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Gooey White Chocolate Fluffernutter Cake Bars

Ahhh, summer is officially here which means more fun time to cook with the kids. My Gooey cake bars are so simple (not to mention ridiculously delish) and the kids absolutely love to get their hands dirty to help with this one.

My favorite part about these bars is the gooey fluffernutter topping, its almost caramel like consistency which makes for a perfect gooey treat. They travel well so they’re perfect for bake sales, family picnics and parties.

Whatcha waiting for, get baking! PS, if you can even believe it my kids are still in school! …no pics of them helping me until after this week, lol!

Line up: Yellow cake mix, egg, butter, marshmallow creme, peanut butter, sweetened condensed milk and white chocolate chips.


Add your cake mix to a large bowl.


Add a pretty little egg.


…and a softened stick of butter.


Mix, mix and mix. You can do this with your stand mixer or use your hands to get a dough like this.


Press into a 9×13 inch baking pan. I like lining with foil so after it cools, I can pull the whole sheet out and cut into perfect little squares. Do you like my Sally Hansen sticker nails?! Lol. I like them but do not like that they only last about 4 days ๐Ÿ™‚ย  Cute though!


Press evenly throughout.


Time for the gooey fluffernutter topping. Place your peanut butter, marshmallow creme and sweetened condensed milk into a large bowl, mixing to combine. This is what turns caramel-like once baked. Mmmmm!

Pour it over your pressed crust. Definitely lick the spoon, it’s worth it ๐Ÿ™‚


Pourย  a nice bag of white chocolate chips over top and bake 350 degrees F. for 23-25 minutes. Let cool completely and….

What you’ll find are these gooey bars of deliciousness! Perfect for any occasion, Enjoy friends!


Gooey White Chocolate Fluffernutter Cake Bars

1 box Yellow Cake Mix 

1 large egg

8 tablespoons (1 stick) unsalted butter, softened

1/2 cup creamy peanut butter

1/2 cup marshmallow creme

14 ounce can sweetened condensed milk

12 ounce bag white chocolate chips

1. Preheat oven to 350 degrees F. and line a 9×13 inch baking dish with foil and spray with cooking spray.

1. Place cake mix, egg, and butter into a large bowl. Mix until well combined, will be the consistency of thick cookie dough. I used my hands towards the ends. Press dough into prepared baking pan.

2. Place peanut butter, marshmallow creme and condensed milk into a large bowl and mix until well combined. Pour over crust then top with white chips. Bake for 23-25 minutes, until cooked through. Center will seem somewhat jiggly, but will set up while cools.

3. Let cool completely, cut into squares and serve.

Makes 12 bars



Have a great rest of your week and weekend! Come back soon ๐Ÿ™‚

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108 Responses | Comments RSS

  1. 1
    Kathryn says:

    Oh my goodness, this lookd like a proper sugar overload! Love it!

  2. 2

    Be still my beating heart. Such a simple dessert – I’m so saving this for when I need an emergency picnic dish!

  3. 3

    Jenny..AMAZING!!! I love your desserts. Your creations are always brilliant!! You take common ingredients/items but prepare them in SUCH an ultra delicious way…seriously, the way your brain works is a beautiful thing ๐Ÿ™‚

    And marshmallows, PB, powdered sugar, white choc chips….are some of my FAVE things to bake with.

    Love the pics and this recipe!!!

  4. 4

    These look crazy good and I love your nail polish:-)

  5. 5

    Mmm, you sure know how to jazz up a cake mix, Jenny! These look great.

    School is still in session here in NY, too. I think this is their last week, though. Poor kids!

  6. 6

    Bar is raised high with your gooey bars….i want some! NOW

  7. 7

    LOVE your fancy nail polish! the sparkles are so cute…not to mention this cake bars sound insane!

  8. 8
  9. 9
    Kayola says:

    OHHHHH MY STARS!!!! I have to make these…THANK YOU!!!!!

  10. 10
    Melanie says:

    I’ve heard so much about this mystical thing called “fluffernutter.” I can’t wait to try this!! Sounds like a great combination!

  11. 11

    Hi Jenny! love the bars and the sparkle nails! Let’s get together soon, I miss you ๐Ÿ™‚

  12. 12
    EHochstein says:

    This is exactly what I need for our daughter’s preschool graduation picnic. My daughter is allergic to chocolate. I was looking for a recipe using white chocolate which she loves. Thanks….it looks delicious!

