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May 14, 2020

Keto Strawberry Rhubarb Dump Cake

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

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Keto dump cake is so easy to make and tastes fabulous. This low carb dessert features the bright flavors of strawberries and rhubarb with a buttery crust.

Titled image of keto strawberry rhubarb dump cake. A bowl with cake and some ice cream in front and the pan in behind with a bowl of strawberries.

Okay so let’s talk about dump cakes, shall we? Because I had honestly never heard of them until a few years ago. I don’t know if it’s my Canadian upbringing or what, but they were entirely foreign to me.

I love the foodie world because it’s constantly introducing me to new things. And then I take this new idea, give it a keto makeover, and in turn introduce them to you.

So it was time I created a keto dump cake. It was a huge experiment, but it turned out better than I could have hoped. This strawberry rhubarb dump cake will not be my last!

Are you a rhubarb fanatic too? Then be sure to also check out my keto rhubarb crisp and my keto rhubarb scones!

A white oval dish of keto dump cake with strawberries and rhubarb in the background.

What is dump cake?

In case you are as clueless as I was before embarking on my dump cake journey, let me enlighten you.

Dump cake is much as it sounds: you dump all of your ingredients into the pan, and you bake it. Much less work than a conventional cake. And they come out more like a delicious fruit cobbler, rather than a traditional sponge cake.

Sounds great, right? Except for the fact that most dump cakes are made with canned pie filling and boxed cake mix. Gasp, splutter, gasp! Oh, the sugar, oh the carbs!

Don’t worry, we aren’t going there. I have my ways and means, my lovelies.

Top down photo of keto dump cake with a dish of the cake off to the side.

How to make keto dump cake

Making the filling keto-friendly was quite easy. No need to use any canned pie filling, just toss the suite with sweetener and a little thickener like glucomannan or xanthan gum.

What fruit you choose is obviously very important, since fruit contains so much sugar. But the amount of fruit you need for a dump cake is significant and even berries aren’t quite low enough in carbs.

I highly recommend mixing the fruit with something like rhubarb, which is really low carb, and has it’s own delicious thing going on. But you could do something like chayote squash as well.

Replacing the standard cake mix for the topping took a little more consideration. I considered what normally goes into one of my keto cake recipes and cut it down to size.

Then I followed standard practice and simply drizzled melted butter over the top. It worked out beautifully, and I ended up with a bubbly sweet filling topped with a slightly crispy golden brown topping.

I did have to use a bowl to mix my topping together before “dumping”. A small price to pay for a healthier dump cake!

A bowl of keto strawberry rhubarb dump cake on a plaid napkin on a white table.

Tips for making this recipe

This delicious strawberry rhubarb cake is simple to make, but here are my best tips for getting it right:

  • Use a glass or ceramic baking dish, as acidic fillings like rhubarb can react with metal and take on a tinny taste.
  • The filling can be made with any sweetener you like best.
  • You don’t have to use a thickener in the filling, but your dump cake will be more watery when serving.
  • For a crispy topping, you really need an erythritol based sweetener such as Swerve. Other sweeteners (allulose, xylitol, etc.) will result in a softer cake. Which is absolutely fine if that’s what you’re looking for.
  • As you drizzle the butter over the “cake mix”, try to get as even as possible. But it’s okay to have a few dry spots, they will still cook through.

Storing and serving Strawberry Rhubarb Dump Cake

Top with some keto vanilla ice cream or some lightly sweetened whipped cream.

A cake like this is best served fresh, although it will last in the refrigerator for 3 to 4 days. The topping won’t stay crisp but it’s still delicious.

Simply cover the whole dish with plastic wrap or tinfoil before refrigerating.

More keto rhubarb recipes

  • Vanilla Custard with Roasted Rhubarb
  • Rhubarb Coffee Cake
  • Strawberry Rhubarb Fool
  • Rhubarb Dream Bars
  • Rhubarb Lemon Meringue Squares
  • Berry Rhubarb Jam
4.44 from 16 votes
A bowl of keto strawberry rhubarb dump cake on a plaid napkin on a white table.
Print
Strawberry Rhubarb Dump Cake
Prep Time
15 mins
Cook Time
45 mins
Total Time
1 hr
 

Keto dump cake is so easy to make and tastes fabulous. This low carb dessert features the bright flavors of strawberries and rhubarb with a buttery crust.

