Gluten-free raspberry bars! Brown sugar oat crumble and homemade raspberry filling are a match made in heaven. This is one of my favorite summer desserts!
The tricks to perfect filling every time are to use frozen raspberries instead of fresh and add 1 tablespoon of gluten-free flour to the mixture. Check out this post for all the tips!
These gluten-free raspberry bars are one of my favorite recipes for summer. It’s like your favorite fruit crumble or cobbler, but in a portable form that’s easy to serve to a crowd!
As someone with Celiac disease, I always make sure my gluten-free recipes taste JUST as good as the original. And this dessert is no exception! I swapped out regular oats and flour for gluten-free versions, and the result is just as delicious!
The buttery cookie crust is reminiscent of a perfect oatmeal cookie, and the homemade raspberry filling balances out the flavors with a bit of tartness and zing. Then you top the gluten-free raspberry bars off with more crumble — because you could never have too much!
I have found that frozen raspberries work even better than fresh raspberries, giving bars the perfect consistency and flavor. That’s great news, because it means you can make these gluten-free raspberry bars any time of year!
I love this recipe so much and I know you will too!
For more gluten-free bar recipes, try these gluten-free s’mores bars, gluten-free lemon bars, gluten-free 7 layer bars, gluten-free blondies, and gluten-free brownies.
You also might like this gluten-free apple crumble and gluten-free peach crisp.
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Why You’ll Love This Recipe
- Simple ingredients
- Perfect summer dessert
- Great for large crowds
- Uses frozen raspberries
Ingredients You’ll Need
Ingredients You’ll Need for the Crumb Bars
Here’s what you’ll need to make the crumble for the base and topping:
- Gluten-free oats: Be sure to use certified gluten-free oats to keep these bars gluten-free. I prefer the texture of rolled oats. Check out this post on are oats gluten-free?
- Gluten-free 1:1 baking flour: Use a high-quality 1:1 gluten-free baking flour that contains xanthan gum. It makes all the difference in the final results of these gluten-free raspberry bars!
- Brown sugar: Any brand of brown sugar will work for this recipe. It adds an essential sweetness that works so well with the oats and butter — just like your favorite oatmeal cookie!
- Butter: I like to use salted butter for this recipe. It gives the gluten-free raspberry bars more depth of flavor! You could also use dairy-free butter if you want to make these gluten-free and dairy-free.
- Baking powder and salt: Baking powder helps the crust rise, while salt balances the sweetness. You also might like this article on is baking powder gluten-free?
Ingredients You’ll Need for the Raspberry Filling
Here’s what you need for the raspberry filling:
- Frozen raspberries: I find frozen raspberries work even better than fresh raspberries in this gluten-free raspberry bars recipe. You want to drain off the extra liquid after thawing the raspberries so the filling will set. I also like to use frozen berries in this easy, berry lemonade!
- Lemon juice: Lemon juice brings out the raspberry flavor and adds a little bit of a bright zing to the filling. Real, fresh lemon juice will deliver the best results!
- Sugar: Domino granulated fine sugar is my personal favorite, but any white sugar will work.
- Gluten-free 1:1 baking flour: Use a high-quality 1:1 gluten-free baking flour that contains xanthan gum. It makes all the difference in the final results of these bars!
- Cornstarch: Cornstarch is a naturally gluten-free ingredient that helps thicken up this raspberry filling.
If you love raspberry, try these recipes for raspberry coulis and raspberry compote.
You also might like these recipes for strawberry compote and how to make fruit compote.
How to Make This Recipe
Make the Oatmeal Crumble
- Preheat the oven to 350F. Line an 8×8 or 9×9 baking pan with parchment paper. Lightly spray with cooking spray.
- In a large bowl, combine the oats, gluten-free flour, brown sugar, baking powder, salt and butter with a fork into a crumble-like mixture.
- Press ⅔ of the mixture into the bottom of the prepared baking pan. Bake for 10 minutes.
Make the Raspberry Filling
- Place raspberries in a medium, microwave-safe bowl. Microwave until just thawed, 2-3 minutes, stirring halfway through. (You can also thaw raspberries on the stovetop over medium heat.)
- Drain any excess liquid off the raspberries and return to the bowl.
- Add the sugar, gluten-free flour, cornstarch, and lemon juice and mix to combine.
