Home » desserts » Keto Strawberry Rhubarb Crumble (Pie!!) 🍓

Keto Strawberry Rhubarb Crumble (Pie!!) 🍓

This keto strawberry rhubarb crumble (pie!!) screams early summer: beautifully tangy and bursting with flavor, topped off with a toasted almond crumble and all bundled up with my flaky pie crust.

Keto strawberry rhubarb crumble with a flaky gluten free pie crust

Keto Strawberry Rhubarb Crumble 🍓

With my suuuper flaky pie crust!

You’ve got two options here.

Whip it up as a crumble: I love using a skillet, simply toss the strawberries with the rhubarb (‘n sweetener of choice), top off with my (toasted!) almond crumble, et pretty much voila!

Or you bring in my flaky keto pie crust and turn it into a showstopper summer dessert.

The choice is yours, but either way I think a (no churn!) vanilla ice cream is pretty non negotiable ;).

Closeup creamy keto ice cream with vanilla bean
No-Churn Paleo, Low Carb & Keto Vanilla Ice Cream

The Filling (‘n Thickner)

Simply toss the strawberries, rhubarb, sweetener, orange zest and thickener together. 

While cornstarch is the usual choice for a pie of this type (a ‘dirty’ keto choice I suppose), tapioca or arrowroot are also a solid option too (still a starch, but grain free, paleo etc).

The Sweetener

Use your granular sweetener of choice here. Allulose will arguably give the least aftertaste, though Lakanto Golden (barely any cooling aftertaste here) and xylitol (non-corn though to avoid tummy troubles!) are solid options too.

And if using xylitol, make sure to be careful if you have a pup (or kitty!) around the house, as it’s highly toxic to the little guys!

Keto strawberry rhubarb crumble topped with a scoop of vanilla ice creamThe (Pie Crust!) Deets

When rolling out the pie crust, you may want to use parchment or wax paper. Given the lack of gluten, the crust is more fragile and it will break easily if not handled with care. So I suggest rolling it out between two sheets of parchment paper. Easy peasy.

If it begins to become unmanageable as it comes to room temperature (you know, and the butter melts away), just pop it into the freezer for a few minutes before carrying on.

One last thing. Like with any pastry dough, make sure not to over-process the dough. The mixture ought to resemble coarse breadcrumbs rather than cookie dough.

And just pinch together any cracks. No biggie either, just takes a little practice. 🙂

And… The Pie Crust Video Story!

Keto strawberry rhubarb crumble with a flaky gluten free pie crust

Keto Strawberry Rhubarb Crumble (Pie!!)

This keto strawberry rhubarb crumble (pie?!) screams early summer: beautifully tangy and bursting with flavor, topped off with a toasted almond crumble and all bundled up with my flaky pie crust.
5 from 3 votes
Prep Time 30 minutes
Cook Time 1 hour
Total Time 1 hour
Course Breakfast, Dessert
Cuisine American, European
Servings 10 slices
Calories 211 kcal


For the keto pie crust

For the (toasted!) almond crumble

For the strawberry rhubarb filling:

  • 380 g strawberries diced
  • 300 g rhubarb sliced into 1/2 inch pieces
  • 2/3 cup allulose or 1/2 cup erythritol and xylitol
  • 3 tablespoons arrowroot tapioca or cornstarch*
  • 1 tablespoon orange juice (or lime juice!) to taste
  • 1/2 teaspoon orange zest optional, but it gives a nice touch 🙂


  • If making a pie version: whip up a batch of my suuuper flaky keto pie crust and chill while you prepare the rest.
  • Make the crumble: lightly toast almond flour in a skillet or pan over medium heat, until fully golden and fragrant (2-4 minutes). This is very important taste-wise, so don't skip!
  • Whisk thoroughly together in a medium bowl the toasted almond flour, coconut flour, sweetener, xanthan gum and salt. Add in the butter and rub the mixture with your fingertips until it resembles coarse bread crumbs, and chill.
  • Preheat oven to 350°F/180°C and make your filling by tossing all the ingredients together in a large bowl.

If making a crumble

  • Add the strawberry rhubarb filling to a 9 inch skillet or baking dish (or even ramekins!).
  • Top with crumble mixture and bake for 35-40 , covering the crumble with foil once it begins to brown.
  • Allow to cool for at least 15 minutes to allow the flavors to mingle, or store refrigerated for up to 3 days. 

If making a pie

  • Roll out pie crust into a roughly 13-inch circle, between two sheets of parchment paper. Feel free to lightly dust with coconut flour as needed. Transfer to the pie dish, using the parchment paper as an aid. Freeze for 10 minutes (or refrigerate for 30).
  • Add the strawberry rhubarb filling, top with crumble mixture and bake for 35-40, covering the crumble with foil once it begins to brown.
  • My top tip: I suggest covering the fluted edges with foil from the start to avoid over browning.
  • Allow the pie to chill at room temperature for 3 hours (yeah, for real!). And enjoy all your hard work with a generous scoop of vanilla ice cream.



Please see post for deets on sweeteners and possible subs!
*If looking to reduce (or completely eliminate) the thickener, consider pre-cooking the filling in a saucepan on the stove top. This way you can reduce everything gradually, without turning your filling soggy. Not to mention its also a way to adjust the sweetener to taste. 


Serving: 1slice | Calories: 211kcal | Carbohydrates: 10g | Protein: 5g | Fat: 18g | Saturated Fat: 7g | Polyunsaturated Fat: 0.5g | Monounsaturated Fat: 3g | Trans Fat: 0.4g | Cholesterol: 26mg | Sodium: 86mg | Potassium: 151mg | Fiber: 4g | Sugar: 3g | Vitamin A: 339IU | Vitamin C: 26mg | Calcium: 69mg | Iron: 1mg
Keyword keto strawberry rhubarb crisp, keto strawberry rhubarb crumble, keto strawberry rhubarb pie
Whip up this recipe?Comment below or drop me a line @gnomgnom._ and tag #gnomgnomyum!


  1. Karen says:

    5 stars
    Can’t wait to try this!! Do you have the nutrition breakdown for this without the pie crust? Your recipes are always spot on and amazing!!

  2. Lynnae K Neuberger says:

    Yay, rhubarb!! I have the best Ruby rhubarb growing and I’m always looking for something fun to make with it. Can’t wait to try this (after the supply replenishes – too many friends needed rhubarb 😂). The best unadulterated rhubarb dessert is simply stewed rhubarb with sweetener and cinnamon, served over warm vanilla custard – because sometimes you just need that warm feeling. But, bring on pie season! 😊

  3. Holly says:

    5 stars
    Paola – is there an error in the filling…2/3 tsp Allulose..? I’m thinking maybe you meant 2/3 cup. Also, I know I’ve asked you this before but it didn’t get answered. Xanthan gum tears my stomach up do you know if glucomannan can sub in here? Thanks!

    • Thank you Holly, fixed! And re the xanthan gum sub, I would suggest using golden flaxseed meal instead (I haven’t tried, but I think 2 teaspoons soaked in a bit of warm water to make it gelatinous will work).

      In my experience glucomannan is a good sub when xanthan gum is used as a thickener (rather than a gluten replacement, as it is here).

  4. Leslie says:

    Paola, your website is fantastic. However, there are so many advertisements going all at once that it’s very challenging to stay on the page. Is there some way that could be remedied?

    • Thank you Leslie! You know, I know ads are such a pain… but they’re sort of ‘the price’ of free content.

      That said, that’s why I’m working on food (for thought) over on Substack and a ‘second part’ of this project. Who knows and perhaps eventually we can be advertiser free 😉

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