Gluten Free Rhubarb crumble
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Gluten-free Rhubarb and Apple Crumble Pie is great as a dessert or afternoon snack to pair with tea or coffee. It has all the marvellous fruity tangy flavours you can imagine. It is gluten-free and you could also say it is ketogenic due to its high content in good fats and low carbs. Even though this recipe has some sugar you can totally substitute it for stevia, erythritol or any sweetener of your choice.

The pie crust is made like a dough but it can be totally made with Digestive biscuits, Maria cookies or Graham crackers if you don’t have gluten sensitivity, but I like this crust because it is denser and cookie-like and taste so nutty that you’ll love it, also it is gluten-free.

rhubarb and apple crumble pie with mint chocolate icecream
Gluten-Free Rhubarb & Apple Crumble Pie with mint chocolate chips ice cream

Let’s talk about filling…

Many people like more texture or not so tender fruit, so I leave that up to you make it as you desire consistency, in the end, all will taste the same.

When it comes to topping or crumble I like it sweet and crunchy that is why I made it with rolled oats and nuts and leave it in the oven until golden brown, but keep an eye on because can easily burn because of the fat content in the nuts.

Once the Gluten-free Rhubarb and Apple Crumble Pie it is done and cold from the fridge, what I do is, pop it in the microwave for 30 sec and scoop a ball of my homemade mint chocolate gelato. At first, I wasn’t sure if will go with it but I nailed it! Soooooo delicious my mouth watery every time I think of it.  Also, you can top it up with whipped cream or cream and custard.

Although it is a healthy dessert you should know that one serving size has a high content in good fats that will transform into calories and if you are looking after yourself I would suggest having half of serving or try to fit it in your cheat meal of the week for guilt-free. Don’t forget to work out that day so you are helping your body to burn all those calories faster.

Hope you enjoy my recipe and give it a go, snap a picture tag me on Instagram @ikarlina_l #ikarolina_l so I can see it. Also, I am on Pinterest iKarolinaL and Facebook ikarolinal . It will make my day.

Share this recipe for Gluten-Free Rhubarb and Apple Crumble Pie on social media

This is my recipe for Gluten-Free Rhubarb and Apple Crumble Pie. If you like the recipe then consider sharing it with other gluten-free desserts lovers on social media.


Recipe by iKarolinaCourse: Dessert, RecipesDifficulty: Medium


Prep time


Cooking time




Total time






  • CRUST:
  • 96 g Almond Flour or hazelnut flour (*see notes)

  • 40 g Coconut Flour (*see notes)

  • 35 g Oat Flour (*see notes)

  • 40 g Cornstarch/tapioca flour/arrowroot flour (*see notes)

  • 30 g Cold butter unsalted, cubed

  • 70 g Erythritol any other sweetener

  • 20 g Coconut sugar

  • 1/2 tsp Himalayan Pink Salt

  • 1 Large egg

  • 1 tsp Cinnamon

  • 1/8 tsp Xantham gum (*see notes)

  • Almond milk (optional as needed)

  • 380 g Mixed apples (gala, granny smith, yellow) ( peeled, cored and sliced )

  • 369 g Rhubarb stalks (cleaned, and cut into 1.5 inches long)

  • 34 g Coconut sugar

  • 40 g Erythritol

  • 20 g Moscavado sugar or increase the coconut sugar

  • 18 g Corn Flour (*see notes)

  • 6 g Cinnamon

  • 1 g Nutmeg

  • 1/4 tsp Cloves

  • 2 tbsp Lemon or lime juice

  • pinch Pink Himalayan Salt

  • 100 g Jumbo Oats (old fashioned rolled*)

  • 30 g Almond Flour or Hazelnut flour (*see notes)

  • 15 g Erythritol

  • 15 g Coconut sugar (I use this)

  • 5 g Coconut Flour (*see notes)

  • 1/2 tbsp Cinnamon

  • 20 g Coconut oil (extra virgin melted) I use this

  • 30 ml Maple syrup

  • 30 ml LakantoMaple Syrup

  • 70 g Nuts (any kind or a mixed)

