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The Ambitious Kitchen Cookbook
A New York Times Bestseller

Marbled Banana Muffins

Incredible marbled banana muffins baked with a swirl of fudgy chocolate batter and plenty of melty chocolate chips. These fun, easy marbled chocolate banana muffins have a cozy hint of cinnamon flavor and make such a fun breakfast, snack, or treat!

Prep Time
20 mins
Cook Time
20 mins
Total Time
40 mins

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  • says:

    5 stars
    These are delicious! They turn out nice and fluffy and full of flavor. I had to bake mine for 25 minutes as my muffin tins were full to the top. Definitely keeping this recipe!

    • replied:

      So glad you enjoyed!!

  • says:

    Can you use a ready to drink protein shake instead of milk?

    • replied:

      Hmm I haven’t tested it, but I don’t see why not! Let me know if you give it a try 🙂

  • says:

    5 stars
    Yikes! Maybe a little too good!!! Thanks!

    • replied:

      Haha! Glad you enjoyed!

  • says:

    5 stars
    These look amazing! I want to add a scoop of vanilla protein powder–how would that change the ratio of ingredients? Thank you!!

    • replied:

      I haven’t tried it but you could add half a scoop to the chocolate and half to the banana 🙂 you may need to add more milk if it seems dry, maybe a tablespoon to each batter. Hope this helps!

  • says:

    5 stars
    Just making my way through all your amazing muffin recipes & this one is a fave!

    • replied:

      Sop happy to hear that!

  • says:

    5 stars
    This was delicious and super easy to make. For a vegan version I subbed out the eggs for about 120g of sourdough starter.

    • replied:

      OH amazing! I’m glad that worked out well!

  • says:

    5 stars
    These muffins are delicious! Thank you! Turned out perfectly, and even better the next day.

    • replied:

      So happy to hear that!

  • says:

    5 stars
    These are such a creative and delicious take on your basic banana muffin. So good!

    • replied:

      Absolutely! Glad you enjoyed!

  • says:

    5 stars
    OMG! I made this the other night but instead of muffins I made it in a loaf pan. Can I just say it was the best banana bread I’ve ever made!! So good in fact “we”…ME…ate in in less than 2 days. The cinnamon puts it over the top. I just ran to the store to make it again tonight! I made it exactly as written (other than making it a banana bread instead of muffins). This is next level! Thank you so much!!

    • replied:

      The best!! So happy you loved it!

  • says:

    5 stars
    These are delicious and easy to make. I forgot to add (how, I don’t know!) the chocolate chips to the tops and also didn’t swirl the batter in each one. Differences due to that are probably minor!

    • replied:

      I’m glad they still turned out delicious!!

  • says:

    Can anyone tell me is coconut oil or butter better in this?
    I love both

  • says:

    5 stars
    My go-to banana muffin recipe. The marbling makes it so much better. I always scoop out the plain batter, add the cocoa to the leftover, and then scoop that on top – easier and less dishes.

    • replied:

      So happy to hear that! And great tip 🙂

  • says:

    5 stars
    This recipe is fantastic. I followed it exactly except subbed butter for oil and also added some walnuts. The muffins turned out gorgeous, moist and fluffy and the perfect amount of sweet. I’m not surprised because all Ambitious Kitchen recipes are amazing but this one was so easy and so delicious. Will be making again very soon!
    Thank you!

    • replied:

      Amazing! So happy you loved these!

  • says:

    5 stars
    I accidentally did 1/3 cup cacoa powder instead of 1/4 🤣 but they still worked out pretty good! Love the chocolate banana combo

    • replied:

      Oops! I’m glad they still worked out!

  • says:

    5 stars
    So yummy! I added in a few tablespoons of hemp hearts to boost the nutrition 🙂 I love having these paired with coffee

    • replied:

      Perfect! Such a great breakfast or snack with coffee 🙂

  • says:

    The chocolate portion of my batter was so thick that I couldn’t really even swirl them. I used Cacao, do you think that is why? I barely could get my batter to absorb it all (so I’m sure over mixed too). Help!

    • replied:

      Did you weigh your ingredients? I’ve made these 3 times and my videographer and photographer also made them without issue. Perhaps your bananas weren’t large enough and the batter needed more moisture?

  • says:

    5 stars
    Super tasty and easy to make! I normally don’t like chocolate in my banana bread/muffins but these were delicious.

    • replied:

      So glad you loved them!

  • says:

    5 stars
    Looks great. Making it today or tomorrow. I’m wondering how many grams is 3 large bananas? I measured my large banana with peel and it was about 200 grams. Should we be putting in 600ish of banana (weighing before peeling)? After peeling, probably like 450 or 500 grams?

    • replied:

      Hi! Typically 1 large banana is around 150g, so about 450grams should do the trick!

  • says:

    Hi Monique- making these for my daughter coming home for spring break soon- do I have to use muffin liners or can I bake in a silicone tray? And can avocado oil be used in place of coconut oil? Thanks for the many great recipes in my Notes!💓

    • replied:

      I think a silicone tray should work, too! The avocado oil might change the flavor in these slightly, but let me know if you give it a try 🙂

  • says:

    How many cups do you think 3 large mashed bananas is?

    Thanks so much.

    • replied:

      It should be 1 1/3 cups!

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