Peanut Butter Cup Banana Cake

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Peanut Butter Cup Banana Cake

Does the world need more dessert with peanut butter cups? Duh.

I’ve been on a banana kick this summer, and it’s probably just me making up for lost time. I barely posted any banana recipes in the first two years of the blog, so this summer it’s just bananas all the time. Plus, I don’t like to keep them on the counter in the summer. The bugs, they will come.

Plus, this feels like the right time to write about this cake. There’s a slice of it on my desk in my new office, and I’m looking out at the tree by my window and contemplating happy thoughts. Why not add a moist banana cake filled with both peanut butter cups and peanut butter chips to the mix? A gluten-free one, might I add?

Peanut Butter Cup Banana Cake

I’ve never had a tree by a window where I work, and I’m finding it to be a very cheerful thing. There’s something about connecting to nature when you spend the day encased in cinder block that is very soothing.

The cinder block leads me to my big question here. You ready? Adhesive.

Peanut Butter Cup Banana Cake

Yes, I said adhesive. I’ve been doing a lot of wall mounting as I set up this office, and things keep falling down. Seriously, one crash after another. I’ve been using adhesive mountings because I can’t make holes in the wall, but it’s not going well. You see, cinder block is very resistant to adhesive.

Peanut Butter Cup Banana Cake

Any tips? And no, super glue is not one of them. I can’t do that. Or crazy glue. Or any glue at all. Can you help me before I lose my mind? If I hear one more thing come crashing to the floor, I might run for the hills.

A few months ago, I made this banana toffee snack cake, and people loooooved it. Seriously, I can never predict what people will go for. I make the most amazing thing and the pictures turn out great, and barely a reaction. But sometimes, a recipe just goes sailing through the interweb in the most gloriously unpredictable way.

Peanut Butter Cup Banana Cake

This, then, is an experiment. I used the same cake base, but I changed up the mix-ins. To be honest, I love both versions. If they were my children, I’d love both equally. But as a peanut butter lover, I’d have to direct you toward this one. I mean, come on. It’s so happy.

Peanut Butter Cup Banana Cake

Like my other banana recipes, this one is effortlessly gluten-free, thanks to oat flour. And it’s also super easy with no mixer or crazy bowl action needed. That means if I see a banana on the counter, it’s getting baked. This recipe is too simple not to go for it.

If you have any help to give me with adhesive matters, let me know. I need it. Pleeeeeeease!


Peanut Butter Cup Banana Cake


1/2 cup canola oil
3/4 cup firmly packed light brown sugar
2 eggs
1 cup Greek yogurt (I used the vanilla flavor)
2 ripe bananas, mashed
1 teaspoon vanilla
2 cups oat flour (you can use regular flour if gluten isn't an issue)
1 teaspoon baking soda
1/4 teaspoon salt
1/2 teaspoon ground cinnamon
1 cup peanut butter chips, divided
20 Reese's miniatures, chopped and divided


  1. Preheat the oven to 350. Line an 8-inch square pan with foil and coat with cooking spray. Set aside.
  2. In a large bowl, combine the oil and brown sugar, mixing until smooth and all the brown sugar lumps are gone. Add the eggs, yogurt, mashed bananas, and vanilla. Mix well.
  3. In a small bowl, combine the oat flour, baking soda, salt and cinnamon. Add the dry ingredients to the wet ingredients. Mix until well combined.
  4. Take half of the peanut butter cups and peanut butter chips and mix them into the batter.
  5. Pour the batter into the prepared pan. Sprinkle the remaining candy on top.
  6. Bake 30-35 minutes until the a toothpick inserted into the center of the cake comes out clean.
  7. Cool completely. Cut into squares. Store covered.



I fulfill many roles in life: wife, mother, teacher, everlasting learner. This site is dedicated to one role that expresses my creativity in ways that I find consistently challenging and rewarding: baker. Inventing new ways to enhance food, especially if that food involves chocolate or peanut butter (or both!), is a passion of mine. I look forward to sharing my ideas with you.

This Post Has 28 Comments

  1. Gayle @ Pumpkin 'N Spice

    More peanut butter cups are definitely needed all the time! Love that you added them to banana cake, Mir! This is just about the perfect sweet treat!
    Gayle @ Pumpkin ‘N Spice recently posted…Peanut Butter Chocolate Chip Cookie Dough Breakfast CookiesMy Profile

    1. Mir

      I’m all in favor of more PB cups as a general rule!

  2. Amanda

    This is a wonderful amount of peanut butter cups in this cake. Something addictive happens when peanut butter and bananas meet…and I like it! This sounds amazing!
    Amanda recently posted…Gingersnap CakeMy Profile

    1. Mir

      So true. PB and banana are addictive!

