Keto Rhubarb Tart With A Frangipane Filling

This keto rhubarb tart is not only delicious but also stunningly beautiful. It features a rich, almond frangipane filling, a buttery shortbread crust, and a colorful, brightly flavored rhubarb topping. 

It’s the perfect keto dessert you’ll want to make over and over during rhubarb season. 

All the flavors of this low-carb rhubarb tart complement each other wonderfully. And although it may look like a fancy, complicated recipe, it’s actually relatively easy to put together.

If you’re a fan of tarts and pies, be sure to check out our entire collection of keto pies. And for those of you looking for more rhubarb recipes that are keto-friendly, be sure to visit our keto rhubarb recipes page.

Keto Rhubarb Tart With Frangipane Filling

Although I could have made this keto rhubarb tart without a layer of filling, the addition of frangipane takes this keto dessert over the top.

If you are not familiar with frangipane, it’s a classic French almond flour-based paste made with eggs and some sweetener.

Made with fresh or frozen and thawed rhubarb, it’s packed with flavor, and the pink rhubarb makes for a stunning sight.

The rhubarb tart, with its luscious frangipane filling and tender almond flour crust, is a dessert that everyone will welcome, even those not on a keto diet.

Ingredients You’ll Need To Make A Keto-Friendly Rhubarb Tart

Note that the full printable recipe is at the bottom of the page.

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.

Almond Crust

• Finely milled almond flour
• Melted unsalted butter
• Granulated sugar substitute
• Sea salt

Frangipane Filling

• Almond flour
• Unsalted butter
• Granulated sugar substitute
• Egg
• Vanilla extract
• Almond extract
• Heavy cream
• Sea salt

Rhubarb Topping

• 7-8 rhubarb stalks, sliced into 1-inch pieces, cut on the bias
• Granulated sugar substitute

How To Make A Keto Rhubarb Tart With Frangipane Filling

Keto Shortbread Crust: You’ll be making an almond crust for the rhubarb pie. The crust consists of almond flour, sugar substitute, salt, and melted butter.

Once it’s mixed together, it’s patted to the bottom of the 10-inch tart pan with a removable bottom, then baked until golden brown for about 15 minutes.

Keto Frangipane Filling: To make the frangipane filling, you’ll cook the butter over medium heat in a skillet pan until it’s lightly browned.

Then, in a large bowl, combine the almond flour, sugar substitute, vanilla and almond extract, and salt.

Add the browned butter to the almond mixture, and then add the egg and heavy cream and mix well. Transfer the filling to the top of the baked tart shell.

Rhubarb Topping: Add the rhubarb that has been sliced into 1-inch pieces on the bias to the top of the tart.  Sprinkle over the surface of the sliced rhubarb, the granulated sugar substitute.

Then it’s just a matter of baking the rhubarb tart for an additional 25–30 minutes, or until set and golden brown.  

Best Sugar Substitutes For A Low-Carb Rhubarb Dessert

When it comes to choosing which sugar substitute to use for this sugar-free rhubarb tart, 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 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 this recipe.  However, if you decide to use Pyure, you will want to use half the amount called for in this recipe since it’s a much sweeter option.

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

Tag Us

I sure hope you will give this keto rhubarb tart with frangipane filling a try. Once you do, make sure you remember to tag us on Instagram and Facebook. It’s what keeps this girl encouraged to keep sharing and perfecting her recipes.

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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.

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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 using the keto diet to transform their lives.

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Enjoy early access to recipes before they go live on the website. Plus, there are bonus recipes that are exclusive to the app. Make your own personal cookbooks that you can use to organize your favorite recipes.

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The app is loaded with hundreds of yummy recipes for breakfast, lunch, dinner, snacks, and even desserts!

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