Strawberry rhubarb embodies everything I love about spring and early summer, with all the fresh produce coming into season. And this easy keto dump cake recipe showcases those fresh flavors to perfection. Served slightly warm, with a scoop of keto ice cream, it just makes my heart burst with happiness.
If rhubarb makes your heart sing too, then you will love my recipes for Keto Rhubarb Crisp and sugar-free strawberry rhubarb sauce!
I had honestly never heard of dump cakes until a few years ago. I don’t know if it’s my Canadian upbringing or what, but they were entirely foreign to me. But I can understand the appeal! You simply dump all of your ingredients into the pan and bake it. And they come out more like a delicious fruit cobbler, rather than a 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!
But it really doesn’t take much to make it from scratch with healthier, low carb ingredients. And the popularity of this luscious cake proves it beyond a shadow of a doubt.
Why we love this recipe
- Easy to make: Just mix, dump, and bake – it’s that simple!
- Sweet and tart balance: Strawberries and rhubarb are magical together. The tartness of the rhubarb offsets the sweetness of the berries perfectly.
- Buttery crisp topping: The “cake” topping becomes slightly crisp on top, which complements the luscious fruit filling.
- Versatile serving options: It’s delicious on its own or topped with keto ice cream or whipped cream.
- Low carb and gluten-free: Made with almond flour and keto sweetener, this is a wonderful summer dessert that won’t spike your blood sugar.
Reader’s Thoughts
“After going to at least 3 grocery stores and the farmer’s market, I finally found rhubarb! So glad I didn’t give up because this was absolutely delicious! The perfect balance of sweet and tart, you’ve done it again, Carolyn! Thank you!” — Katy
Ingredient Notes
- Strawberries: Use fresh berries for the best results, as frozen can make the filling rather soupy.
- Rhubarb: I also recommend fresh rhubarb. I’ve made it with frozen (thawed) rhubarb and it definitely was soupier than with fresh.
- Almond flour: You really do need to use a good finely ground almond flour for this recipe.
- Coconut flour: A little coconut flour in the crust mixture helps offset the moisture in the almond flour.
- Sweetener: You need a powdered sweetener for the filling, and an erythritol-based granular sweetener for the topping. Please see Tips for Success for more information.
- Glucomannan: This helps thicken the filling as the fruit releases its juice. You can also use xanthan gum.
- Kitchen staples: Butter, baking powder and salt.
Quick Overview: How to Make Keto Dump Cake
- Prepare the filling: Make your life simple by tossing the strawberries, rhubarb, sweetener, and thickener right in the baking dish!
- Make the “cake mix”: This keto mix uses a scaled down version of the dry ingredients from some of my keto cake recipes. You then simply sprinkle it overtop the filling as evenly as you can.
- Drizzle the butter: I actually found that spooning the melted butter over the dry mix gave me better overall coverage.
- Bake the cake: Pop it in the oven and wait until the topping is golden brown and the filling is bubbling around the edges. Heavenly!
Tips for Success
For fruit fillings like this, I always recommend a glass or ceramic baking dish. The acidity from the rhubarb can react with metal and give the dessert a tinny taste.
You can make this recipe with other fruits, such as berries or peaches. But that will change the carb count. Rhubarb is very low carb and helps keep this recipe in range for people who eat a keto diet.
Err on the side of the cake becoming more browned on top, rather than less. It will allow more of the topping to become crisp.
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. I found that spooning the butter over, rather than pouring from a bowl, allowed me to distribute it more evenly.
Sweetener Options
For the filling, you want to use a powdered sweetener to avoid any grittiness. But it can be erythritol or allulose, or really any sweetener you like best. The topping requires an erythritol based sweetener, with NO allulose in it, to crisp up properly.
Frequently Asked Questions
Fresh rhubarb contains very few carbs per serving and is an excellent addition to your keto diet. Diced rhubarbs stalks have only 6g of carbs and 2g of fiber per cup. And it’s delicious in low carb desserts like dump cake!
A cake like this is best served fresh, although it will last in the refrigerator for 4 or 5 days. The topping won’t stay as crisp but it’s still delicious. Simply cover the whole dish with plastic wrap before refrigerating.
This keto strawberry rhubarb dump cake recipe has 7.4g of carbs and 3.4g of fiber per serving. If you count net carbs, that comes to 4 grams per serving.
Keto Dump Cake Recipe
Ingredients
Filling
- 2 1/2 cups (305 g) chopped rhubarb
- 1 cup (144 g) chopped strawberries
- 1/2 cup (91 g) powdered sweetener
- 1/2 tsp glucomannan, can sub xanthan gum
Topping
- 1 1/4 cup (140 g) almond flour
- 1/3 cup erythritol sweetener
- 1/4 cup (30 g) coconut flour
- 2 tsp baking powder
- 1/4 tsp salt
- 2/3 cup (151.33 g) butter, melted
Instructions
Filling
- Preheat the oven to 350ºF and grease a 2-quart glass or ceramic baking dish.