  3. Shashi @ RunninSrilankan

    Mir, I wish I had some tips for you on mounting stuff on a cinder block wall – gah – if only Home Depot had cinder wall hooks or something!
    By the way, I wouldn’t mind staring at a cinder block wall with a slice of this decadently moist, gluten free banana cake filled with peanut butter cups and peanut butter chips! I’m so loving the vanilla Greek yogurt you used – do you think I could use coconut oil instead of canola? I don’t have any canola at home.
    Good luck hanging stuff on that wall – and thanks for this recipe – I bet it will go viral!
    Shashi @ RunninSrilankan recently posted…Aval Laddu ~ Spiced Pecan Banana Rice BallsMy Profile

    1. Mir

      Oh well. I’ll figure out the cinder block. At least I have cake taken care of!

  4. Cheyanne @ No Spoon Necessary

    Hmmmm… I’m trying to remember what the heck I used my freshman year in college for the few months I stayed in a dorm and we had cinder block walls. For the life of me I can’t remember what I used to hang stuff on the walls!! Lemme think on that. Watch, it will probably come to me in the middle of the night. #Insomnia. Anyways, yes to nature out the window as you work. So calming, right!? And as for this cake, YESSS! The world totally needs more peanut butter cups… and ‘naners, for that matter. LOVE this, Mir! Looks super delicious and like I could easily demolish 4-10 slices for breakfast, easy. 😉 Cheers chicka!
    Cheyanne @ No Spoon Necessary recently posted…Grilled Scallops with Avocado & Corn Salsa {and Honey-Lime Vinaigrette}My Profile

    1. Mir

      Ha! If it comes to you, let me know. I need hellllp.

  5. Alice @ Hip Foodie Mom

    if you can’t put any holes in the walls, you might be in a tough position. . maybe just leaning a few photos or framed things on your desk and the wall? snap a photo and let us know what you decide to do! love love love this peanut butter cup banana cake!!!
    Alice @ Hip Foodie Mom recently posted…16 Zucchini Recipes + $50 VISA Gift Card Giveaway!!My Profile

    1. Mir

      I’m a big fan of those decals you put on walls, so that’s helping. And at least I have cake!

  6. David @ Spiced

    Ummm…more peanut butter cups? Yes. The answer to that question is always yes. ALWAYS! This cake looks delicious, Mir. Now as far as that wall, I remember we used the blue painters tape in college to hang flyers because it would come off easily. But some of those walls were concrete….I wonder if that would work for you??
    David @ Spiced recently posted…Rosemary Garlic SmashfriesMy Profile

    1. Mir

      Blue tape. BRILLIANT. I just ordered some thanks to you!

  7. Aimee @ ShugarySweets

    OMG there are no words for this cake, except pass me a fork 🙂
    As for your wall hangings, I’m of no help 🙁 GOOD LUCK!
    Aimee @ ShugarySweets recently posted…Zucchini “NOT APPLE” CrumbleMy Profile

    1. Mir

      I’ve never been a decorator, so it’s hard. I’m with you on wall hangings, Aimee!

  8. annie@ciaochowbambina

    Ahhh yes – the trials of decorating an office in a school! I sure do remember those days! I also remember the first time I had an office with a perfect view of a tree…it made all the difference! As would a slice or two of this cake teetering on file folders!
    annie@ciaochowbambina recently posted…Watermelon Gazpacho with Jalapeño and Basil Olive OilMy Profile

    1. Mir

      Trees are so lovely, aren’t they?

  9. Alaina @ A Not So Quiet Kitchen

    This cake looks so so so good!! Chocolate, Peanut Butter and banana? The perfect combo in my book! Love this!

    1. Mir

      Agree 100%, Alaina!

  10. Manali@CookWithManali

    “Does the world need more dessert with peanut butter cups?” The answer to that is a big YES! Always! lol Love this cake! and you can probably tape stuff, but the tape won’t look pretty on the wall I guess :/
    Manali@CookWithManali recently posted…Zucchini Chocolate MuffinsMy Profile

    1. Mir

      Always more PB cups! Always.

  11. mira

    You always come up with amazing baking ideas Mir! Love these and anything with peanut butter! Good luck decorating! Hmmm tape won’t work…
    mira recently posted…Vanilla Bean Cheesecake With Biscoff Cookie Crust RecipeMy Profile

    1. Mir

      Regular tape or two-sided, nope. I’ll keep thinking about it!

  12. Kate @ Framed Cooks

    There will NEVER be too many peanut butter cup things in the world. Meantime, my daughter (the third grade teacher) is having similar hang things on the wall issues…I’ll watch the comments to see what you both come up with! 🙂
    Kate @ Framed Cooks recently posted…Shortcut Cannoli Ice CreamMy Profile

    1. Mir

      I’m trying the blue tape to see how it goes. Let me know if she has any inspiration!

  13. Dorothy @ Crazy for Crust

    Literally, this is my heaven. Banana + peanut butter = HEAVEN!
    Dorothy @ Crazy for Crust recently posted…Small Batch Skillet Blondie for twoMy Profile

    1. Mir

      Agreed. The best combo!

  14. Laura @ Laura's Culinary Adventures

    There is no such thing as too many recipes with peanut butter! 🙂
    Laura @ Laura’s Culinary Adventures recently posted…Spinach with Golden Raising and Pine NutsMy Profile

    1. Mir

      Totally could not agree more!

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