspoons of your go-to spice, such as cinnamon, nutmeg, cardamom, allspice, ginger, or pumpkin pie spice. Or add a combination of spices (no more than 2 teaspoons total) for fragrant spice muffins.
- Dried Fruit:Stir in up to 1/2 cup (118 mL) of chopped dried fruit, such as raisins, dried apricots, dried cherries,dried cranberriesor 1 cup of chopped dried apples.
- Fresh Fruit:Add up to 3/4 cup chopped fruit or berries to the batter. For example, blueberries, raspberries, chopped ripe (but not overripe) banana, apples, or mango. You will likely need to bake the muffins for an additional two to five minutes, depending on the moisture of the fruit and quantity added.
- Chocolate:Add up to 1/2 cup of your go-to chocolate chips or chunks.
- Nuts or Seeds:Add up to 1/2 cup chopped nuts or seeds, such as walnuts, pecans, peanuts,pepitas, orsunflower seeds. Alternatively, sprinkle a few nuts or seeds on top before baking.
- Extracts or Zests:Add a teaspoon or two of pure vanilla extract or 1/2 to 1 teaspoon of almond extract, rum extract or coconut extract. Or add one to two teaspoons of finely grated lime, lemon or orange zest.
- Coconut:Add up to 1/2 cup shredded unsweetened coconut or flake unsweetened coconut (toasted or un-toasted). Alternatively, sprinkle the tops of the muffins with coconut before baking.
Banana Oat Bran Muffins (4 ingredients)
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Total Time: 35 minutes
- Servings: 12 muffins
Ingredients
- 1.5 cups mashed banana (very ripe)
- 1 cup rolled oats (certified gluten-free, as needed)
- 2/3 cup water
- 1.5 cups uncooked oat bran (certified gluten-free, as needed)
- 1 tablespoon baking powder (certified gluten-free, as needed)
- Optional: 1/4 teaspoon salt
Method
- Preheat oven to 350F (180 C). Line a 12-cup standard muffin tin with silicone liners. (If using paper liners, I suggest lightly spritzing the insides of the liners with nonstick cooking spray .)
- In a blender or food processor , process the bananas, water and rolled oats until smooth.
- In large bowl , combine the banana mixture, oat bran and optional salt ( not the baking powder ). Let soak for 10 minutes to soften the oat bran.
- Add the baking powder to the batter, stirring until combined.
- Divide the muffin batter evenly into the prepared cups, smoothing the tops.
- Bake in the preheated oven for 20 to 25 minutes until golden brown and the center is firm to the touch. Cool 5 minutes in pan on a wire rack, then remove muffins to rack and cool completely.
- Cool 5 minutes in pan on a wire rack, then remove muffins to rack and cool completely.
Notes
Storage: Store the cooled muffins in an airtight container at cool room temperature for 4 days, the refrigerator for 1 week, or the freezer for up to 6 months. Tip: Oat bran can be found where oats and hot cereal are shelved in the supermarket. It s often labeled “oat bran cereal” or “oat bran hot cereal,: Take a look at the label to confirm, but it should say “Ingredients: Oat Bran.” and nothing more. Add-In Ideas Spices: Add 1/4 to 2 teaspoons of your go-to spice, such as cinnamon, nutmeg, cardamom, allspice, ginger, or pumpkin pie spice. Or add a combination of spices (no more than 2 teaspoons total) for fragrant spice muffins. Dried Fruit: Add up to 1/2 cup (118 mL) of chopped dried fruit, such as raisins, dried apricots, dried cherries, dried cranberries or 1 cup of chopped dried apples ( caramel apple muffins!) . Fresh Fruit: Add up to 3/4 cup chopped fruit or berries to the batter. For example, blueberries, raspberries, chopped ripe (but not overripe) banana, apples, or mango. You will likely need to bake the muffins for an additional two to five minutes, depending on the moisture of the fruit and quantity added. Chocolate: Add up to 1/2 cup of your go-to chocolate chips or chunks. Nuts or Seeds: Add up to 1/2 cup chopped nuts or seeds, such as walnuts, pecans, peanuts, pepitas , or sunflower seeds . Alternatively, sprinkle a few nuts or seeds on top before baking. Extracts or Zests: Add a teaspoon or two of vanilla extract or 1/2 to 1 teaspoon of almond extract, rum extract or coconut extract. Or add one to two teaspoons of finely grated lime, lemon or orange zest. Coconut: Add up to 1/2 cup shredded or flake unsweetened coconut (toasted or un-toasted). Alternatively, sprinkle the tops of the muffins with coconut before baking.