- Add the rhubarb and strawberries to the dish and sprinkle with the sweetener and glucomannan. Toss well to combine.
Topping
- In a medium bow, whisk together the almond flour, sweetener, coconut flour, baking powder, and salt. Sprinkle evenly over the filling in the dish.
- Drizzle the melted butter as evenly as possible over the topping. This works best by spooning it over, rather than pouring from a bowl.
- Bake about 45 minutes, until the top is golden brown all over and the filling is bubbling up through in places. Remove and let cool (the topping will crisp up some as it cools).
Notes
Nutrition
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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Hi. I was wondering if you could just use strawberries or blueberries or peaches in the strawberry rhubarb dump cake recipe?
This recipe looks absolutely delicious. I used to make a dump cake with 1 can of cherry pie or apple pie filling, so I absolutely love dump cakes!
Thank you
Absolutely! It will change the carb count, though.
can you mix the toppings and butter together before toping it? same with the fruits and sweetener ?
That’s not how a dump cake is made… but you’re certainly welcome to try.
After going to at least 3 grocery stores and the farmer’s market, I finally found rhubarb! So glad I didn’t give up because this was absolutely delicious! The perfect balance of sweet and tart, you’ve done it again, Carolyn! Thank you!
I haven’t yet tried this recipe but I know it will be awesome! We love the strawberry/rhubarb combination. Plan to get the rhubarb and try it today. My question relates to glucomannan/xanthan gum. I have both and understand that they must be somewhat interchangeable. Is there a rule of thumb of which is better to use in a particular type of recipe? Also, just an aside…I have tried numerous times to get the keto baking tips you offer and they never come in my email inbox, junk or trash. I don’t understand. Would love to have it. I changed my password and received that email from you so I know I get your email. Is there a link you could send that I could access that information?
Hi Barbara, my system shows all the emails that have been sent to you and the “status” as well. You did receive that series of emails when you first signed up in 2021 and you opened all of them. So I don’t think it lets you go through the series again…
Do you have nut free flour options for these? I love your recipes but I can’t do nuts or nut fours.
Not for this one, unfortunately. Do check out my nut-free section for other ideas! https://alldayidreamaboutfood.com/category/nut-free/
I’m allergic to almonds so I use a blend of coconut, chia, ground flax and ground sunflower seeds. I mix them in equal parts. It’s a tasty topping.
Great to hear!
Be careful about recommending erthyritol Recent studies are horrifying
I think you need to read some of the analyses of this study… the media made it blow up, but a lot of VERY credible doctors and researchers have pointed out the flaws in the study. It warrants much more research.
The study was conducted with ONLY heart patients🤦♀️🤣
I have some swerve cake mix that I got on clearance… I assume can it but I want to sure!
Sure, give it a go. But I don’t think you want the whole box… measure it out to be closer to my ingredients.
Hello, Carolyn! I love following you and your marvelous recipes. Just a thought…would you consider asking your website person to tighten up the information when printing? I would love to see the recipe to be able to print on just one page.
Thanks for your consideration!
I wish I could but it all depends on the length of the recipe!
can you use frozen strawberries and rhubarb?
Yes but you may want to add more thickener. Frozen strawberries release a lot of liquid.
Just awesome keto
This one didn’t work for us, but we’re glad we tried it.
The pro: The bottom part with the fruit was perfectly tasty, I’m glad that we have a perfect ratio for rhubarb/strawberry + sweetener and thickener. I am also thrilled to see glucomannan being used and the qty worked perfectly for the fruit. I can see myself making just the fruit part, even to use like a jam or topping. Total win.
The con: The texture of topping was not pleasant, although the dish improved a bit overnight. I didn’t let it go to waste, but would not use it again. I do not understand the purpose of the coconut flour (although I trust Carolyn), but the texture and flavor just didn’t work for us.
I love to have keto rhubarb options, so I will continue to try all of your recipes for rhubarb! The crisp is next! In Germany, there are a lot of rhubarb cakes that are covered with a meringue topping…sometimes a cake or shortcake like bottom, then rhubarb in vanilla custard, then meringue. Would love to see something like that! Thank you!
Fabulous! Thank you!
I’d like to make this but I live in a rural area and we don’t have rhubarb in our grocery stores. Is there anything else I can substitute or can I use all strawberries?
You can use all berries but it will be higher in carbs.
This is my favorite of your recipes so far! I served it with homemade whipped cream using powdered allulose and it was divine! Thank you for making my life so wonderful with these great recipes!
I hope this isn’t too annoying of a question, but do you think this would work the Swerve keto boxed cake mix instead of making it from scratch? It would be wonderful to not even have to mix that up!
Yep, it should. You may need more butter to drizzle over. I haven’t tried it myself but it’s a similar idea.
This turned out amazing! I used a turkey baster to even out the melted butter. It worked great! Thanks for the great recipes. I will be making this again as my Oregon strawberries and my rhubarb are growing like crazy