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All Day I Dream About Food

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April 16, 2020

Keto Blueberry Upside Down Cake

This post may contain Amazon or other affiliate links. As an Amazon Associate I earn from qualifying purchases.

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Keto upside down cake is fun, delicious, and easy to make. It’s delicious for dessert, but it also makes a lovely brunch too. This post is sponsored by Pete and Gerry’s Organic Eggs.

Two slices of blueberry upside down cake on white plates on a white table. A blue patterned jug sits in the background.

Upside down cake is kind of brilliant, when you think about it. Place all your delicious toppings at the bottom of the pan, pour cake batter over it, bake, and flip!

Voila, you’ve got a tender keto cake with the sweetness baked right into the top.

While most people associate upside down cake with the pineapple variety, there are plenty of other fun and tasty topping ideas. And some are a little more keto-friendly than others. Blueberries are a great low carb alternative and make for a stunning presentation.

Make this keto blueberry upside down cake and I promise you won’t regret it!

A square keto blueberry upside down cake on a white table.

Great keto cakes start with great eggs

I know I go on and on about this, but the quality of your ingredients really does matter. It matters for the results of your baked goods, but also for your health and the health of the environment.

My go-to is Pete and Gerry’s Organic Eggs. I’ve done my research and they meet all of my concerns and more. The hens have freedom to roam outside and live the way hens are meant to live. The farming practices are humane and sustainable. And the eggs are fresh and of the highest quality.

Top down photo of slices of blueberry upside down cake on a white table, with a blue napkin and a bowl of berries.

How to make blueberry upside down cake

Unlike most cake recipes, you make the topping first, which consists of butter, brown sugar substitute, and blueberries. This creates a wonderful caramelized flavor when the cake is baked.

Be sure to grease your pan well, as the topping can make it stickier and a little tricky to get out of the pan. Then whisk the melted butter and brown sugar replacement together in a bowl and spread over the bottom of the pan.

Next comes the fruit, sprinkled evenly over the butter mixture. Since blueberries are not yet in season in the Pacific Northwest, I used frozen wild blueberries. These smaller blueberries give you great coverage over the bottom of the pan.

Finally, pour the cake batter overtop and spread to the edges, making sure to cover the entire topping. And bake away!

I do recommend flipping the cake out after only 10 to 15 minutes of cooling time. The caramel blueberry topping can harden as it cools, making it more difficult to get out of the pan.

A single slice of keto blueberry upside down cake in front of a carton of eggs and a bowl of blueberries.

How to serve and store keto upside down cake

This lovely blueberry upside down cake makes a wonderful brunch or dessert. We served ours with a dollop of whipped cream on top, and I have to admit, I had a slice for breakfast the next day.

Because of the fruit and the added moisture, this is a cake that should be stored in the fridge. Warm it gently before serving. It could also be frozen for up to a month.

Ready to whip up some Keto Blueberry Upside Down Cake?

Please check out the recipe on Pete and Gerry’s.

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Filed Under: Keto Cakes Tagged With: blueberries

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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.

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    Recipe Rating




  1. nichole malbrough says

    April 16, 2020 at 8:46 am

    Can I use strawberries instead ? I don’t like blueberries.

    Reply
    • Carolyn says

      April 16, 2020 at 8:58 am

      Sure.

      Reply
  2. Vicki Kapraun says

    April 16, 2020 at 9:33 am

    Do you have to use protein powder?

    Reply
    • Carolyn says

      April 16, 2020 at 6:15 pm

      No, but your cake won’t rise as well without it.

      Reply
    • Jessica says

      May 1, 2020 at 6:38 am

      Would collagen powder work instead of whey protein?

      Reply
      • Carolyn says

        May 1, 2020 at 7:20 am

        No, collagen makes baked goods very gummy.

        Reply
  3. Sherry says

    April 16, 2020 at 11:36 am

    Where is the actual recipe?

    Reply
    • Carolyn says

      April 16, 2020 at 12:17 pm

      HUGE link at the bottom of the post.

      Reply
      • Lara says

        January 28, 2021 at 5:56 pm

        I don’t see a link at the bottom

        Reply
  4. Melissa Granger says

    April 16, 2020 at 2:43 pm

    Can I replace the whey protein powder with something else?

    Reply
    • Carolyn says

      April 16, 2020 at 6:13 pm

      Egg white protein will work too.

      Reply
  5. MaryKathryn says

    April 16, 2020 at 8:11 pm

    I made this today, for breakfast tomorrow, but couldn’t wait to try it! It is delicious, just like all of your recipes. Thank you.

    Reply
    • Carolyn says

      April 17, 2020 at 7:57 am

      Glad to hear it!

      Reply
  6. Shanda says

    April 17, 2020 at 10:37 am

    Can I use parchment paper and non-stick spray to help get the cake out?

    Reply
    • Carolyn says

      April 17, 2020 at 1:39 pm

      Sure thing!

      Reply
  7. pdx girl says

    April 17, 2020 at 10:53 am

    Question, if using frozen blueberries do you defrost them first?

    Reply
    • Meryl says

      January 28, 2021 at 1:59 am

      Is there a way to make this non-dairy?

      Reply
      • Carolyn says

        January 28, 2021 at 9:09 am

        Probably! Replace the butter with any preferred oil and then replace the protein powder with egg white protein.

        Reply
  8. Kathleen says

    April 18, 2020 at 4:49 pm

    My husband came home with a large container of blueberries yesterday and as I searched for blueberry muffins, I found this recipe instead. I made it this morning and we just had it with coffee for an afternoon snack. I’m not the biggest blueberry fan, until now, that is! It was so delicious and I only used half the blueberries in the package, so I’m making another one tomorrow and will freeze it. Thank you for making this ol’ girl into a blueberry LOVER!!!

