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Home ยป Recipes ยป Desserts

Honey Peanut Butter Banana Mug Cake

Published: Jun 5, 2019 ยท Modified: Aug 8, 2019 by Kate ยท This post may contain affiliate links

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Spoon lifting scoop of cake out of black mug

After enjoying a few of these Apple Cinnamon Mug Cakes last week, I am really getting into mug cakes again, and this honey peanut butter banana mug cake recipe is one of my absolute favorites. It's super moist thanks to the banana and honey and strikes the perfect balance of easy yet exciting. It does take a bit more time than a basic vanilla or chocolate mug cake, but most of the ingredients are kitchen staples, and you can still go from no cake 🙁 to "YAY! cake!" in less than 7 minutes. Plus, there’s a warm, honey-sweetened and slightly salty peanut butter center, need I say more?

This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you make a purchase through the link, it won’t cost you more but I may earn a small commission. I only recommend products that I personally use and love!

Honey Peanut Butter Banana Mug Cake Ingredients

The ingredients are mostly pantry staples as I mentioned: flour, honey, baking powder, milk, oil, salt, vanilla, banana and peanut butter. There is actually no sugar in this recipe. Between the honey and banana (ripe are the best of course!), the cake is plenty sweet. And, if you're like me, you will definitely want to drizzle on some extra honey after it's cooked, just for good measure!

Top down view of mug cake with banana pieces on the top and a bunch of bananas on the side

How to Make Honey Peanut Butter Banana Mug Cake

Like most mug cakes, this one is easy to make. But, it is slightly more involved than just mixing all the ingredients together. It's totally worth the bit of extra effort though I promise!

Step 1: Mix the Dry Ingredients

Just dump in the flour, baking powder, and a pinch of salt. Mix together directly in a large microwave safe mug. Or, alternatively - if you want to unmold the mug cake to serve it, grease the mug and mix the ingredients in a separate bowl.

Mixing Mug Cake Dry Ingredients

Step 2: Add in the Wet Ingredients

Now pour in the oil, 1 tablespoon honey, milk and vanilla. Mix well until most of the lumps are gone (but don't overmix, stop when the batter is mostly smooth).

Mixing Dry Mug Cake Ingredients with Wet

Here is what it looks like when it's all mixed:

Cake batter in a mug with a measuring cup of chopped banana on the side

Step 3: Add the Chopped Banana

This is simple enough, just dump in the banana and give a quick stir. I recommend not chopping your banana too finely though. Otherwise the pieces just sort of melt and you don't get nice, defined chunks in the final cake. If you are mixing your batter in a separate bowl, at this point transfer it into the greased mug.

Mug of Batter with banana chunks inside

By the way, the measuring cups and spoons I'm using here are the OXO Good Grips Measuring Cups and Spoons Set and I absolutely love them! They are sturdy and have nice handles that are easy to grip (makes sense since they are literally called "Good Grips"!).

Step 4: Add the Peanut Butter Honey Filling

In a separate small bowl, mix the remaining 1 tablespoon of honey, peanut butter, and a good pinch of salt.

Hand stirring peanut butter and honey together in a ramekin

Take all of the peanut butter honey mixture onto the tablespoon and plop it down into the middle of your batter.

Spoon with scoop of peanut butter going into the middle of cake batter in a mug

Lift the spoon off the peanut butter glob. Then use the back of the spoon to push the peanut butter down into the batter. It's ok if some of the peanut butter peeks out of the top. It should look something like this:

Honey Peanut Butter Banana Mug Cake Ready to Microwave

Step 5: Microwave and Enjoy Your Delicious Honey Peanut Butter Banana Mug Cake!

Microwave on high for 90 seconds and check the cake, if the top is still a little bit wet, microwave for another 15 seconds or until the top is firm. If you want to unmold the cake (and greased the mug beforehand!), run a knife around the edges of the cake first to help it slide out easily. Top the cake with additional chopped banana and a drizzle of honey if you like and enjoy!

Honey Peanut Butter Banana Mug Cake on Plate with pieces of banana and honey drizzle on the top

If you're into mug cakes, check out some of my other favorites below!