Assemble/Bake
- Pour the raspberry mixture on top of the baked bottom of the gluten-free raspberry bars crust. Sprinkle the top of the raspberries with the remaining crumble topping.
- Bake gluten-free raspberry bars for another 25-30 minutes, until golden and bubbly.
- Let the gluten-free raspberry bars cool completely before slicing and serving. Enjoy!
Storage Instructions
Store raspberry oatmeal bars in an airtight container at room temperature for up to five days.
FAQs
Your raspberry filling may turn out running if you don’t use enough cornstarch in the raspberry mixture, or if you don’t bake your raspberry bars long enough. It’s also important to let your bars cool completely before slicing. The filling sets up during this cooling period!
The crust ingredients for raspberry crumble bars includes flour, oats, brown sugar, baking powder, and salt. The filling is made with frozen raspberries, cornstarch, lemon juice, sugar, and flour. The bars are then topped with another layer of oat cumb topping.
Yes! You can easily make raspberry bars gluten-free by using gluten-free flour and gluten-free oats. The raspberry filling can be thickened using cornstarch and more gluten-free flour.
Expert Tips & Tricks
- I find frozen raspberries work even better than fresh raspberries in this gluten-free raspberry bars recipe. You want to drain off the extra liquid after thawing the raspberries so the filling will set.
- Be sure to use certified gluten-free oats to keep these bars gluten-free. I prefer the texture of rolled oats for these gluten-free raspberry bars.
- Use a high-quality 1:1 gluten free flour blend that contains xanthan gum. It gives you a much better texture with these gluten-free bars!
- For dairy-free bars: Replace butter with vegan butter (dairy-free butter), and follow the rest of the recipe as usual.
MORE GLUTEN-FREE RECIPES
I hope you love this recipe as much as we do! If you try these gluten-free raspberry bars, be sure to leave me a comment/rating below. I’d love to hear from you!
Gluten-Free Raspberry Crumb Bars
Ingredients
Raspberry Filling:
- 12 ounces frozen raspberries
- 1/4 cup granulated sugar
- 1 tablespoon gluten-free 1:1 baking flour
- 2 teaspoons cornstarch
- 1 tablespoon lemon juice
Oatmeal Crumble:
- 1 ½ cups (128g) gluten-free rolled oats
- 1 ¼ cups (188g) gluten-free 1:1 baking flour
- 1 cup (210g) brown sugar
- ½ teaspoon baking powder
- ¼ teaspoon salt
- 3/4 cup (170g) salted butter, melted
Instructions
Make the Oatmeal Crumble
- Preheat the oven to 350F. Line an 8×8 or 9×9 baking pan with parchment. Lightly spray with cooking spray.
- In a large mixing bowl, combine the oats, gluten-free flour, brown sugar, baking powder, salt and butter with a fork into a crumble-like mixture.
- Press ⅔ of the mixture into the bottom of the prepared baking pan. Bake for 10 minutes.
Make the Raspberry Filling
- Place raspberries in a medium, microwave-safe bowl. Microwave until just thawed, 2-3 minutes, stirring halfway through.
- Drain any excess liquid off the raspberries and return to the bowl.
- Add the sugar, gluten-free flour, cornstarch, and lemon juice and mix to combine.
Assemble/Bake
- Pour the raspberry mixture on top of the baked bottom crust. Sprinkle with remaining crumble.
- Bake for another 25-30 minutes, until golden and bubbly.
- Let the bars cool completely before slicing and serving. Enjoy!
Notes
- I find frozen raspberries work even better than fresh raspberries in this gluten-free raspberry bars recipe. You want to drain off the extra liquid after thawing the raspberries so the filling will set.
- Be sure to use certified gluten-free oats to keep these bars gluten-free. I prefer the texture of rolled oats for these gluten-free raspberry bars.
- Use a high-quality 1:1 gluten free flour blend that contains xanthan gum. It gives you a much better texture with these gluten-free bars!
- For dairy-free bars: Replace butter with vegan butter (dairy-free butter), and follow the rest of the recipe as usual.
I love raspberry bars and love making them for guests. Thanks for a gluten-free version for when my sister-in-law visits. Delish!
These were so tasty and easy to make! Thank you for the easy recipe!
My kids love these!! They love anything with raspberries! They are absolutely delicious!!