Course: Dessert
Cuisine: American
Keyword: keto dump cake, strawberry rhubarb
Servings: 10 servings
Calories: 217 kcal
Ingredients
Filling
  • 2 1/2 cups chopped rhubarb
  • 1 cup chopped strawberries
  • 1/2 cup powdered Swerve Sweetener
  • 1/2 tsp glucomannan can sub xanthan gum
Topping
  • 1 1/4 cup almond flour
  • 1/3 cup Swerve Sweetener
  • 1/4 cup coconut flour
  • 2 tsp baking powder
  • 1/4 tsp salt
  • 2/3 cup butter melted
Instructions
Filling
  1. Preheat the oven to 350F and grease a 2-quart glass or ceramic baking dish.

  2. Add the rhubarb and strawberries to the dish and sprinkle with the sweetener and glucomannan. Toss to combine well.

Topping
  1. In a medium bow, whisk together the almond flour, sweetener, coconut flour, baking powder, and salt. Sprinkle evenly over the filling in the dish.

  2. Drizzle the melted butter as evenly as possible over the topping. Get as many places as you can, but it's okay to have a few dry bits.

  3. Bake about 45 minutes, until the top is golden brown and the filling is bubbling up through in places. Remove and let cool (the topping will crisp up some as it cools).

Nutrition Facts
Strawberry Rhubarb Dump Cake
Amount Per Serving (1 serving = 1/10th of recipe)
Calories 217 Calories from Fat 170
% Daily Value*
Fat 18.9g29%
Carbohydrates 7.4g2%
Fiber 3.4g14%
Protein 3.9g8%
* Percent Daily Values are based on a 2000 calorie diet.
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Filed Under: Keto Cakes Tagged With: rhubarb, strawberries

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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.

Reader Interactions

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Comments

  1. Amanda says

    May 14, 2020 at 10:10 am

    I am wondering if one can use frozen strawberries or rhubarb (thawing them first). Also wondering if you can do this with all rhubarb and no strawberries? Where I live (Canada) there is at least a month between rhubarb season and strawberry season…

    Reply
    • Carolyn says

      May 14, 2020 at 11:38 am

      yes and yes, to all your questions… 😉

      Reply
      • Amanda says

        May 14, 2020 at 3:00 pm

        Excellent! Thanks. Feeling for all you people unable to find rhubarb, I have all the rhubarb and am always trying to foist it off on people.

        Reply
  2. Faith says

    May 14, 2020 at 11:05 am

    Growing up in NY, strawberry rhubarb dump cake was my favorite dessert, although the “strawberry” part was a pkg of dry strawberry jello sprinkled over the rhubarb, then the cake mix, then the butter and a cup of water poured over. I now live in SC and rhubarb doesn’t grow here and you can’t buy it unless you find it in the tiny “foreign and lonely foods” section-right next to the turnips, etc. I also have to eat gluten free now and I have missed it so much-thank you for making this in a gf low carb version so next time I find some rhubarb, I’ll know where to come for the recipe revision! Yay!!

    Reply
    • Carolyn says

      May 14, 2020 at 11:38 am

      Glad to hear it, Faith! When you do come across extra, buy a bunch and slice it and freeze it. That’s what I do!

      Reply
    • Kelly says

      May 14, 2020 at 3:36 pm

      Faith, you might be able to find it in the freezer section of a grocery store. That’s where I found some when I couldn’t find it fresh in the store.

      Reply
  3. Pam Bradley says

    May 14, 2020 at 12:06 pm

    Rhubarb is rare in my area. I see you mentioned chayote. I have tried chayote before in a recipe. It was quite watery. Do you have any specific tips for using chayote ?

    Reply
    • Carolyn says

      May 14, 2020 at 2:37 pm

      Yup… use the thickener I mention!

      Reply
  4. Heidi says

    May 14, 2020 at 6:33 pm

    I am a strawberry rhubarb fanatic! I recently bought a tower garden and am thrilled about being able to grow rhubarb indoors all year round! I also love dump cake! My grandma often made it when we would visit. Her method of distributing the butter so that it completely covered the dry cake mix was to slice a very cold stick of butter into very thin slices and lay them on top of the cake so they were almost touching. It was beautiful!

    Reply
    • Carolyn says

      May 14, 2020 at 7:20 pm

      Okay, please enlighten me…. what is a tower garden?