    Reply
    • Carolyn says

      April 18, 2020 at 5:10 pm

      So glad to hear it!

      Reply
  9. Tracy Andries says

    April 19, 2020 at 12:27 am

    Was looking for a dessert for this weekend and this popped up. I used raspberries instead of blueberries and it turned out great. Came out of the pan no problem. Topped with whipped cream. Freezing what’s left for next weekend so something to look forward to. Thanks for another wonderful recipe.

    Reply
    • Carolyn says

      April 19, 2020 at 7:31 am

      Glad to hear it, Tracy!

      Reply
  10. Ellie says

    April 19, 2020 at 4:48 am

    Greetings from Madrid Carolyn! This is absolutely mouthwatering, can’t wait to try it! One question though, the Swerve brand is not marketed here nor any low-carb brown substitute, at least that I know of… Can I use regular granulated erythritol or stevia instead? Thanks in advance for the reply and amazing recipes!

    Reply
    • Carolyn says

      April 19, 2020 at 12:52 pm

      Regular erythritol would be fine.

      Reply
      • Ellie says

        April 23, 2020 at 4:22 pm

        Thanks for the confirmation!

        Reply
    • Annalisa says

      April 21, 2020 at 6:47 pm

      In Europe you can find Sukrin, which is the European equivalent of Swerve. Moreover, if you look on Amazon, you can find various less-known low-carb sweeteners that are made of erythritol and stevia, just like Swerve.

      Reply
      • Erica B says

        April 22, 2020 at 4:20 pm

        Hi Annalisa, just FYI, there is no stevia in Swerve. Swerve is erythritol + oligosaccharides, a prebiotic fiber of sorts. You’re right though, lots of erythritol-based sweeteners out there.

        Reply
    • Laura says

      May 2, 2020 at 12:16 pm

      Ellie I live in Spain as well and you can buy golden erythritol on Amazon. Look for “eritritol GOLD” from NKD Living or Sukrin Gold (which I prefer – the texture is more similar to a traditional brown sugar). Enjoy! This looks like it would make a nice quarantine breakfast 🙂

      Reply
  11. Marilyn Roper says

    April 21, 2020 at 7:43 am

    This looks awesome!! I couldn’t find the nutritional value of theirs cake anywhere. Do you have it calculated?

    Reply
    • Carolyn says

      April 21, 2020 at 8:25 am

      It’s actually on their site at the bottom but it took a while to load for me so that I could scroll down.

      Reply
  12. Sharon says

    April 21, 2020 at 2:16 pm

    It came out perfect. I didn’t have a 9X9 pan so I used a Bundt cake pan. I Substituted protein powder for collagen powder and it came out fluffy. This is a keeper!

    Reply
  13. Liz J says

    May 2, 2020 at 3:31 pm

    Hi Carolyn,

    I just took this out of the oven, I did it with strawberries instead of blueberries. I wanted to know if I could use pineapple next time. I love Pete and Gerry eggs we get them at our local Roche Brothers store, they are always fresh.

    Reply
  14. Rita says

    May 9, 2020 at 5:17 pm

    I wanted to post a picture of a cut portion, but already posted a pic of the complete cake on Pete and Gerrys. It seems once you post a picture you are not able to post another.
    I don’t see anyplace on your Pinterest page to post a picture. It looks better cut.
    This cake is delicious. My granddaughter agrees with me.
    Thank you,
    Rita

    Reply
  15. Mary says

    May 10, 2020 at 6:01 pm

    When using frozen blueberries, do you let them thaw first?

    Reply
    • Carolyn says

      May 10, 2020 at 9:04 pm

      No, they are easier to work with when added frozen because they don’t release all of their juices until baking.

      Reply
  16. Jill C. Henrich says

    June 19, 2020 at 1:58 pm

    I am wanting to bake the blueberry upside down cake but am having trouble finding the unflavored whey protein. What is your source for it? Thanks.

    Reply
    • Carolyn says

      June 19, 2020 at 5:46 pm

      I usually get mine on Amazon or on Thrive Market https://amzn.to/2YUG4Dh

      Reply
      • Jill C. Henrich says

        June 20, 2020 at 1:36 pm

        Thank you! I made your oreo cookie cheesecake today. OR at least it’s in the instant pot now. Serving for Father’s Day . Thank you for having this site!

        Reply
        • Carolyn says

          June 20, 2020 at 3:35 pm

          Thank you for trying out my recipes! 🙂

          Reply
  17. Pamela says

    July 9, 2020 at 3:46 pm

    Where the heck is the recipe..see no link or anything..m

    Reply
    • Carolyn says

      July 9, 2020 at 3:53 pm

      You don’t see the BIG link at the bottom of the article that says the recipe is on the Pete and Gerry’s website?

      Reply
  18. jeannette hughes says

    July 18, 2020 at 8:06 pm

    Instead of making the cake can I use the Swerve white cake mix instead?

    Reply
  19. Igina says

    August 21, 2020 at 9:38 pm

    This is so good!! Can’t wait to try it with strawberries!! I’ll be posting a pic on instagram! Thanks for so many good recipes!!

    Reply

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Carolyn PortraitLooking for the best low carb recipes? You've come to the right place! I'm Carolyn, a major carnivore and an unrepentant sweet tooth. Here you will find all you need to enjoy the low carb keto lifestyle to the fullest! Read more

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