I love mug cakes. They are so easy to make and require very little clean-up.  It takes a few minutes to put together and only about 1 minute of cooking time. Whenever I’m craving a sweet treat for one, I turn to a mug cake.

The other day I experimented with some other flavor mug cakes. So far I’ve made nutella chocolate mug cake and chocolate mug cake. I set about trying to make a peanut butter chocolate one.

The cake came out a little bit dryer than I had been expecting and the peanut butter flavor wasn’t intense enough for my personal preference. It was still a tasty cake though and really hit the spot. Next time I think I might not mix the peanut butter into the batter, but instead swirl it in.

Print Print Recipe

Peanut Butter Chocolate Mug Cake

Yield: 1

Prep Time: 5 mins

Cook Time: 1.5 mins

Total Time: 6.5 mins


* 4 tablespoons all purpose flour
* 4 tablespoons white granulated sugar
* 1/4 tsp baking powder
* 1 egg
* 3 tablespoons cocoa powder
* 2 tablespoons peanut butter
* 3 tablespoons milk
* 3 tablespoons melted butter


Combine all ingredients in an oversized mug. Whisk well with a fork until smooth. Microwave on high for about 1 to 1 1/2 minutes. You don’t want to overcook it or it will become rubbery.

adapted from The Family Kitchen


24 Responses to “One Minute Peanut Butter Chocolate Mug Cake”

  1. Matt @ FaveDiets — November 29, 2011 at 7:58 am

    What a cool idea! I’ve never tried making a mug cake before, but it’s hard to go wrong with anything that has cocoa powder and peanut butter in it. Do you think you could use oil instead of melted butter in this recipe?

    • Kirbie replied: — November 29th, 2011 @ 9:26 am

      Hi Matt- I think oil would work. I’ve done other mug cakes that use oil instead of butter so it should be okay.

  2. Judy — December 1, 2011 at 4:12 am

    Looks great and sounds really easy but I don’t envy the person that has to wash that mug. It must stick something awful.

    • Kirbie replied: — December 1st, 2011 @ 9:43 am

      It’s actually not too bad. If you wash it after you are done and use the scrub portion of the sponge it comes off pretty easily.

  3. Rodzilla — December 1, 2011 at 5:00 am

    I do something similar with protein powder and peanut butter – probably doesn’t taste nearly as good though :D

    • Kirbie replied: — December 1st, 2011 @ 9:42 am

      Hmm..I’ve never added protein powder to desserts so I don’t know, but I’m thinking not..

  4. Anna — December 5, 2011 at 10:12 am

    I know that it’s weird but I don’t have a mirowave so I only can use oven. Do you think that it could work?

    • Kirbie replied: — December 5th, 2011 @ 10:59 am

      Hmm, I assume it would work in an oven but the baking time would be different. I’m not sure how it will turn out though

  5. Lianne — January 20, 2012 at 5:02 pm

    This is delicious! I made it and it was just a little undercooked so it was moist and chewy! yum!

    • Kirbie replied: — January 20th, 2012 @ 5:28 pm

      So glad you like it!

  6. LaUrZa87 — July 22, 2012 at 3:04 am

    It didn’t fit in my mug, but it tasted amazing.

    • Kirbie replied: — July 25th, 2012 @ 9:20 am


  7. Karen — September 6, 2012 at 6:31 pm

    This was super easy and very yummy. I didn’t have any milk so I just used water and it came out perfect! So happy I found this site with it’s different takes on the mug cake, will definitely be trying the other variations in the future.

    • Kirbie replied: — September 6th, 2012 @ 9:39 pm

      Glad to know it still works with water!

  8. Alannah — September 14, 2012 at 3:31 am

    I just made this, we didn’t have enough cocoa to put cocoa in it, and we didn’t have baking powder, it works just as well replacing the flour and baking soda with four tablespoons of self raising flour. It is so tasty!

    • Kirbie replied: — September 14th, 2012 @ 8:24 am

      Yay! Yes, self raising flour should work so I’m glad it did

  9. Niaomi — November 8, 2012 at 9:15 pm

    I just made this, minuses the sugar as I’m diabetic and used 3 table spoons of Splenda. I also added a dash of cinamon and vanilla and ate it with a small scoop of sugar free vanilla icecream. Perfect snack!

    • Kirbie replied: — November 9th, 2012 @ 9:27 am

      Yay! Glad you liked it

  10. vicky — January 9, 2013 at 5:02 am

    I put the peanut butter on the bottom instead of in it and it melted all over when fljpped upside down YUMMY!!!!!

    • Kirbie replied: — January 9th, 2013 @ 9:22 am

      Oh interesting. I will have to try that next time.

  11. elisabeth — January 21, 2013 at 5:48 am

    This was fantastic! I added about a quarter teaspoon of vanilla and a pinch of salt, and used half brown sugar and half white. I think next time I may reduce the quantities slightly because it turned out being more like two servings of cake than like one, but it was delicious.

    • Kirbie replied: — January 21st, 2013 @ 9:27 am

      Yeah it’s definitely enough for two people to share! Thanks for letting me know of the tweaks you made.

  12. Terri Taylor — March 30, 2015 at 8:29 pm

    Love the mug cakes! Love peanut butter cake. Here is the dry cake solve: No egg. No butter. 3 tablespoons applesauce, 1 tablespoon oil, 3 tablespoons melted peanut butter. 2 tablespoons packed cocoa powder and 5 tablespoons ap flour. Then follow the rest of your recipe. *spray  inside of coffee mug with non-stick spray and mix batter in small bowl first.*

    • Kirbie replied: — March 31st, 2015 @ 1:34 am

      thanks for sharing. this is actually quite an old recipe. I’ve definitely figured things out since. If you look through my mug cakes category you’ll find my updated recipes where I’ve solved a lot of previous issues.

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