These keto butter tarts are the real deal! Tender grain-free pastry with a rich, gooey caramel custard center. The famous Canadian dessert is now low carb and sugar free.
Along with my beloved Keto Nanaimo Bars, these are the ultimate treat for Canada Day! Or any day, really.
This one goes out to my fellow Canucks, because only they can truly understand how momentous this recipe for keto butter tarts really is.
But even if you’re not Canadian, even if you don’t have a single drop of Canadian blood, I suggest you stick around. Chances are that many of you have never heard of butter tarts. But they are worth getting to know!
I actually first posted this recipe for keto butter tarts back in 2014, so it was time for an update. There have been so many developments in keto products and sweeteners in the intervening 7 years, I knew I could make them even more gooey and luscious than ever.
And to my utter delight, I was right! These sweet, gooey tarts are slightly larger, with a tender almond flour crust and a rich, caramel scented filling. They take me straight back to my childhood.
What are butter tarts?
If ever there was a national food of Canada, butter tarts are it. There are other uniquely Canadian dishes but butter tarts are loved and appreciated nationwide. In my home province of Ontario, there are even butter tart festivals and bake-offs, with everyone and their mother claiming they have the best recipe.
At their best, butter tarts are made of tender, flaky pastry with an incredibly gooey, sweet custard filling that usually contains raisins or dried currants.
The filling is similar to pecan pie but even more gooey. So gooey that it should ooze out all over your face as you take a bite.
In truth, they are unassuming-looking little tarts and you might be tempted to pass them over in favour of a more flashy-looking dessert. But a really good butter tart can beat the pants off any other dessert any time.
They also hold a special place in my heart, because my father loved them loved them so much. I have fond memories of him sitting at a cottage in Muskoka, devouring butter tarts. Even being terminally ill didn’t keep him from enjoying them!
Updated keto butter tarts
Traditional butter tarts are the stuff of a low carb dieter’s nightmares. They are made with copious amounts of brown sugar and corn syrup, and a large one can come in at a whopping 84g of carbs. Yikes!
However, never one to resist a challenge, I simply had to create a keto recipe. My earlier version was delicious, but the tarts were smaller and not as quite as gooey as I had hoped.
This time, I used the pastry from the Keto Cranberry Brie Bites, which holds together well. This allowed me to make them a bit larger.
The filling is similar to my famous Keto Pecan Pie Bars, but with some allulose to make it extra gooey. I also deliberately under-baked them, taking them out of the oven when the very center still looked a little wet. It was perfect!
How to make keto butter tarts
Okay, let’s get to the nitty gritty and make some. Here are my best tips for getting it right:
Tips for keto pastry crust
- Use a non-stick metal muffin pan and grease it lightly, to avoid sticking. Also don’t press it too firmly down into the bottoms of the muffin cups. It should just rest lightly.
- Do dust your work surface with a little more almond flour. This helps the pastry rounds release more easily. Wiggling a small offset spatula under the rounds also helps.
- Cut the circles about 3 ½ inches in diameter. I simply used a drinking glass, since none of my cookie cutters are that large.
- Freeze the crust while preparing the filling, so that they don’t brown quite as quickly in the oven.
Tips for butter tart filling
- This uses a sweeter, thicker version of my Keto Caramel Sauce. But this time I used some allulose to really get a gooey center. BochaSweet and xylitol would be the best substitutes. If you use all erythritol based sweeteners like Swerve or Lakanto, your filling will recrystallize some as it cools.
- Do let the sauce cool to lukewarm before adding the egg. Otherwise it will cook the egg and we don’t want that!
- Raisins are not really low carb, which is why I used only 2 tablespoons and chopped them up. For me, butter tarts should always have raisins! But you can skip them or use chopped walnuts or pecans in their place.
- For truly gooey butter tarts, remove them from the oven when the very center of the tarts still look a little wet. They will continue to firm up a bit as they cool.
Storage
These tarts are best served within a few days, as they lose their gooeyness as they sit. I recommend storing them in an airtight container on your counter.
More delicious keto tart recipes
- Keto Lemon Curd Tart
- Cannoli Tart
- Rhubarb Crumble Tart
- No Bake Chocolate Mousse Tart
- Tomato Goat Cheese Tart
- Caramelized Onion and Gruyere Quiche
Keto Butter Tarts
Ingredients
Pastry
- 1 ¼ cup almond flour
- 3 tablespoon powdered Swerve Sweetener
- 1 teaspoon baking powder
- ¼ teaspoon salt
- ¼ teaspoon xanthan gum
- 1 large egg
- 2 tablespoon butter melted
Filling
- ¼ cup butter
- ⅓ cup Swerve Brown
- ⅓ cup allulose (or BochaSweet)
- ½ cup heavy whipping cream
- ½ teaspoon caramel extract (or vanilla extract)
- ¼ teaspoon xanthan gum
- ⅛ teaspoon salt
- 1 large egg
- 2 tablespoon raisins or dried currants chopped
Instructions
Pastry
- Preheat the oven to 325F and lightly grease a non-stick muffin pan.
