Gluten Free Blackberry Crumble Bar

Published on Jun 22, 2023

  by   Kristina Stosek

2 reviews

Prep Time: 15 minutes Cook Time: 40 minutes Serves: 8 - 10
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This gluten-free blackberry crumble bar combines sweet blackberries and a buttery shortbread crumble crust. Each bite is filled with a layer of fresh, juicy blackberries bursting with natural sweetness and a melt-in-your-mouth buttery, crumbly goodness. The magic happens when the blackberries and crumble crust come together. As you take a bite, the flavors meld deliciously in your mouth.

4 stacked gluten free blackberry crumble bars

Let’s talk about the gluten free crumble crust. 

The crust is made using a gluten-free flour blend, butter, lemon zest, vanilla, and sugar. The shortbread-style crust is buttery and crumbly, giving it a satisfying texture that complements the softness of the blackberries.

But there is more. The gluten-free blackberry crumble bar has a slight hint of fresh lemon and vanilla flavor in the crumble, adding a warm and aromatic touch to the shortbread crust.

For this crumble bar recipe, you can make your blackberry jam at home, as it takes less than five minutes to make. Or you can use a combination of fresh blackberries and jam of choice. I recommend using blackberry, raspberry or strawberry jam.

halved blackberries on a plate

Things to know about blackberries

Q: What are blackberries?

A: Blackberries are small, dark-colored berries that belong to the Rosaceae family. They are known for their sweet and juicy flavor.

Q: Are blackberries good for you?

A: Yes, blackberries are highly nutritious. They are packed with antioxidants, vitamins (such as vitamins C and K), minerals (including manganese and copper), and dietary fiber. They also have a low glycemic index and are relatively low in calories.

Q: How do you pick ripe blackberries?

A: When picking blackberries, look for uniformly dark and plump berries. They should be easily removed from the stem without excessive force. Ripe blackberries will have a sweet aroma and feel slightly soft.

Q: How should I store blackberries?

A: Blackberries are delicate and perishable, so consuming them as soon as possible is best. If you need to store them, place the unwashed berries in a single layer on a paper towel-lined container or tray, and refrigerate. Avoid washing the berries until ready to use them, as moisture can accelerate spoilage.

Q: Can I freeze blackberries?

A: Yes, blackberries freeze well. To freeze them, wash the berries gently and pat them dry. Spread them in a single layer on a baking sheet and place them in the freezer until firm. Once frozen, transfer the berries to a freezer bag or airtight container and keep them in the freezer for up to six months.

Q: How can I incorporate blackberries into my diet?

A: Blackberries can be enjoyed in various ways. They make a delicious addition to smoothies, yogurt, oatmeal, salads, or as a topping for desserts like pies, tarts, and ice cream. You can also use them to make jams, jellies, or sauces.

Q: Are blackberries the same as raspberries?

A: No, blackberries and raspberries are different fruits, although they belong to the same family. Blackberries are generally larger and darker, while raspberries are typically smaller and come in shades of red. Blackberries are also more tart, while raspberries are sweeter.

blackberry jam in a glass bowl

how to make quick and easy blackberry jam (makes 1 cup)

  1. 2 cups fresh blackberries, they should be ripe 
  2. 1/2 cup brown or granulated sugar
  3. 1 Tbsp. tapioca starch


Prepare the blackberries: Rinse the berries under cold water and remove any stems or leaves. Pat them dry gently using a clean kitchen towel.

Mash the blackberries: Place them in a saucepan and use a potato masher or fork to mash them. Leave some chunks for texture.

Add sugar. Stir in sugar until well combined. Let the mixture sit for about 15 minutes, allowing the sugar to dissolve and the berries to release their juices.

Cook the jam: Stir in tapioca starch, place the saucepan over medium heat, and bring the mixture to a gentle boil. Stir occasionally to prevent sticking and simmer until it thickens, about 3 minutes. Set aside to cool. 

Your easy homemade blackberry jam is now ready to use in the recipe.

8 sliced crumble bars

Which coconut oil should you use in baking?

Whether you follow a plant-based diet or are sensitive to dairy, coconut oil is a good substitute for butter in this recipe. However, when it comes to choosing coconut oil for baking, consider a few factors:

Unrefined vs. refined: Unrefined coconut oil, also known as virgin or extra virgin coconut oil, is extracted from fresh coconut meat and retains its natural coconut flavor and aroma. It’s minimally processed and considered the healthier option.

Refined coconut oil, on the other hand, undergoes further processing, including deodorization and bleaching, resulting in a neutral flavor and higher smoke point. Both types can be used for baking, but unrefined coconut oil adds a distinct coconut taste to your baked goods.

Quality and source: Look for coconut oil made from high-quality coconuts and sourced responsibly. Organic and sustainably produced options are preferable, as they are free from pesticides and harmful additives.

Smoke point: The smoke point of coconut oil is important, especially for baking at higher temperatures. Refined coconut oil typically has a higher smoke point, making it suitable for baking recipes that require higher heat.

Texture: Coconut oil can be found in solid or liquid form, depending on the temperature. Solid coconut oil is commonly used in baking, as it helps to create the desired texture in pastries and crusts. Liquid coconut oil can be used as a substitute in some recipes, but it may affect the final texture.

Here are our favorite coconut oil brands for vegan blackberry crumble bars.

Nutiva Organic Virgin Coconut Oil

Garden of Life Organic Extra Virgin Coconut Oil

Carrington Farms Organic Extra Virgin Coconut Oil

Viva Naturals Organic Extra Virgin Coconut Oil

Ultimately, the best coconut oil for baking will depend on your preference, the flavor you desire in your baked goods, and the specific recipe you’re preparing. Experimenting with different brands and types of coconut oil can help you find the perfect choice for your baking needs.

overview of one blackberry crumble bar on a plate

gluten free blackberry crumble bars highlights

Gluten-free goodness: These bars are for those who follow a gluten free diet or have gluten sensitivities without compromising taste or texture.

Bursting with blackberries: The star ingredient – blackberries, adds a burst of natural sweetness and vibrant flavor to the bars. Each bite is filled with juicy blackberries, creating a delightful fruity experience.

Buttery and crumbly crust: The crust of the blackberry crumble bars is made with a gluten free flour blend, a hint of fresh lemon zest, and vanilla creating a buttery, crumbly, and tasty crust texture. The delicious base complements the softness of the blackberry filling.

Versatile treat: They are versatile and can be enjoyed warm or chilled. They are suitable for various occasions, including picnics, potlucks, or a sweet treat at home with a dollop of vanilla ice cream.

Customizable: The gluten-free blackberry crumble bars recipe can be easily customized to suit personal preferences. You can use berries of choice, adjust the level of sweetness, incorporate additional spices like cinnamon or nutmeg, and even make them dairy-free.

Easy to make: These 7 INGREDIENT gluten free crumble bars are exceptionally simple despite their deliciousness. You can whip up a batch of these delightful treats with a few basic ingredients in no time.

close up of a gluten free blackberry crumble bar

If you like crumble desserts try this Gluten Free Plum & Almond Crumble Snacking Cake or this Gluten-Free Blueberry Crumble.

Whether you have dietary restrictions or appreciate a delicious dessert, this gluten free blackberry bars recipe is not to be missed.

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Many thanks!

Kristina xx

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