  • mug cake with Biscoff cookies and Biscoff spread on top and spoon scooping bite out of cake.
    Biscoff Mug Cake
  • chocolate berry mug cake on plate with spoon on the side
    Chocolate Berry Mug Cake
  • gingerbread mug cake with scoop taken out and spoon sitting on the side
    Gingerbread Mug Cake
  • mocha mug cake with raspberries and spoon
    Mocha Mug Cake

Note: This post was originally published on November 7, 2017 and updated on June 5, 2019.

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๐Ÿ“– Recipe

Honey Peanut Butter Banana Mug Cake

Spoon holding scoop of cake above a mug with cake and bananas inside
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4.9 from 15 reviews

A deliciously moist honey banana mug cake surrounds a warm, slightly salty honey peanut butter center.

  • Author: Kate
  • Prep Time: 5 minutes
  • Cook Time: 90 seconds
  • Total Time: 6 minutes 30 seconds
  • Yield: 1 mug cake 1x
  • Category: dessert
  • Method: microwave
  • Cuisine: American

Ingredients

Scale
  • 5 tbsp. flour
  • ยฝ tsp. baking powder
  • 2 pinches salt, divided
  • 1 tbsp. vegetable oil
  • 3 tbsp. milk
  • ¼ tsp. vanilla
  • 2 tbsp. honey, divided
  • ¼ c. chopped banana (about ½ small banana)
  • 2 tbsp. peanut butter
  • extra honey and chopped banana for topping (optional)

Instructions

  1. Mix flour, baking powder, and pinch of salt in large, microwave safe mug (see note). Mix in oil, milk, 1 tbsp. honey and vanilla until smooth. Add in chopped banana, stir gently to combine.
  2. Mix together 1 tbsp. honey, 2 tbsp. peanut butter and generous pinch of salt in a separate bowl.
  3. Scoop honey peanut butter mixture out of the bowl and place in the middle of the cake batter. Press down on the peanut butter with the back of a spoon so the peanut butter sinks down into the batter (peanut butter doesn't need to be completely covered).
  4. Microwave on high for 90 seconds, or until the top of the cake is firm (after the first 90 seconds, microwave in 15 second increments until cake is cooked).
  5. If unmolding cake, run a knife around the edges of the cake before inverting onto a plate. Serve with additional chopped banana and honey drizzled on top (optional).

Notes

If you want to unmold the mug cake onto a plate rather than eating directly out of the mug, mix the batter in a separate bowl rather than in the mug itself. Grease the mug before adding batter to the mug.

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  1. Tatiana says

    August 08, 2019 at 1:24 pm

    mug cake awesome idea never heard of such a thing how cool prefect for a little treat when you want it

    Reply
  2. Lizzy says

    August 08, 2019 at 6:04 pm

    What's better than a cake you don't have to share? Love the flavors in this mug cake!

    Reply
    • Paula says

      June 17, 2021 at 8:28 pm

      Calories?

      Reply
      • Kate says

        June 19, 2021 at 1:26 pm

        Hi Paula, thank you for your question - I did a calculation of the calories using myfitnesspal, it came out to be 558 calories (but this is just an estimate). I hope this is helpful; one of my goals for this year is to add nutrition information to all of the recipes on my site, so stay tuned for that! If you end up trying the mug cake I hope you like it! ๐Ÿ™‚

        Reply
  3. Nicoletta says

    August 09, 2019 at 1:25 am

    I have never made a mug cake, but I have to say it looks delicious! Peanut butter, honey, banana. What's not to like?

    Reply
  4. Kylee says

    August 09, 2019 at 2:35 pm

    This is perfect for me! I need a snack right now - and can totally get behind this idea. Plus, I don't have to share = win.

    Reply
  5. Lori | The Kitchen Whisperer says

    August 10, 2019 at 12:27 pm

    Mug cakes are my bffs when my husband is gone for the night and I have the house to myself! This looks so delicious!

    Reply
  6. Amy says

    August 10, 2019 at 4:57 pm

    This looks fantastic! I love combining peanut butter and banana! I canโ€™t wait to make this for my kiddosโ€”they are going to love it. Thanks for the recipe!

    Reply
  7. Jacqueline Debono says

    August 11, 2019 at 6:05 am

    I've never made mug cakes but am dying to try this one out. I love the idea of individual portion cakes and the banana, peanut butter and honey combo sounds scrumptious!