- In a large bowl, whisk together the almond flour, powdered sweetener, baking powder, salt, and xanthan gum. Stir in the egg and melted butter until the dough comes together. Gather the dough into a ball.
- Dust a work surface lightly with more almond flour and transfer the dough to the work surface. Cover the dough with waxed paper or parchment paper and roll out to an even ⅛" thickness.
- Cut out tart crusts into 3 ½ inch circles (I used a drinking glass). Use an offset spatula to carefully lift each crust off the work surface. Press lightly into the prepared muffin cups.
- Gather the pastry scraps and roll out again. You can re-roll this dough as much as you like and you should get 12 pastry circles.
- Place the muffin pan in the freezer while preparing the filling.
Filling
- Combine the butter and sweeteners in a medium saucepan over medium heat. Bring to a boil and cook 3 to 5 minutes, watching carefully to make sure it doesn't burn.
- Remove from heat and add the heavy cream and vanilla extract. (The mixture will bubble vigorously, this is normal).
- Sprinkle the surface with the xanthan gum and whisk vigorously to combine. Whisk in the salt. Set aside to cool while preparing the pastry. Let cool 10 minutes.
- Once cooled, whisk in the egg.
To assemble
- Divide the chopped raisins among the tart shells and spoon the filling over top. Fill each crust almost all the way.
- Bake 18 to 22 minutes, until the tart edges are golden and the filling is mostly set with a little jiggle in the center (it should still look a little wet in the very center of each tart).
- Remove from oven and let cool completely, then use a knife to loosen each tart.
Michelle says
Followed the recipe exactly and tarts turned out! Not exactly like old fashioned butter tarts but I really liked them and loved that they were not too sweet. Thank you for the recipe…I will definitely make again
Carolyn says
Glad to hear it!
Dimple says
Hi
I can’t wait to make these, they look delicious.
I was wondering if I can replace heavy whipping cream with coconut cream to make it mostly dairy free?
Thank you
Carolyn says
I can’t say for sure as I haven’t tried it.
Ivan says
I am all thumbs when it comes to baking and I struggled with the crust rolling and cutting…this is where some fingers would come in handy 🙂 Overall, I persevered and the tarts came out great according to my wife (who, yes, did provide me with some pointers, so I can’t take all of the credit). Maybe I cooked them a bit too long, but the filling is still pliable. Nice texture and flavour. So, if I can have success, anybody else will too when making these butter tarts. Thanks for sharing the recipe!
Carolyn says
Glad they worked out!
Annabelle says
Instead of swerve brown, can I add an extra tsp of molasses to get that brown sugar flavour? I think you have suggested this in another recipe?
Carolyn says
Yes, that should work!
Shannon Austman says
Would I have to change anything to make them in my tart tins instead of muffin tins?
Carolyn says
Make them smaller? I think that should be it!
Amy Wright says
Hi I was wondering if I could use this butter tart recipe for individual pie crusts for a coconut pie recipe? Does anyone know if it would work well for that?
Carolyn says
Do you mean like coconut cream pie? https://alldayidreamaboutfood.com/coconut-cream-pie-low-carb-and-gluten-free/
They should, but you will need to bake them until fully cooked, since coconut cream goes in after the crust is baked.
Susan Ward says
Carolyn,
I made your keto butter tarts yesterday!! They are absolutely amazing!! I learned to love them as a kid, vacationing in Muskoka!! Thank you so much for creating this wonderful keto version of these beloved butter tarts!!
Respectfully,
Susan Ward
Carolyn says
Wonderful!
Krystyna says
I am allergic to Almonds, Cashews, and Hazelnuts. What can I use to make this recipe? Thanks
Carolyn says
Sorry, I am really not sure.
Ellen says
Instead of almond flour maybe try sunflower seed flour or sesame seed flour, may need a bit more or less depending on moisture content.
Mattie McDaniel says
They look delicious!
Mattie says
The recipe calls for xanthum gum in the tart shells – but doesn’t list it in the instructions- do you use it in the crust?
Carolyn says
Sorry about that. It goes in with the dry ingredients.
Pat says
Oh my! I was looking through your recipes and when this popped up I was transported to a little town in Ontario, Thornberry for their butter tarts! I loved the ones with raisins but still fantastic without. My mom was born in Meaford.
I must make these!! Thank you!