  13. 13
    EHochstein says:

    The peanut butter looks gooey already? Is it the brand/type or did you heat it up somewhat to get to that consistency? Thank you! I’m going to give these a trial run today ๐Ÿ™‚

  14. 14
    Sarah says:

    When I was younger, I would ONLY eat fluffernutter sandwiches for lunch… I love packing them to bring to work from time to time. These are adorable and will definitely be making their way into my baked-good-repitoire

  15. 15

    Yum! Here is my “When I was younger” story ๐Ÿ™‚

    My Dad is a huge fluffernutter fan. When I was a little boy he used to make them as a special dessert treat in the summer. He hasn’t made them in years. Maybe I’ll make them and surprise him.

  16. 16

    This looks incredible!! I can’t wait to try this ๐Ÿ™‚

  17. 17
    Erin says:

    These look superb! I haven’t made anything fluffernutter-ish yet. Gotta start somewhere! P.S. I love your nailpolish.

  18. 18
    Heather I. says:

    Your creativity will never cease to amaze me! Fluffernutter sammies are one of my favs, I can’t wait to make this cake mix version!

  19. 19

    What a fun easy dessert! You do such yummy things with those cake mixes!

  20. 20

    Mmm, those look delicious. I love the fluffernutter layer. Awesome!

  21. 21

    My roommates and I used to make fluffernutter sandwiches in college all the time…they would love this! Can’t wait to make them!

  22. 22

    Okay there’s definitely no calories in this dessert! ๐Ÿ™‚

  23. 23

    First off, I love your sparkly nail polish!
    And I want a pan of these bars right now to get rid of my aching sweet tooth!

  24. 24
    Clare says:

    LOVE love love your nails and that cake! SUCH a bummer that your kids are still in school – what’s up with that? I got out almost two weeks ago!

  25. 25
    Tara Lynn says:

    This recipe looks AMAZING! And it looks like I need to try it…soon.

  26. 26
    Rose says:

    YUMMY !!!!!
    love your nail polish ๐Ÿ™‚

  27. 27

    Alright, this look so darn delicious! I’m all about gooey marshmallow peanut butter mixture. Might have to take this one camping next week for all the little ones running around ๐Ÿ™‚

  28. 28
    Monica says:

    This one got my heart racing, it has all the things I love: cake, marshmallows, peanut butter, white chocolate…!!!

  29. 29
    Amanda says:

    Girl, your talent simply amazes me!! These look absolutely incredible. And I love your cute sparkly nails! ๐Ÿ™‚ xoxo

  30. 30
    ellen says:

    The name alone sounds scrumptious! I gots to try this!

  31. 31

    Love these! So yummy! Love your cute, sparkly nails too ๐Ÿ™‚

  32. 32
    Stacy says:

    Wrong. Wrong, wrong, wrong on so many levels. Yet they taste so right. *thanks* for making it so necessary to hit the gym a little bit harder today! ๐Ÿ™‚ Yummy!!

  33. 33
    Becky says:

    Look amazing! Except that my son is deathly allergic to peanuts!! I’m still going to try them but using peanut-free almond butter. Any suggestions to make that successful? This will be my first recipe trying to substitute almond butter.

  34. 34
    Kristin says:

    Oh yum! these remind me of Paula Dean’s gooey butter cakes. Love the fluffernutter combo, great idea! I’ve tried the sally hansen nail strips too, I really like them I bought leopard print. Mine lasted over a week though.

  35. 35

    Oh. My. Goodness. I am SOOO trying those!

  36. 36

    These look simply divine. Thanks for sharing all your yummy recipes!

  37. 37

    Yum! I’m adding white chips and marshmellow creme to my grocery list.

  38. 38
    Maria says:

    I love bar treats and these look great!

  39. 39
    Donna says:

    Small can of Sweet Cond. Milk? Actual ounce Size?- there were 3 different sizes on the grocery shelf.

  40. 40
    Melanie says:

    Made these last night with my daughter and my oh my they are amazing!!!!!! Love your recipes

  41. 41

    Love your fun nail polish!

  42. 42

    Ahhhhh, white chocolate during the summer. So awesome! It’s nice to have some light flavors that don’t weigh you down.AND there’s peanut butter, so I’m officially won over.

    By the way, your nails are so cute.

  43. 43

    Just got back from walmart, picked up the things i need. I’m resisting the urge to make these RIGHT NOW. LOL. I’m going to make them for a family reunion tomorrow. I know if i make them now, I’ll probably eat them all. LOL. Thank you! My mom and I are totally addicted to your blog! You have been our “go to gal” for great new recipes that are sure to wow a crowd!


