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Keto Gooey Butter Cake

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St. Louis Gooey Butter Cake gets a keto makeover! This easy cake recipe is rich and incredibly buttery, but still low carb enough to fit into your healthy keto diet. Sugar free and grain free.

Keto Gooey Butter Cake slice on a wooden table with strawberries in the background

I feel like I have been waiting forever to make a good keto gooey butter cake recipe. I’ve seen so many glorious conventional gooey butter cakes, which really are more like bars than cake, and I kept eyeing them, wondering if I should take a stab at making a healthier, low carb version.

What was stopping me, you ask? Simple. The lack of good low carb boxed vanilla cake mix. The original St. Louis Gooey Butter Cake takes boxed cake mix and when I re-make a recipe, I like to pay homage as much as I can to the original recipe.

But now, with the advent of not one but two really good keto cake mixes on the market, I decided it was time to give it a go. Both Good Dee’s  and Swerve make really good vanilla cake mixes that are perfect for a low carb version of gooey butter cake.

Easy St Louis Gooey Butter Cake in a pan with one piece cut out

What is Gooey Butter Cake?

You have to admit, it’s such a great name, it makes you want to run to your kitchen and make it straight away, doesn’t it? But what exactly IS gooey butter cake? Well I’ve been doing my research on that!

  • It originated in St. Louis, Missouri, and like any traditional recipe, it seems to have many iterations. But generally it’s a flat, dense cake topped with a gooey sweet filling of cream cheese and butter.
  • The cake portion is usually made with boxed cake mix, but you add a lot more butter, fewer eggs, and no additional liquids, so it doesn’t rise much but stays dense and buttery.
  • The filling is made by beating cream cheese, butter, eggs, and powdered sugar (or sweetener) together and pouring it over top. Then it’s baked just enough so that the topping stays ooey and gooey.
  • You then sprinkle it with a liberal amount of powdered sweetener/sugar.
  • It’s also often baked in 9×13 pans and cut into squares, so you may see it referred to as gooey butter bars.

Sounds pretty good, doesn’t it?

Pieces of keto gooey butter cake on a stack on a white cake stand

How to Make Keto Gooey Butter Cake

I tried several different versions of this cake so I could give you some options.

The first time I made it, I used the Swerve Vanilla Cake mix for the crust, and simply followed the rest of the recipe I found on the Tidy Mom blog, swapping powdered Swerve for the sugar. Cheryl is actually from St. Louis and I figured she knew what she was talking about!

I took that version to the Oregon Coast when we went away with friends and it was a huge hit.

But knowing that not everyone wants to use, or can afford, the keto cake mixes, I decided to also make it with one of my own basic keto vanilla cake recipes. I did cut the amounts back by one third so it wasn’t too much cake and not enough filling.

I also tried adding some butter to the filling on the second go, to make it more gooey. I’d seen several variations with the added butter and given how much I love butter, I figured it couldn’t be a bad thing.

A fork going into a piece of keto gooey butter cake on a white plate

That version got taken to CrossFit, where it was also a huge hit. But they are hungry people, those crazy CrossFitters.

As I said, you have options here. You could make it with boxed cake mix or with my vanilla cake. But I highly recommend the added butter in the filling. Because low carb sweeteners aren’t like sugar, the filling is more firm when it’s just cream cheese and eggs. Sugar keeps things softer, so the additional butter really helps this keto version.

If you truly want a gooey butter cake, make sure to under-bake it. Don’t wait for that filling to firm up, take it out of the oven while the center is still quite jiggly.

That’s really it! It’s a remarkably easy cake, whether you use boxed cake mix or not. And with these low carb ingredients, how can you go wrong?

Want more gooey dessert recipes? Check out my Keto Desserts Page!

4.96 from 25 votes
A fork going into a piece of keto gooey butter cake on a white plate
Print
Keto Gooey Butter Cake
Prep Time
15 mins
Cook Time
40 mins
Total Time
55 mins
 

St. Louis Gooey Butter Cake gets a keto makeover! This easy cake is rich and incredibly buttery, but still low carb enough to fit into your healthy keto diet. Sugar free and grain free.

