Keto Strawberry Rhubarb Cake

My keto strawberry rhubarb cake makes the perfect seasonal cake. It features a vanilla cake that is infused with the flavors of strawberries and tart rhubarb and drizzled with vanilla icing that takes it over the top.

It’s an easy way to enjoy a keto strawberry rhubarb coffee cake. Unlike most of our keto coffee cakes, this cake doesn’t have a crumb topping, which keeps things lighter.

It’s fair to say that I simply can’t get enough of rhubarb, and when it’s combined with strawberries, well, it has my heart.

Need proof of my love of rhubarb? Just check out my large collection of keto rhubarb recipes. I’m sure you are sure to find some new favorites. 

Of course, as a cake lover, you should also check out our entire collection of keto cakes for more delicious options!

Keto Strawberry Rhubarb Cake

What’s especially nice about this low-carb strawberry rhubarb cake is that it’s so simple to make.

Unlike my keto strawberry rhubarb pie, which is worth the extra work, it requires you to make the crust first.

This cake, however, is fuss-free.

It’s perfect when you have a bounty of rhubarb and juicy strawberries looking for a delicious, quick treat.

Clocking in at only 2.6 g net carbs per serving, it’s a delicious seasonal treat you can enjoy while doing a low carb diet.

It’s a recipe to which you can add a scoop of keto vanilla ice cream and stay within your daily macros.

How Long Is Rhubarb Is Season?

If you want to use fresh rhubarb, keep in mind that rhubarb is in its peak season from mid-spring to mid-summer.

There are some varieties of rhubarb, such as hothouse, that can lengthen the season as late as winter and early spring.

Depending on where you live, it will either be easy to source or hard to come by. Here in South Florida, there are years that make it quite hard to get your hands on fresh rhubarb.

That being said, there are some places you can get it shipped during rhubarb season. 

The good news is that this recipe can use both fresh or frozen rhubarb, which is much easier to find. Or when I do get my hands on some fresh rhubarb, I freeze what I can’t use within a couple of weeks max.

Ingredients Needed For This Keto Coffee Cake

Disclosure: Some of the links below are affiliate links, meaning, at no additional cost to you, I will earn a commission if you click through and make a purchase.

The following are the ingredients you’ll need for this recipe: Note that the full printable recipe card is at the bottom of the page, along with the nutritional information.

Keto Strawberry Rhubarb Coffee Cake

• Almond flour finely milled, measured, and sifted
• Granulated sugar substitute I give details below as to my recommendations
• Baking powder
• Sea salt
• Coconut flour
• Melted butter, cooled
• Sour cream, room temperature
• Vanilla extract
• Fresh or frozen rhubarb
• Fresh strawberries
• Eggs, room temperature

Keto Vanilla Icing

• Confectioner’s sugar substitute
• Vanilla extract
• Pinch of salt
• Heavy cream

How To Make A Keto Strawberry Rhubarb Cake

I have a few tips you will want to keep in mind when making this keto-friendly strawberry rhubarb cake.

After all, you want your coffee cake to be amazing enough for everyone in your family to enjoy, including those who are not doing keto.

• When making this strawberry rhubarb gluten-free cake, I recommend that all your ingredients be at room temperature. Doing so will allow your batter to blend easily and ensure that your coffee cake is moist. 
• I made my coffee cake in an 11 x 7.1-inch baking pan, but you can also make it in a 10-inch springform pan
• or even a 10X10 inch square pan.

To prepare the cake, start by greasing an 11 x 8-inch pan with butter. Then, wash, dry, and slice the rhubarb and strawberries and set them aside.

Preheat the oven to 350 degrees. In a large bowl, combine the sifted almond flour, coconut flour, sugar substitute, baking powder, and salt, and set the mixture aside.

Next, melt the butter and allow it to cool. In a medium-sized bowl, combine the cooled melted butter, sour cream, vanilla extract, and eggs until well combined, and set the mixture aside.

Add the wet mixture to the large bowl of dry ingredients, and mix the batter with a spatula until well incorporated.

Then, fold in half of the sliced strawberries and rhubarb into the batter.

Spread the batter into the prepared pan and add the remaining sliced strawberries and rhubarb to the surface of the cake, pressing them gently onto the cake.

Bake the cake for 35-40 minutes, or until it is lightly browned and an inserted toothpick comes out clean.

For the icing, in a small bowl, combine the confectioner’s sugar substitute, salt, vanilla extract, and heavy cream.

Note that the icing should be made once the cake has cooled, so it does not harden.

Allow the cake to cool for 20 minutes on a baking rack before drizzling the icing and serving.

Any leftovers can be stored in an airtight container in the refrigerator for up to 5 days or frozen for up to 3 weeks.

Best Sugar Substitute For This Recipe

When it comes to choosing which sugar substitute to use for this sugar-free strawberry rhubarb cake, I have several for you to choose from. 

My go-to choice is Lakanto Monk Fruit because the texture is spot-on since there is barely any aftertaste. It is a monk fruit and erythritol blend.

Lakanto Monk Fruit gets its sweetness from antioxidants called mogrosides, instead of fructose or sucrose. That’s why it’s a great all-natural sugar substitute and has zero calories and a zero glycemic index.

I’m also partial to  Swerve an erythritol blend. Unlike other natural sweeteners like stevia, it has no bitter aftertaste and measures just like sugar.

Swerve is the name brand of erythritol; it’s unlike other sugar alcohols that have a 0 % impact on blood sugar.

You could also use the stevia- and erythritol-based brand Pyure for most of my baked goods. 

But if using Pyure, you will want to use 1/2 the amount called for in this recipe since it’s much sweeter.

If you can easily find a more natural sugar substitute, you can also use Splenda with great success. 

You will need a confectioner’s sugar substitute for keto vanilla icing. Thankfully, both Lakanto and Swerve have great ones.

Other Keto Strawberry Rhubarb Recipes

• Keto strawberry rhubarb crisp
• Keto strawberry rhubarb scones
• Keto strawberry rhubarb cheesecake
• Keto strawberry rhubarb muffins
• Keto strawberry rhubarb pie

Tag Us

I sure hope you will give this recipe a try. Once you do, make sure you remember to tag us on Instagram and Facebook.

It’s what encourages this girl to keep sharing and perfecting her recipes.

And as a fan of strawberries, you might want to also visit this collection of keto strawberry recipes for more delicious options!

Also, check out our Amazon Store for our recommendations. You might be surprised by how many great keto options are at your disposal.

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In case you don’t know, we have authored two books for you, Essential Keto Bread and Essential Keto Desserts, both inspired by your requests over the years.

I pray these keto cookbooks will help make keto a delicious breeze for you.

Join Our Jesus And Keto Movement 

Randy and I came to the keto diet looking at it from a Christian perspective. As believers, we live our lives supported by God’s grace.

So when the Holy Spirit led us to combine our Christian faith and the keto diet, we did so in hopes of finding lasting transformation.

To say we needed God’s intervention is to put it mildly. When we followed the Holy Spirit’s prompting, we got on the path to real transformation. 

Knowing firsthand the benefits of this decision, we have created a closed Christian group that is using the keto diet to transform their lives.

We invite you to join our Private Facebook Group and see if it’s not the key you have been missing.

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