  44. 44
    Tracy says:

    These are so fun! Also, your sparkly nails are the cutest. ๐Ÿ˜‰

  45. 45
    Kayla says:

    The recipe calls for unsalted, but I think the butter shown is salted? Yes, no? Will it change the consistency or just taste?

  46. 46
    Melissa says:

    My daughter loves fluffernutter sandwiches…I just made these for a pool party she is hosting this weekend. They are very yummy!!

  47. 47

    HEAVENLY! You have outdone yourself.

  48. 48
    danielle says:

    Yum! I cant wait to try this. I wanted to let you know that I featured this recipe in my “What I Bookmarked This Week” post today – stop by and see.

  49. 49
    Lot-O-Choc says:

    These look so amazingly good! Would love to try one!

  50. 50

    I’ll bet your kids loved these – really, what kid wouldn’t?

  51. 51

    Oh, good Heavens, Jenny! These look fantastic! I’m in charge of teacher appreciation this month at church – I need a special something for them tomorrow & I just found what it will be! Thanks for your post!

  52. 52
    Chaya says:

    I love your creativity and how you turned a relatively easy recipe into something spectacular. I know you are busy but if you could, please link this to Bake with Bizzy. I know, I want to make this and I am sure, many others do, as well.

  53. 53

    These look absolutely sinful. I’m loving it.

  54. 54
    Taylor says:

    Wow, these look amazing! I will definitely have to try these!

  55. 55
    Shaina says:

    So much fun! These would be great for a 4th of July picnic!

  56. 56
    Mads says:

    Mmmm sweetened condensed milk makes everything better. And who can pass up fluffernutter?!?

  57. 57
    Mrs. L says:

    I’m pretty much addicted to anything that is “gooey cake bars”, but this? This is just over the top and I can’t wait to make them!

  58. 58
    Lindsay says:

    Yum! I just made these with a few changes. I halved the recipe in a square pan (still used 1 egg). I used chocolate cake mix and chocolate chips because that’s what I had on hand. I think next time it would be good to add some PB chips, too. Thanks for the great recipe!

  59. 59

    Made these last night – fantastic. I didn’t realize the PB/mallow mixture would stay so soft, so they were a little messier than I anticipated, but they were still delicious! Shared them with 2 different neighbors and got thumbs up all around!

  60. 60

    […] to relax – baking. I wanted to make a special treat to take to work tomorrow so I headed toย Picky Palateย – my favorite blog to find yummy dessert ideas. ย I ended up baking theseย Gooey White Chocolate […]

  61. 61
    Monica says:

    Hi Jenny – I made these last weekend for a BBQ and they were a HUGE hit! Needless to say, you have many new fans ๐Ÿ™‚ Thanks for the great recipe.

  62. 62
    Tracy says:

    I am planning on making these for a BBQ on Sunday. How far in advance is it safe to make them? I was planning on doing them tonight, since I have time and I’m baking something else for tomorrow night. If I keep them air tight in the fridge uncut, will they be okay for Sunday? They need to travel in the car about two hours as well. Thanks!

  63. 63
    Carolinachef says:

    I made these the other day and, although tasty, they did not set up well at all. I also ended up with twice as much as the recipe said I would. I am not sure if I did something wrong or if the recipe just didn’t work as planned. I’ll try again though, but maybe with a shortbread crust instead of the cake.

  64. 64
    Tom says:

    Made these twice to take to 2 BBQs over 4th of July weekend and they were amazing! Your instructions were perfect and they came out looking exactly like your pics. A huge hit with young and old alike! Thank you thank you thank you!!!

  65. 65
    Cheryl Kelley says:

    These were a big hit in our house! My 9 y.o. suggested that next time, we should use a chocolate cake mix and substitute Nutella for the peanut butter and see how it tastes! I think he is on to something!

  66. 66
    Lauren says:

    Holy cow these are good! Thanks for the simple and delicious recipe!

  67. 67

    […] Gooey White Choc Fluffernutter Cake Bars […]

  68. 68
    jessie says:

    i just made these the other day and they were awesome! thanks so much for all the great recipes ๐Ÿ™‚

  69. 69

    […] Gooey White Chocolate Fluffernutter Cake Bars From Picky Palate […]

  70. 70

    I have these in the oven right now… I didn’t have any white chocolate chips so I substituted peanut butter chips… I hope they turn out okay.

  71. 71
    Amanda says:

    I made these last night. The recipe was perfect and they are so, so good! I cut off the edges before making pretty squares, and am enjoying the crusts with my morning coffee.