Course: Dessert
Cuisine: American
Keyword: gooey butter cake, gooey butter cake recipe
Servings: 15 servings
Calories: 268 kcal
Ingredients
Cake:
Filling:
  • 8 ounces cream cheese softened
  • 1/2 cup butter softened
  • 3/4 cup powdered Swerve
  • 2 large eggs
  • 1/2 tsp vanilla extract
  • Powdered Swerve for dusting
Instructions

  1. Preheat the oven to 325F and lightly grease a 9x13 baking pan.

  2. In a large bowl, combine the almond flour, sweetener, protein powder, baking powder, and salt. Add the butter, egg, and vanilla extract and stir to combine well. Press into the bottom and partway up the sides of the prepared baking pan. 

  3. In another large bowl, beat the cream cheese and butter together until smooth. Beat in the sweetener until well combined, then beat in the eggs and vanilla until smooth.

  4. Pour the filling over the crust. Bake 35 to 45 minutes, until the filling is mostly set, but the center still jiggles, and the edges are just golden brown. 

  5. Remove and let cool, then dust with powdered Swerve and cut into bars. 

Recipe Notes

To make this with keto boxed cake mix (Swerve or Good Dee's), simply mix the cake mix with 1 egg and 1/2 cup melted butter. Then press the crust into the pan and follow the filling directions. 

Nutrition Facts
Keto Gooey Butter Cake
Amount Per Serving (1 serving = 1/15th of cake)
Calories 268 Calories from Fat 218
% Daily Value*
Fat 24.2g37%
Carbohydrates 4.2g1%
Fiber 1.6g6%
Protein 6.1g12%
* Percent Daily Values are based on a 2000 calorie diet.

Nutritional Disclaimer

Please note that I am not a medical or nutritional professional. I am simply recounting and sharing my own experiences on this blog. Nothing I express here should be taken as medical advice and you should consult with your doctor before starting any diet or exercise program. I provide nutritional information for my recipes simply as a courtesy to my readers. It is calculated using MacGourmet software and I remove erythritol from the final carb count and net carb count, as it does not affect my own blood glucose levels. I do my best to be as accurate as possible but you should independently calculate nutritional information on your own before relying on them. I expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website.

Reader Interactions

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Comments

  2. Hi, Carolyn. My son loves this cake. I’m so happy to have a Keto version. Thank you. Do you use salted or unsalted butter?

    Reply

  4. 5 stars
    Thank you for this recipe, Carolyn! After living away from St. Louis (and Gooey Butter Cake!) for thirty years,
    I’ve happily returned to St. Louis. Now I’ve decided to go Keto and I can’t eat a Gooey Butter Cake! So this is
    really a welcome recipe! I can’t wait to make it! Thanks for all of your delicious recipes! I’m quite sure this one will measure up!

    Reply

  5. Oh Carolyn, you have made me so happy! This is one of my favorite desserts and I have been wanting a keto sub for ages. Cannot wait to try! Thank you!

    Reply

  6. This coudn’t have come at a better time for me! I love gooey pumpkin butter cake at Halloween and now I don’t have to cheat!! You mentioned extra butter did you already include that in this recipe? If not, how much extra should I include. Thanks so much for all you do.

    Reply

  8. Wow. I’ve email you twice over the years about this cake! And as recently as last week asking you to help me out. I’m sure you didn’t see it, but it was well timed. It sounds like all I needed was two eggs to fix the recipe! Thanks!

    Reply

    • Oh I am sure I have seen, you are definitely not the only one to ask for this cake. 🙂 Did I not respond? I try to respond to almost all of my emails and requests but it gets overwhelming. Often I just try to answer specific baking questions. But I had never made one before and needed to do my research so I may have been putting you off until I had done so. Sorry!