      Reply
      • Katie says

        June 10, 2020 at 7:09 pm

        A tower garden is an indoor garden tower that self waters and you plug into an outlet and whatever herbs or green grow vertically versus horizontally like in a raised outdoor garden. You can grow 10 different herbs or veggies. If you have heard of the aerogarden its the same concept but aeorgardens are table top and much smaller. The water basin at the bottom can self water all the pots so its like a vertical fountain but with herbs or some veggies. They are nice for people who dont have yards or much space to have an actual garden. Or who lack a green thumb and kill most plants. Heres a link on amazon: https://www.amazon.com/Mr-Stacky-Smart-Farm-Hydroponic/dp/B06VSHBNXS/ref=pd_sbs_86_2/136-7213214-3120949?_encoding=UTF8&pd_rd_i=B06VSHBNXS&pd_rd_r=150b9aaf-e00b-4a0c-a545-40d49de7c28a&pd_rd_w=Gflbv&pd_rd_wg=93Gn5&pf_rd_p=e20a7044-dca9-4b2c-8da8-05b176efe6fb&pf_rd_r=DQXM344RFJDXC01EJVYM&psc=1&refRID=DQXM344RFJDXC01EJVYM

        Reply
  5. LIZ J says

    May 14, 2020 at 8:47 pm

    Hi Carolyn,

    Can I use just the strawberries or strawberries with another fruit? Not sure if I would like rhubarb so don’t want to spend money to buy it and have to throw it out.

    Thanks,
    LIZ J

    Reply
  6. LeAnn Kealey says

    May 15, 2020 at 7:47 am

    Most of the dump cakes I have done were in a slow cooker. Do you think this recipe would work in a slow cooker?

    Reply
    • Carolyn says

      May 15, 2020 at 4:49 pm

      I can’t say for sure. I do suspect that the moist heat of the slow cooker will make your topping rather soggy. Tasty, but not crisp.

      Reply
  7. Doris Poore says

    May 15, 2020 at 9:29 am

    I made this last night for our dessert. It was so delicious and very easy to make. I’ve never cooked rhubarb before and was afraid it would be sour but it was just right. My husband who won’t try new things even said it was good. I did serve it warm with a scoop of vanilla low carb ice cream. This recipe is definitely a keeper!

    Reply
    • Carolyn says

      May 15, 2020 at 4:49 pm

      Hooray!

      Reply
      • Samantha jo says

        May 16, 2020 at 11:50 am

        Hello there sweet, wondering if I can use an unflavored gelatin as a thickener?? Anyone done that yet??

        Reply
        • Carolyn says

          May 16, 2020 at 11:54 am

          No, I haven’t tried that but I suspect it will make your filling rather jelly-ish.

          Reply
          • Louise says

            May 17, 2020 at 2:30 pm

            Any chance you have a nut-free sub for the almond flour?

          • Carolyn says

            May 17, 2020 at 6:28 pm

            Try sunflower seed flour.

        • Joann says

          June 4, 2020 at 7:58 pm

          I have made it with diet straberry jello. Poured it over the rubard and sugar. It was delishous

          Reply
  8. Jennifer says

    May 16, 2020 at 5:04 pm

    Dump cake is huge in Kansas. We’ve been making them since I was very little. Suggestion: if you want to make sure the whole top is covered in butter, slice the butter in thin pats and lay them over the top. They will melt in and make a wonderful, crisp top. Can not wait to try this. May do it with zucchini and cinnamon making an “apple” dump cake!!! Mmmmm!

    Reply
    • carol says

      May 23, 2020 at 1:39 pm

      What a wonderful idea!

      Reply
  9. Jane Armstrong says

    May 17, 2020 at 9:28 am

    5 stars
    This is a beautiful recipe. I made it yesterday and it is delicious. Our Sprouts store had just received fresh rhubarb. It wasn’t out in the store yet so they went in the back and brought me two beautiful stalks. I also used fresh strawberries. I will definitely be making this again. I served it with almond milk whipped cream that I also found at Sprouts.

    Reply
  10. Christa says

    May 17, 2020 at 8:19 pm

    5 stars
    Made this early this morning for our Sunday family dinner. So easy & quick! Huge hit with the family, so much so that I’m making another one tonight. Thank you thank you thank you! Your recipes keep this keto girl goin!

    🍓🍓🍓

    Reply
    • Carolyn says

      May 17, 2020 at 10:10 pm

      So glad to hear it!