  72. 72

    […] we baked!ย  We baked brownies from a mix (don’t judge), these, and […]

  73. 73
    Kim says:

    Thank you so much for your wonderful ideas… I made this tonight, I made a couple changes (added chunky peanut butter and butterscotch chips) and it was awesome… Thanks again for all the great recipes you post, my neighbors thank you too ๐Ÿ™‚

  74. 74

    […] is his.ย  To our great delight, he came across this delectable and incrediblyย simple recipe:ย  Gooey White Chocolate Fluffernutter Cake Bars.ย  Can you guess what happened next?ย  Yes!ย  We raced to the grocery store, got the ingredients, […]

  75. 75
    Sharalee says:

    These are amazing!! I love peanut butter fudge and the center of these bars tastes just like fudge.

  76. 76
    Lori says:

    I made these last night and they were a HIT at our house! My dd (11) who doesn’t like sweet treats asked for seconds. 6 out of 6 LOVED them!! Thank you! I didn’t have a cake mix on hand (unusual for me…) so I used my go-to recipe for a yellow cake mix:
    2 cups cake flour (I have used all purpose flour and it has worked)
    2 1/2 teaspoons baking powder
    1 teaspoon salt
    1 1/4 cups sugar
    1/2 cup vegetable shortening (I only use Crisco)

    Thank you for a new favorite dessert for my family!! ๐Ÿ™‚

  77. 77
    Kelli says:

    Wow these babies are rich! Almost like a soft fudge on top.

  78. 78

    OHMYGAHHH these are so good! My family is going crazy for them.. I made them this afternoon and they want another batch made for tomorrow!

  79. 79

    […] Picky Palateโ€™s Gooey White Chocolate Fluffernutter Cake Bars: […]

  80. 80
    Megan Lapke says:

    This is what I’m ALWAYS craving for dessert. Thanks so much!!!

  81. 81

    I commented before, but I have to update you..
    These are my 86 year old grandpa’s favorite dessert HANDS DOWN.
    (And we’re trying to get him to put on weight, so honestly.. this recipe is a blessing!)
    It’s adorable, he truly loves them. I’m making my third batch now!
    Thank you thank you for such a delicious recipe!

  82. 82

    […] that they wanted blondies so I set out looking for a new recipe to try. I came across a recipe for Fluffernutter Cake Bars and they seemed perfect. But I didn’t feel like making a trip to the store so I altered the […]

  83. 83

    […] Girl Scout cookie cake bars. You’ve seen Jenny’s fabulous cake bars before right? Her Gooey White Chocolate Fluffernutter Cake Bars are life changing. One of my top 5 favorite desserts of all time, hands down. They must be made […]

  84. 84
    Shephalli says:

    The recipe looks amazing. Question – can i skip the peanut butter for people that are allergic? What should i replace it with instead?

  85. 85
    tz7568 says:

    You could use any flavor of came mix do you think?

  86. 86
    Lori says:

    I LOVED this sandwich as a child. Could not get enough of it.

  87. 87
  88. 88

    […] Gooey White Chocolate Fluffernutter Cake Bars by Picky-Palette […]

  89. 89
    Maddy says:

    What do I do if I have no marshmallow cream?

  90. 90
    Brittany says:

    my husband and i are waiting for these to cool right now. I’m tempted to just grab a fork right now lolol

    thanks for the deelish recipe ๐Ÿ™‚

  91. 91
    Julie Thoren says:

    I use chopped Reese’s Peanut Butter Cups instead of the white chocolate chips on top and it is AMAZING!!

  92. 92

    […] Gooey White Chocolate Fluffernutter Cake Bars 1 box Yellow Cake Mix 1 large egg 8 tablespoons (1 stick) unsalted butter, softened 1/2 cup creamy peanut butter 1/2 cup marshmallow creme 14 ounce can sweetened condensed milk 12 ounce bag white chocolate chips 1. Preheat oven to 350 degrees F. and line a 9×13 inch baking …Recipe link:… […]

  93. 93

    […] Gooey White Chocolate Fluffernutter Cake Bars from Picky Palate […]

  94. 94
    Sue says:

    My Grandson made this yesterday. Very rich,but very good didn’t last long.

Jenny Flake

Welcome to Picky Palate, my online kitchen! You'll usually find me with a cookie in one hand and a salad in the other. It's all about the balance :) The recipes you'll see are my creations. The Picky Palate Cookbook is now available. Enjoy!