Crock Pot Peanut Butter Cup Cake

So this cake happened today.
Like realllly happened.

I started it.
I went to the pool and watched my kids do 40 million cannonballs.
I came home.
And waiting for me was a cake.
In a crock pot.


This is, in fact, real life.
And there are peanut butter cups involved.


Because I love you.
And after you eat this cake you will love me too.

Crock Pot Peanut Butter Cup Cake.
Did you hear me? IN A CROCK POT!

I’m caking like it’s 1983.

Just mix up your ingredients.
And since we’re in the 80’s, let’s start with a cake mix.
PhotobucketThen put it in your crock.
What a crock it is.
PhotobucketAnd wait a bunch of hours.
I suggest you get on with your life during this time.
Watching the crock pot work is a losing battle, folks.

After the longest 6 1/2 hours of our life you should eat.
With ice cream.
Good gosh almighty.


Crock Pot Peanut Butter Cup Cake


  • 1 (18.25 oz) pkg chocolate cake mix
  • 1 1/2 cups sour cream
  • 1/2 cup peanut butter
  • 1 (3 or 4 oz) pkg of instant chocolate pudding mix any size will be fine
  • 1 cup mini peanut butter cups, or 1 cup chopped peanut butter cups
  • 3/4 cup vegetable oil
  • 4 eggs
  • 1 cup water


  1. Spray crock pot with non stick spray. I used my 8 qt crock pot.
  2. Mix all ingredients together and pour in crock.
  3. Cover and cook on low for 6 1/2-7 hours until center is set.
  4. Serve warm with ice cream.


Cook times may vary slightly based on your crock pot…low on some might be higher than on others.
Also, the cake is very loose, more like a pudding-cake.


106 Responses

  1. I’ve seen a couple different crock pot dessert recipes in the past day….all of a sudden, slow cookers in the summer. Hey, whatever it takes to make a fab dessert.

    This looks so gooey and amazing…and wonderful!

  2. Yuuuuuum! The crock pot cake idea is genius anyway but peanut butter chocolate is way better than the yellow cake/strawberry pie filling one I’ve been making!

  3. This looks amazballs! I also love that you have a Ziplist feature right on your site. I plan to make this over the 4th of July for our family reunion (mostly because I am afraid I will eat the entire cake if there are no witnesses).

  4. Jennifer

    If I did not already have some goodies to bring to my Bible Study this Friday I would so be bringing this! I’m looking forward to making it! My two favorite things- chocolate and peanut butter………..and it’s not going to heat the house! YAH!

  5. Okay…. this is the GREATEST! I can’t even begin to imagine what my Friday night will be like tomorrow. Of course, I’m trying to figure out if I can just put it in the crock pot when I get home tonight. Hmm….

  6. o.crap!
    I was telling my boys we can’t make dessert because it’s too hot to use the oven. You have made me a big, stinkin’ liar!
    (Good thing I’ve got a couple crock pots — DINNAH IS SERVED!)

  7. So last week I had to bring my blender to work with me because I’m totally addicted to smoothies. This week, I’m totally bringing my crockpot in and we’re having cake at work!! I can’t wait to try this!!

  8. B.J. Moore

    Year ago when I bought my crock, I bought all the gadgets that went with it and the right cookbook. Bread, cakes (a special pan) and the roasting rack. Ive been using it and updating my recipes ever since.
    One of the best investments I ever made…and still going after 35 years. Cool huh?
    Thanks for a great (my fave flavours) recipe. I’ll be trying this one soon.
    Brenda from Oshawa Ontario.

  9. Heather

    Did this fill up your crock pot? Mine is smaller. . . I just measured it. It’s, gasp, only 3 quarts! Do you think it could handle this recipe? It looks divine. We always need a treat on Sunday afternoons and it’s going to be 100 here this Sunday!

    1. shelly

      I used an 8 qt crock and it filled about half.. I’m not so sure a 3 qt would work, and if it will all fit, you would most likely have to adjust the baking time. Maybe make half the batter?

  10. I have been wanting to buy a crock pot for some time now and this cake just gave me a reason to! It looks so decadent and I love that it takes forever to bake because that just builds the anticipation of it. It is the perfect cake for the summer because you can leave it and go on with your summer fun.

  11. Lori

    OK, I would love this, however my kids are allergic to peanuts. What do you think I could substitute for the peanut butter? (I’m still going to have to try it and will take it to school to share with staff) Thanks!

  12. Carla @ Carla's Confections

    1908’s here I come! What a great idea! Yes please. And mini peanut butter cups?!?! I mean come on! I’m all in for this one! 🙂

  13. And to think, I thought that now that I was a vegetarian my crockpot was essentially useless. You’ve proven me wrong!

    I think the only time I spotted you at BHF was just as you were walking out the door of the closing party to leave…and I just didn’t make it to stall you in time! ACK. Such a fail!

  14. Sharon Chaffee

    Chocolate and Peanut butter?? IN A CROCKPOT??? This is beyond brilliant! And, I live in a house with 2 little boys and 3 chocolate/peanut butter addicted adults…..We’re doomed. But only in the best possible way!!

    Thanks for another doozy, Shelly!

  15. Beth

    Looking forward to having this tomorrow. Sounds like there are lots who haven’t cooked dessert in crock pot…. Just FYI, if you place a towel UNDER the lid, the condensation collects on the towel and doesn’t drip back onto your cake.

  16. I found this on pinterest and I’m making it today because I’m having some gal friends over for dessert – can’t wait! I know the house is going to smell so good!

  17. Want to make this but do i make the cake mix, like a cake mix with the eggs, oil and such and make the pudding with the liquids too? OR do i just add all the ingredients as they are and add them all in and they eventually work it out? HELP!!!

  18. Kelly

    Do you mix the cake mix like making a normal cake? And do you mix the pudding mix with the water like normal or just mix the powder mix with the other ingredients?

  19. Kayla

    I noticed that in the photo the crockpot temperature is set to low. Have you experimented with a higher temperature/shorter cooking time? I want to make it tonight but don’t have 6.5 hours to wait 🙁

  20. Rachel

    Did you ever stir it? I had my crock pot on low and started smelling a burning smell just after two hours… The inside isn’t looking done. I’m not sure if I was suppose to stir here and there or my crock might just be a hotter one.

    1. shelly

      NOpe, no stirring at all! Hope it didn’t burn. Sounds like maybe your crock runs a little hot. The cake will be very “loose” though..more of a pudding cake 🙂

  21. Dana

    Hi I just made this cake and left, ran some errands, went to a movie and came back so excited to eat it! BUT it was burnt all on the outside and we tried the inside but it tastes terrible, nothing like peanut butter cups. Very disappointed :/ I cooked it for 6.5 hours, and followed the ingredient list exactly… Not sure what went wrong but won’t be making this one again.

    1. Aryn

      I made this today. I made it exactly like the recipe said. It cooked on low for 5 1/2 hours and it was burnt on the outside. The consistency was weird and it tasted ok. I was very disappointed and I won’t be making it again.

      1. shelly

        I suppose crock pots temperatures all vary, which probably is the reason for yours burning. Low on one brand, might be higher than the low on another. Sorry it didn’t turn out for you! I’m going to give this another try in a different crock to test. Thanks for the feedback!

  22. Ashley

    Sad to say I made this last night and was really disappointed. It tasted nothing like peanut butter cups and was really oily. I followed the directions exactly , but it just didn’t taste very good. I will not be making it again 🙁

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