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.
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!
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.
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!
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
Strawberry Rhubarb Dump Cake
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
- Preheat the oven to 350F 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 to combine well.
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. Get as many places as you can, but it's okay to have a few dry bits.
- 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).
