This decadent Keto Lemon Mascarpone Tart has a smooth and creamy filling made with homemade Lemon Card and a super flaky gluten-free crust. Topped with whipped cream, this sugar-free dessert is sure to satisfy your sweet tooth!
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❤️ Why You'll Love This Keto Lemon Tart Recipe
- Decadent dessert with bold lemon flavor
- Easy to make in just a few steps
- Gluten-free and sugar-free
- Made with healthy ingredients
This Keto lemon tart is great for a special occasion or even when you're craving something sweet, but want to stay in Ketosis. You can top the tart with powdered sugar or whipped cream, or nothing at all! Either way, it's just delicious!
Your guests will fall in love with this tart and they'll never know that it's a low carb dessert!
What's in Keto Mascarpone Lemon Tart
- Keto Pie Crust
- 5 Minute Keto Lemon Curd
- Mascarpone cheese
- Monk fruit/allulose
- Heavy cream
*Exact measurements are listed in the recipe card below.
How to Make Keto Lemon Mascarpone Tart
To Make the Gluten Free Tart Crust
Preheat oven to 350°F.
Prepare the pie crust dough according to the directions.
Add the pie crust to a 9 inch nonstick tart pan with a removable bottom. Press it out in an even layer, going up the sides of the pan.
Prick the bottom of the crust with a fork and bake for 15 minutes or until golden. If the edges brown too quickly, lightly cover them with aluminum foil.
To Make the Lemon Filing
Add the lemon curd, mascarpone, sweetener and most of the heavy cream in the bowl of a food processor.
Mix until smooth and creamy. If the mixture is too thick, add the remaining heavy cream.
Pour the filing into the cooled tart crust and chill in the fridge for at least 1-2 hours or until set.
Top with powdered sugar or whipped cream and sliced lemons.
Are Lemons Keto?
They absolutely are! In fact, lemons are recommended on Keto because of their many health benefits. Where you typically avoid a lot of citrus fruit on Keto, lemons are the exception.
They're low in sugar, a great source of Vitamin C and contain antioxidants that promote healthy digestion and aid in fluid retention. There're many other great health benefits discussed in this article on Healthline.
Tips for the Perfect Keto Lemon Tart
What Sweetener is Best for Sugar Free Tarts
This is a no bake tart, so to keep the filling smooth and creamy, you want to stick to a confectioners sugar substitute. I used a monk fruit/allulose blend has that tastes very much like traditional sugar and doesn't have any cooling effect, but you can use Swerve confectioners will also work.
How to To Keep Your Lemon Tart Filing Smooth
Confectioner sugar substitutes really helps to keep the lemon curd in these tarts smooth. Depending on the power of your microwave, if it cooks too quickly, it can have a slightly grainy texture. But no worries, if this happens, just run through a fine mesh strainer. Problem solved!
How Do I Keep My Gluten Free Crusts from Breaking?
Tart crusts made with almond flour are very tender when they are still warm. In order to keep them from crumbling, allow them to cool in the tart pan for at least 15 minutes before removing them.
Can I Freeze Keto Mascarpone Lemon Tart?
You sure can. This gluten free lemon tart makes for a great make ahead dessert. For best results, place the tart back into the tart pan and wrap the pan and tart in plastic wrap.
To thaw, just place it in the fridge over night, then slice and serve when ready.
What Toppings are Good with Mascarpone Lemon Tart?
This rich and creamy lemon tart is perfect with just a little whipped topping but you can add fresh berries if you prefer. You can even drizzle it with a little sugar-free fruit sauce like these Raspberry, Strawberry or Blueberry sauces.
More Keto Lemon Desserts
- Lemon Thumbprint Cookies
- Strawberry Lemonade Cake
- Blueberry Lemon Scones
- Lemon Cheesecake Mousse
- Mini Lemon Curd Tarts
- Lemon Bars
- Lemon Meringue Cupcakes
- Lemon Poppy Mini Bundt Cakes
- Lemon Cupcakes
If you'd like to know more about baking on Keto, this article, Keto Baking Made Easy, is loaded with tips and info that you'll find helpful. You might also check out my Keto Sweet Treats eBook that has 50 amazing Keto dessert recipes, all with color pics, macros and more! I'm offering it at 50% off when you subscribe to my free weekly emails here.
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Keto Lemon Mascarpone Tart
RECIPE VIDEO
Ingredients
- 1 batch Keto Pie Crust
- 1 cup 5 Minute Keto Lemon Curd
- 8 ounces mascarpone cheese, softened
- ⅓ cup monk fruit/allulose, powdered
- 2-3 tablespoons heavy cream
Instructions
To Make the Tart Crust
- Preheat oven to 350°F. Prepare the pie crust dough according to the directions.
- Add the pie crust to a 9 inch nonstick tart pan with a removable bottom. Press it out in an even layer, going up the sides of the pan.
- Prick the bottom of the crust with a fork and bake for 15 minutes or until golden. If the edges brown too quickly, lightly cover them with aluminum foil.
To Make the Filling
- Add the lemon curd, mascarpone, sweetener and most of the heavy cream in the bowl of a food processor.
- Mix until smooth and creamy. If mixture is too thick, add the remaining heavy cream.
- Pour the filing into the cooled tart crust and chill in the fridge for at least 1-2 hours or until set. Top with powdered sugar or whipped cream and sliced lemons.
Recipe Notes
*Make sure to scroll up and read the post for substitutions, additions and helpful tips for making this recipe.
*Nutritional data is provided as a courtesy and is accurate to the best of my knowledge. You can verify it using the nutrition calculator of your choice. All data is based on net carbs, without sugar alcohol: Swerve, Erythritol, Monk Fruit or Allulose.
© Copyright for Keto Cooking Christian LLC. Please use the share buttons to share on social media, but please do not copy/paste the recipe.
Rate this RecipeOriginally published on May 10, 2018, updated on April 15, 2022 with improvements to the recipe, new photos and helpful tips.
Sandy
Thanks for the reminder that cream cheese does have carbs! I’d forgotten and was thinking it was like cream, no carbs. Also love your site, love the name!
Keto Cooking Christian
You are so welcome and thank you! 😊
Pam
So I made the crust exacly like the recipe says and used parchment and beans for weight an after 15 min it is still so raw. What did I do wrong?
Keto Cooking Christian
Not sure honestly, some ovens are different and might require a little more time.
Kim
How do you get the crust out of the tart pan?
Keto Cooking Christian
The tart pan that I use has a removable bottom, which makes it easier. But it shouldn't stick anyway, since there's a fair amount of butter in the crust.
Ruth
Where can I find mascarpone cheese 🧀 never heard of it, thanks
Ruth
Where can I find mascarpone cheese ? never heard of it, thanks
Keto Cooking Christian
Hi Ruth,
Most grocery stores sell it, I typically buy mine from Walmart because they seem to have the best price! It's sort of like cream cheese, but milder in flavor and has a lot less carbs. I use it a lot because it doesn't overpower the dish, and it's great for thickening and adding creaminess!
Kelli
What size tart pan did you use? Do you think a pie dish would work?
Keto Cooking Christian
Hi Kelli,
I used a 9" tart pan, but a pie dish should also work. When you press out the crust, don't go all the way up the sides. Pie dishes typically have higher sides than a tart pan, so there wouldn't be enough filling to reach the top. I hope that helps!