    Reply
  8. Anne Lawton says

    August 11, 2019 at 11:13 am

    This is such a great idea for a quick and easy dessert!

    Reply
  9. Rebecca Blackwell says

    August 11, 2019 at 1:20 pm

    My teenage daughter is our family's mug-cake-making queen. I showed her this recipe about 15 minutes ago, and we are currently sharing one of these yummy cakes now. ๐Ÿ™‚ Thank you so much for a great recipe!

    Reply
  10. Jessica (Swanky Recipes) says

    August 11, 2019 at 3:38 pm

    I've always wondered how to make a serving or two of cake at a time. Most times, I want an instant treat to satisfy a sweet tooth but I don't need a whole loaf pan around. This is perfect when I'm craving it late at night or when the hubby is out of town.

    Reply
  11. Linda says

    August 11, 2019 at 6:53 pm

    I love mug cake and this version sounds better with a combination of peanut butter and banana. Elvis style, but better!

    Reply
  12. Michele says

    August 11, 2019 at 9:00 pm

    I love desserts you can make in a mug! This flavor combo has me craving peanut butter and bananas right now. Delish!

    Reply
  13. Molly says

    February 05, 2020 at 4:44 am

    Thanks for the inspo! I added dark choc pieces, it rocked in an Elvis manner ?

    Reply
    • Kate says

      February 05, 2020 at 10:57 am

      That's awesome Molly thanks for sharing! Adding dark chocolate sounds amazing I will try that for sure! ๐Ÿ™‚

      Reply
  14. hannah says

    May 08, 2020 at 10:28 am

    this is so good i added some chopped almonds into the batter too

    Reply
    • Kate says

      May 08, 2020 at 1:08 pm

      Oooh that sounds delicious, to add some extra crunch I love it! Will have to try that next time ๐Ÿ™‚

      Reply
  15. Angel says

    May 27, 2020 at 1:37 am

    My wife absolutely loved this! Definitely will make this regularly to use up over-ripened bananas.

    Reply
    • Kate says

      May 27, 2020 at 9:56 am

      Thank you Angel for sharing, I'm so glad your wife enjoyed the recipe! I always have at least overripe banana in my fruit bowl but usually not enough for a whole banana bread, so this would be a good use for those!

      Reply
  16. Julie says

    May 31, 2020 at 1:32 am

    Overall very good. Next time I'll double the batter and not put the bananas in. I prefer them to not be hot and mooshy. I also added cinnamon to the batter and sprinkled it over the top after I plated it. Yummy!

    Reply
    • Kate says

      May 31, 2020 at 12:47 pm

      I'm glad you liked the mug cake Julie, and thanks for the suggestion to add cinnamon, that sounds delicious! ๐Ÿ™‚

      Reply
  17. Melinda says

    June 23, 2021 at 2:42 am

    I love this ingredient combo, so I was so excited to try this! The result turned out a little more cake-y than I prefer, but the taste was nice overall and the honey peanut butter filling was a delicioussss idea!

    Reply
    • Kate says

      June 23, 2021 at 10:29 am

      Thank you Melinda, I'm glad you enjoyed the mug cake! ๐Ÿ™‚

      Reply
  18. Ella says

    March 30, 2024 at 8:47 pm

    I started making this recipe last week and it is SO good. I add cinnamon as well because I think it works well with the other ingredients (and I adore cinnamon).

    Thank you for such a wonderful recipe!

    Reply
    • Kate says

      April 02, 2024 at 9:41 am

      Aw Ella your comment made my day, I am delighted that you enjoyed the mug cake recipe. This flavor combo is one of my favorites as well. And I think cinnamon sounds like a wonderful addition! If you really like cinnamon, I suggest you check out my recipe for cinnamon muffins as well!

      Reply
  19. Kyley M says

    August 08, 2024 at 2:47 am

    Very good definitely recommend trying- especially for midnight snack!!!

    Reply
    • Kate says

      August 12, 2024 at 12:46 pm

      Thank you Kyley I'm very happy that you like the mug cake ๐Ÿ™‚

      Reply
author Kate holding mug

Hi there, I'm Kate!

I create quick and easy recipes for people who like to cook but are short on time and energy (like me!). I love comfort food, family recipes, and anything with cheese.

More about me

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