Banana Walnut Oat Muffins

These healthy banana walnut oat muffins are naturally sugar and flour free, quick and easy to make, soft, filling, and light! They are perfect for a make-ahead breakfast, or a leisurely and satisfying breakfast treat!

close up image of banana walnut oat muffins with a banana in the background and a sprinkle of rolled oats

These Banana Walnut Oat Muffins Are:

  • Naturally sweetened with mashed bananas
  • Free of highly processed flours
  • Easily made gluten free
  • Healthy
  • Hearty & filling
  • Low glycemic
  • Perfect on-the-go
  • Freezer friendly
  • Delicious!

Common Questions About This Recipe

Can I make these vegan by using flax eggs?

  • I’ve tested this recipe with both real egg and flax egg, and the real egg is definitely better. It works okay with the flax egg, but it’s hard to get the center to cook all the way through, so I’d recommend muffin tins over loaf pans, and be sure to let it cool completely before cutting into it.

Can I make this recipe in a loaf pan?

  • This recipe works great a mini loaf pan! I wouldn’t use regular loaf pans in order to avoid gooey centers. You’ll need to cook them a little longer too if you use loaf pans, but exactly how much will depend a bit on your oven and the size of your pans. Just take them out when the loaves are holding together well and wait to cut into it until it has cooled for at least 15 minutes.

Can I skip processing the oats and just use oats?

  • If you prefer not to eat anything flour-like, you can skip the processing of the oats and just use quick oats for all of it. They will still be very yummy, but I find that the addition of a little bit of lightly processed oat flour improves the texture.

Substitutions & Modifications

  • You can swap the nut butter for coconut oil in this recipe, both work great. A little bit of oil or fat is important for flavor though, don’t skip it!
  • To make these muffins gluten free, be sure to use certified gluten free oats.
  • If you eat regular flour, feel free to replace the oat flour for your all-purpose flour of choice. They will still work great.
  • Experiment with fun add-ins such as other nuts, seeds, dried fruit, coconut, cacao nibs, or chocolate chips. This recipe is very versatile!

Tips for Success

  • Use paper muffin liners or well-greased muffin tins to prevent sticking. I love my reusable silicone baking cups
  • The batter for these treats is too thin and wet to make cookies out of. It won’t hold its shape if poured onto a baking sheet. If it’s cookies you’re after, check out my awesome breakfast cookie recipe.

More Healthy Baking Inspiration:

If you make these soft and delicious banana walnut oat muffins, leave a star rating or comment below! Your feedback is so helpful to me and other readers. You can also tag me in your meal pics on Instagram @katiesconsciouskitchen, or join my free private facebook group to share your creations and inspire others! I love to see what you all are making.

Banana Walnut Oat Muffins

These healthy muffins are quick and easy to make, soft, filling, and light, and make a delicious, satisfying breakfast treat whether you eat sugar and flour or not!
5 from 2 votes
Print Pin Ratings & Comments
Active Time: 10 minutes
Inactive Time: 20 minutes
Cooling Time: 15 minutes
Servings 6 muffins


Dry Ingredients

  • 1/2 cup quick oats, + 1/8 cup for processing, see instructions
  • 1/4 cup chopped walnuts, a few reserved for decoration
  • 1 tsp cinnamon
  • 1/4 tsp fresh ground nutmeg
  • 1 tbsp baking powder
  • 1/4 tsp salt

Wet Ingredients

  • 2 bananas, mashed
  • 1 egg, or 2 Tbsp ground flax seed mixed with 3 Tbsp of water
  • 2 tbsp peanut butter
  • 1 tsp vanilla

Useful Equipment


  • Preheat the oven to 350°F.
  • Mash the wet ingredients together in a small mixing bowl using a fork or potato masher.
  • Optional step: In a blender cup, pulse a handful or two of dry rolled oats or quick oats to make a coarse flour. This step isn't necessary but it will give the muffins a softer texture and better absorbency.
  • Stir in the dry ingredients, plus 1/8 cup (or 2 tablespoons) of your homemade oat flour.
  • Fill 6 greased or lined muffin tins. Decorate with a few walnuts and a sprinkle of fresh ground nutmeg.
  • Bake for 20 minutes, or until the muffins are golden and holding together well.
  • Allow to cool for at least 10 minutes before eating.


  • This recipe makes about 6 muffins. I like to eat 2 for a lighter breakfast, or 3 for a more filling breakfast.
  • For a measured breakfast in ounces, use 2.5 oz of oats (including the processed oats), 1 oz of nut butter, 2 oz of walnuts, 8 oz banana.

Nutrition Information

Serving: 1muffinCalories: 138kcal (7%)Carbohydrates: 16g (5%)Protein: 4g (8%)Fat: 7g (11%)Saturated Fat: 1g (6%)Trans Fat: 1gCholesterol: 27mg (9%)Sodium: 343mg (15%)Potassium: 229mg (7%)Fiber: 2g (8%)Sugar: 6g (7%)Vitamin A: 67IU (1%)Vitamin C: 3mg (4%)Calcium: 138mg (14%)Iron: 1mg (6%)
Want to Save this Recipe?Become a KCK member to create your own digital cookbooks, access my full recipe library, get my customizable weekly meal plans, and automatically generate grocery lists! Learn More →

Looking for an Awesome Recipe & Meal Planning App?


  1. Renae M

    I love your recipes. I can’t wait to try this one.

    Is a Tablespoon the correct measurement for the baking powder? This seems like a lot for this amount of ingredients. Just checking before I make it.
    Thanks for all you do.

    • Aww, thanks Renea! Yep, it’s a lot but without flour and all the heavy ingredients, I’ve found these need a good boost. If you find you can taste the baking powder, experiment with reducing it, or add more spices to cover it up. I couldn’t taste it. Let me know how it goes!

    • Michelle Burdett

      Please can you share conversion cup to ounces

  2. Anonymous

    Hi Katie,
    I was looking for the Banana Oat Zucchini Walnut muffin recipe? Seems to be gone from your recipes? Could you tell me where to find it? Thanks! Nan

    • Hi Nan,
      I made it again recently and it wasn’t as good as the first time I made it, I took it down temporarily to work on the recipe for consistency and make a few tweaks. Have you made it before?

  3. Pingback: Healthy Lemon Poppy Seed Muffins | Katie's Conscious Kitchen

  4. Wow these look delicious! They would be perfect for a midday snack.

  5. Pingback: Banana Walnut Oat Muffins (Sugar & Flour Free) — Katie’s Conscious Kitchen | My Meals are on Wheels

  6. Pingback: Peanut Butter & Jelly Baked Oatmeal | Katie's Conscious Kitchen

  7. Pingback: Blueberry Banana Oatmeal Pancakes | Katie's Conscious Kitchen

  8. Pingback: Sugar & Flour Free Baking Hacks | Katie's Conscious Kitchen

  9. Pingback: Flourless Pumpkin Oat Muffins (Vegan!) | Katie's Conscious Kitchen

  10. Pingback: Lemon Millet Breakfast Cookies - Katie's Conscious Kitchen

  11. What is the calories in this . I Am on Noom

    • Katie Gates

      Hi Linda, I just added the nutrition facts at the bottom of the recipe card.

  12. Martha

    5 stars
    I made these with regular oats, no processing to make them flour-like. I enjoy the texture and they are perfectly yummy! I use oats also for your Morning Flory muffins and I love them!

Leave a Comment

Your email address will not be published.

Recipe Rating