      Reply

      • No worries! I was the crazy lady asking if I could mail you the real deal so you could taste it once and see why it’s so darn good! I know you are super busy and answering all that can take forever.I was not upset, sorry if my internet tone seemed so! I’ve made many a crystallized gooey butter cakes over the years lol. I’m so excited to bake this tonight and see. I’ve been so close so many times but that darn swerve would crystallize the next day or if it was put in the fridge. We always left real STL gooey cake on the counter for a few days…do you think this guy could do that too? I was about to try Bocha sweet next week in it but I’ll swerve it one more time! Thanks so much!

        Reply

        • Ours was totally on the counter for a few days. Mine never recrystallized but again, we ate it within a few days (or some I took to CrossFit) so I can’t promise you it’s not going to happen. But using powdered Swerve in the filling should help. If you do get Bocha Sweet, try using half that and half powdered Swerve.

          Reply

          • 5 stars
            I had this same question but also, love the flavor of this, but it completely stuck to the glass 13×9 pan! There’s just no way I can keep a piece together. I know I’m not explaining well, but the crust is moist and just not set…but done around the edges and the filling done perfectly! Help!

          • Well that’s a bit odd because no one has had an issue with it sticking. What kind of 9×13 pan? If it was metal, that could be part of it. What did you use for the cake part…my recipe or the swerve mix?

  15. Just whipped this up and popped it into the oven. I licked the beaters clean! So yummy!! I can’t wait until after dinner to have some! Thanks!

    Reply

  16. 5 stars
    Carolyn – I got my grandmother’s Gooey Buttercake recipe out and yours is almost identical. Except for one small detail – the original recipe calls for a yellow cake mix that makes two 8in rounds. The swerve cake mixes only make one 8in round. So to duplicate the real McCoy, you will want to use 2 cake mixes. I only had a vanilla and a chocolate so I made both, split the filling into two bowls so I could add 4oz of melted Lily’s chocolate into one. Then I made a 1/2 and 1/2. I’ll post a pic on the facebook post when it is out of the oven.

    Reply

    • Hi Jennifer… be that as it may, I worked from other “traditional” recipes and used exactly the same amount of cake mix as they did. I would definitely not try to do a larger cake mix, I think it would be too heavy on the cake.

      Reply

      • I’ll let you know how it turns out – the original recipe was never a 50/50 cake and filling. It was mostly cake with a layer of filling. At least that is the way my family has made it for 4 generations. In St. Louis… 😉

        Reply

    • I honestly can’t guide you here, I don’t use it. When I tried it in the past, it was much much more dry than almond flour so it would not be a great sub here.

      Reply

  20. Actually, the story in my family is that my grandfather was the inventor of the St. Louis Gooey Butter Cake. I think it was back in the 30’s or 40’s. He owned 2 bakeries. And the gooey butter cake was an accident. Apparently he was trying a new recipe and it kept flopping, the butter all sunk to the center of the cake. Times being what they were,(no wasting) the flopped cakes were put out on a sale rack, and ended up being a hit. People would line up to get the cakes. Not sure what happened, but the story is he was approached by someone to sell the recipe. My grandpa was not a businessman, so he sold it to this guy who ended up selling it to Kroger for a fortune.

    I remember those cakes when I was a kid, always leftover baked goods at my grandparents house. We would eat the gooey center and leave the crust, haha.

    Reply

    • Hi – if you’re asking because of dairy intolerance, there are vegan cream cheese alternatives but as I’ve never used them can’t say how they’ll behave in a baked good such as this – you’ll just have to try it. (Miyokos and Follow Your Heart are the brands I’ve heard of, Btw).

      Reply

  22. Hi Carolyn,
    Thanks for a Low Carb, Keto version of Gooey Butter Cake!
    I grew up in St. Louis and still live in the surrounding area. I grew up eating Gooey Butter Cake made the original way and have great memories of going to our local bakery to pick it up. Eventually a version was sold in local grocery stores, but the best came from the bakery!
    I have made the version using cream cheese and cake mix, as have many, but it doesn’t compare to the original, which isn’t made with Cream Cheese and has a yeast based crust.
    A year or two ago, I decided to see if I could find a recipe for the original version and found a few. The original recipe has a yeast based crust and uses sugar and corn syrup in the topping. I found each varies slightly in amounts used, but are similar to the ones I grew up with. We can still buy a version of the original one in our stores, but they now sell the cream cheese version too, which taste sweeter and more gooey than the original.
    Thanks again!