  • 10 g Coconut Shredded (unsweetened)

  • 5 g Flaxseed milled

  • 5 g Chia seeds milled


  • CRUST:
  • Combine all dry ingredients mix well, place the dry mix in a food processor add the cold butter, pulse a several times until mixture resembles wet sand, now transfer the mixture to a bowl and add the beaten egg and mix with your hand now try to form a dough ball if still too crumbly add 1 tbsp of Almond milk mix again if you need more repeat 1tbsp at the time.
  • Slightly grease your pie dish with some butter or coconut oil.
  • Now you have two options. First option: place the dough ball between two pieces of cling film or parchment paper and with a rolling pin extend until form a round shape, peel off the paper and place the pie dish on top, flip the dough and dish, peel off the other layer of paper and with your fingers press down the dough tight to the pie dish, poke several times with a fork and place in the fridge for 30 min. Second option: place the dough in the prepare pie dish and with your fingers start to extend the dough all over the bottom and walls of the dish, with a fork poke the crust several times and place in the fridge for 30 min.
  • While the crust is in the fridge pre-heat the oven at 180C.
  • When the time mark has reached the 30 min bake the crust for 15min to 20min or until starting to get golden edges and light golden brown.
  • Cooldown at room temperature while preparing your filling.
  • Clean your apples, peel, cored and slice them finely, you can use a knife or your food processor with the slicing disc attachment or any hand slicing device that you have.
  • Clean your rhubarb, cut the leaves and bottom you only need the red greenish part and cut into 1.5 inches chunks.
  • Place the apples in a medium-big pot along with the sugars, erythritol, cinnamon, nutmeg, cloves, salt, lemon or lime juice give it a good mix now add the corn starch and mix again. Turn on the stove to a medium heat cover with a lid and stir from time to time, when apples have 5 to 10min cooking add the Rhubarb, I do this because the rhubarb tends to cook quicker than the apples but if you like the rhubarb turn into a compote and has the apples tender cooked and a bit chewy add everything from the beginning. Taste for sweetness with a clean spoon (do not place inside the spoon after you put it in your mouth take another clean one or wash the same one) add more sweetener if you need to so. Cook until apples are tender or as you desire.
  • Turn off the stove and set aside to cool down at room temperature.
  • Place the oats to a food processor and pulse until coarse, not flour, if don’t have a food processor use steel-cut oats, transfer to a bowl
  • Add the nuts to a food processor and pulse again until small pieces, if you don’t have a food processor, place the nut in a zip lock or frozen bag close properly and using a rolling pin hit it until small pieces, now transfer to the bowl with the oats, and add the rest of the dry ingredients and mix well.
  • Now add the coconut oil and maple syrup and stir with a spatula or your hands (I prefer this).
  • Pre-heat the oven at 180C
  • Pour your cooled apple mixture on the pie crust and with a spatula extend it that covers all the crust.
  • Now with your hands spread all the crumble mixture over the filling without leaving any filling without the crumble
  • When the oven has reached the temperature, bake the pie for 25 to 30 min or until crumbles deep golden brown and smell like heaven
  • Let it cool down at room temperature completely before placing in the fridge.
  • When ready to eat you can heat it up for 30 sec in the microwave add a scoop of ice cream (I tried with my mint chocolate ice cream and was to die for) or eat it just like that or cold as you wish, the world is endless my friend.
  • ENJOY!

Recipe Video


  • *Make sure all ingredients are gluten-free certified if you have gluten sensitivity

Nutrition Facts

8 servings per container

Serving Size1g

  • Amount Per ServingCalories425
  • % Daily Value *
  • Total Fat 22.3g 35%
    • Saturated Fat 4.2g 22%
    • Trans Fat 0g
  • Cholesterol 0mg 0%
  • Sodium 151.7mg 7%
  • Potassium 255.9mg 8%
  • Total Carbohydrate 6.5g 3%
    • Dietary Fiber 8.3g 34%
    • Sugars 13.2g
  • Protein 10.2g 21%

  • Vitamin A 2.1%
  • Vitamin C 8.6%
  • Calcium 7.7%
  • Iron 4.3%

* The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

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