      Reply
  11. MJ says

    May 19, 2020 at 2:11 pm

    5 stars
    I grew up with a family garden and my parents often made rhubarb pie. This recipe took me back to childhood and was equally delicious. I am Type 1 and I cannot tell you how happy it made me to be able to enjoy such a nostalgic treat.

    Reply
    • Carolyn says

      May 20, 2020 at 7:20 am

      Happy to hear that!

      Reply
  12. Lorraine says

    May 29, 2020 at 7:23 pm

    4 stars
    This was way too sweet for me even though I used about 15% less sweetener. I will reduce further next time. I also found it made 6 portions not 10. I love rhubarb so will make again but would love more of a sponge cake topping (lives Eve’s Pudding). Anyone know of a recipe?

    Reply
  13. Mary Sturgeon says

    May 30, 2020 at 7:59 am

    RHUBARB 😍😍😍 I made this dump cake for the first time earlier this week. Made it last night with a few alterations….I made it in an unusual loaf pan(4×12) so there would be more edging less middle which became more soggy than the edges when I first made it. I eliminated the strawberries (why mess with rhubarb 😉) because I thought it added to the moisture content too. Added another cup of rhubarb. Plus, I added a little more coconut flour (1/8c) I also used less sweetener when mixing the rhubarb with the Xanthan gum. I couldn’t wait to try it last night and it was good but this morning it was even better😍😍😍. Thx Carolyn! Now to try more of your beloved rhubarb recipes

    Reply
  14. Kathleen O. says

    June 10, 2020 at 7:36 pm

    On the menu for this weekend. The rhubarb crisp recipe was a winner and hubby came home with more rhubarb and asked “what’s next”? A question about using ground chia seeds as a thickener – thoughts? suggested amounts?

    Reply
    • Carolyn says

      June 11, 2020 at 7:19 am

      I did that in my previous rhubarb crisp recipe. It’s okay…kind of gummy.

      Reply
  15. Raquel says

    June 13, 2020 at 12:26 pm

    Can you use the Swerve cake mix for the topping?

    Reply
    • Carolyn says

      June 13, 2020 at 1:00 pm

      I don’t know, I haven’t tried that.

      Reply
  16. matthew locastro says

    June 14, 2020 at 8:32 am

    5 stars
    This recipe is perfect. Will be making it again and again.

    Reply
  17. Jake says

    June 19, 2020 at 9:29 am

    1 star
    Ugh, this was horrible. I had such high hopes…but is basically wet sand with some mushy fruit under it.

    Reply
    • Carolyn says

      June 19, 2020 at 11:35 am

      5 stars
      Sorry you didn’t love it but you can see many people do so I think something must have gone wrong on your end. What sweetener did you use?

      Reply
  18. Erin says

    June 22, 2020 at 10:28 am

    5 stars
    Dump cakes are the best and I love this strawberry rhubarb flavor combo, so great for summer

    Reply
  19. Rachael Yerkes says

    June 22, 2020 at 10:30 am

    5 stars
    I love a delicious dessert that works well with my diet! This one is super great

    Reply
  20. Matt Taylor says

    June 22, 2020 at 10:53 am

    5 stars
    I don’t do enough with rhubarb! This looks so easy to make. 🙂

    Reply
  21. katerina @ diethood.com says

    June 22, 2020 at 2:34 pm

    5 stars
    I can’t wait to try this! It sounds like the perfect keto dessert!

    Reply
  22. Trish says

    June 27, 2020 at 10:27 pm

    1 star
    Unfortunately, this will not be a keeper for us. The flavor is pretty good but the texture is not at all. Very mushy. I followed the recipe exactly except I used Lakanto monkfruit sweetener.
    I’ll try some of the other rhubarb recipes on this site because I have a ton of it and I’ve had good luck with other recipes here.

    Reply
    • Carolyn says

      July 3, 2020 at 5:24 pm

      5 stars
      The top should not be mushy so I suspect the sweetener was the issue. Also… what flours did you use?

      Reply
  23. Julie says

    August 28, 2020 at 10:33 am

    5 stars
    This dump cake is one of the best low carb desserts I’ve made besides your cheesecake. If you like strawberries and rhubarb you won’t be disappointed. thanks!

    Reply
    • Carolyn says

      August 29, 2020 at 7:51 am

      So glad to hear that!

      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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