    Reply

  23. 5 stars
    As a St. Louis native (in Detroit) gone Keto, I have 3 things to say.
    1. I love you. I honestly love you.
    2. Let me know if you work out toasted Rav’s.
    3. Seriously, I love you so much.

    Reply

  24. I made your butter cake and it was good. It has some slight cooling effect from the Swerve. Is there a method to eliminate the cooling effect? Is there a way to make the Butter cake into a Rum Cake? Could I use Rum and not Rum Extract? If so, what would the measurement be for the Rum. If I had to use Rum extract, how much would I add? I bought your new Holiday cookbook and am looking forward to baking with it. Thanks so much, Bernadette

    Reply

    • Many people find that a combination of sweeteners, like Swerve and stevia, help the cooling sensation. i don’t get it at all. Not sure how much rum but feel free to replace some or most of the liquid! have fun with it.

      Reply

  25. 5 stars
    I made this tonight. It’s really good except I misread and only put 1/2 c. Of swerve in the filling so it wasn’t sweet enough for me. But still great!

    Did you use powdered swerve for the crust and filling? I wasn’t sure…I did use it for both.

    Thanks for the awesome recipe !

    Reply

    • Hi Stacy… when I write just “Swerve” it means granular. But in this recipe, it really wouldn’t matter that much.

      Reply

  26. 5 stars
    I just made this cake even though I’ve never tasted the original. The cake came out great and is delicious. Approved by even the non Keto members-aka harsh critics in my family.
    It’s definitely a keeper. While this was my first recipe from your site, it certainly won’t the last!
    Thanks!
    Apurva

    Reply

  27. 5 stars
    Hi! This looks amazing and I can’t wait to try it! Have you, it any of your readers, ever tried adding lemon to this yumminess? If so, how’d it go? Thanks for the recipe!!!

    Reply

    • I do believe a few readers have. Lemon zest has lots of great flavor so I’d do the zest of one lemon plus maybe a teaspoon of lemon extract.

      Reply

      • 5 stars
        My exact thought! I will add lemon zest next time, St Louis native who made original gooey butter cake for most every family occasion for the last 40 years, until we went wheat free. Now Keto and this is divinely welcomed😍

        Reply

  29. 5 stars
    Just made this. It was delicious! I couldn’t even wait for it to cool all the way down before digging in. It was so quick and easy. I’ll definitely be making again!

    Reply

  31. 5 stars
    Oh My! This might actually push your Sour Cream Lemon Pie off the top of my favorites list! So good and it really was a very simple recipe! Miranda at The Reluctant Cowgirl:)

    Reply

  32. 5 stars
    This is by far THE best Keto dessert I have made to date! I followed the directions to a tee and my husband and I almost fought over the last piece!! That would explain why I’m making another one today! Going to try the pumpkin or maybe lemon additions but the original is fantastic!!!!

    Reply

  34. 5 stars
    I just made it and hubby and I were absolutely delighted with it. The texture of the base is like a delicious cookie and the filling is absolutely heavenly. Even my neighbours (who are not ‘keto’ dieters) loved it. This is a real keeper.

    Reply

  35. I’m not sure how to rate it since I managed to overcook mine a little. The recipe said 35-45 minutes so I thought it as fine setting my timer on 30 min but my oven must have been warmer and it was no longer jiggly in the center. It still tasted good but I’m not sure the texture is what it’s supposed to be according to the recipe. Gooey butter cake wasn’t something I’d ever heard of before this recipe so I have nothing to compare it to but it was easy to make and had a nice mild flavor. If I do this again I’ll keep a closer eye on it around 20-25 minutes.

    Reply

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