Vegan Strawberry Rhubarb Crumble Bars
3.50 from 2 votes

These vegan strawberry rhubarb crumble bars are a perfect way to celebrate strawberry season! They feature a soft cookie layer, a quick, sweet strawberries and rhubarb, and a classic crumble topping. They also happen to be gluten-free.

An overhead image of a plant-based strawberry rhubarb crumble bar, resting on a fluted white plate.

Am I the only one here who’s just a little intimated by rhubarb?

I love its beautiful color, and I almost always love the foods that are made with it, including jam and pie. But this sturdy ingredient always strikes me as a little daunting.

These vegan strawberry rhubarb crumble bars were developed with my desire to get to know rhubarb a little better. As I made them, I developed a whole new appreciation of rhubarb and its tart flavor—a flavor that perfectly balances the sweetness of ripe strawberries.

A white, rectangular baking dish is filled with a strawberry dessert.

What is rhubarb?

Rhubarb is the edible stalk portion of a vegetable that has a leafy, non-edible top. It has a famously tart flavor. This is why rhubarb is most often included in recipes that are sweetened. It’s also part of why it pairs so well with sweet, juicy strawberries.

How to make strawberry rhubarb crumble bars

This recipe was inspired by my blueberry breakfast bars. They’re one of the most popular baked goods from my blog!

To make the bars, you make a dense, soft bottom layer. I use some mashed banana in the base to help replace egg. It’s an easy mixture to prepare, and you simply spread it in the bottom of a prepared baking dish.

The strawberry rhubarb layer is super easy to prepare: just a matter of mixing strawberries and chopped rhubarb with sugar and tapioca starch. The fruit layer is spread over the dense bottom layer of the bars.

Finally, you’ll prepare a traditional crumb topping and sprinkle it on top of the fruit. The crumble topping is what makes these bars as fun and delectable as they are!

Can I use regular flour?

The strawberry rhubarb crumble bars are gluten-free thanks to the use of oat flour. You can purchase oat flour, but you can also make it from scratch. To do this, place oats into a food processor fitted with the S blade and then whirl them until they’ve formed something resembling flour.

If you’re not gluten-free it’s also totally fine to prepare the recipe with all-purpose flour! You can use the same amount of unbleached, all-purpose flour in place of oat flour.

An angled photo of a vegan strawberry rhubarb crumble bar, which is served on a small white dessert plate. There's a rectangular baking dish in the background.

Storing and freezing

You can store the strawberry rhubarb crumble bars in an airtight container at room temperature for up to three days. After that, I recommend storing them in the fridge. They can be stored for about five days total.

If you’d like the bars to last longer, you can freeze them for up to six weeks! I like to freeze them individually and defrost them one by one for breakfast and treats.

Serving strawberry rhubarb crumble bars

These strawberry rhubarb crumble bars is that they bridge the gap between breakfast and dessert. You could enjoy them with a smear of nut butter and some fresh fruit for a sweeter breakfast or brunch.

You could also serve them with a nice dollop of sweet cashew cream for dessert. No matter how or when you decide to eat the bars, I think you’ll find them to be sweet, nutty, buttery, and satisfying.

Filling variations

This bar recipe would be a great template for many other fruit flavors. You can use four cups of blueberries, cherries, chopped peaches, or chopped apples. Change up the fruit filling according to the seasons and what you’re craving.

A small white dessert plate has been topped with a rustic, plant-based fruit dessert that's cut into a square shape.
An overhead image of a plant-based strawberry rhubarb crumble bar, resting on a fluted white plate.
3.50 from 2 votes

Vegan Strawberry Rhubarb Crumble Bars

Author – Gena Hamshaw
Prep Time: 10 minutes
Cook Time: 55 minutes
Total Time: 1 hour 5 minutes
Yields: 12 servings

Ingredients

*For the base*:

  • 1 3/4 cups oat flour
  • 1 cup rolled oats
  • 1 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1 teaspoon cinnamon
  • 1 ripe banana, mashed
  • 1/3 cup almond, oat, soy, or cashew milk
  • 1/4 cup melted coconut oil or vegan butter
  • 1/3 cup maple syrup
  • 1 teaspoon vanilla extract

*For the rhubarb and berry filling*:

  • 3 cups strawberries, halved or quartered
  • 1 cup chopped rhubarb
  • 3 tablespoons organic sugar
  • 3/4 tablespoon tapioca starch

*For the crumble topping*:

  • 3/4 cup rolled oats
  • 1/2 cup almond flour
  • 1/4 cup organic brown sugar
  • 1/4 teaspoon salt
  • 1/4 cup melted coconut oil

Instructions

  • Preheat your oven to 350F.
  • Mix the oat flour, oats, baking soda, salt, and cinnamon together in a large mixing bowl. Whisk together the mashed banana, almond milk, coconut oil, maple syrup, and vanilla. Add the wet ingredients to the dry ingredients and mix well to combine. The mixture should be thick but easy to mix with a spoon or whisk. If it’s too sticky, add an extra few tablespoons of milk. Transfer this mixture to an oiled 8 x 8 or 9 x 9 square baking dish.
  • Toss the strawberries, rhubarb, sugar, and tapioca starch together and mix well. Spread this mixture over the base layer in the baking dish. Place the baking dish in the oven and bake for 15 minutes.
  • Place the oats, almond flour, brown sugar, salt, and melted coconut oil together in a food processor fitted with the S blade. Pulse until the mixture has formed nice, big crumbs. Remove the baking dish from your oven and sprinkle this mixture over the rhubarb and strawberry layer (which should be releasing some liquid by now, and even bubbling at the edges). Bake for another 20-25 minutes, or until the top is brown and the strawberry rhubarb layer has thickened up. Place the baking dish on a wire rack to cool completely. Cut into 9 or 12 squares, and serve.

A fruit studded dessert bar, which is resting on a small white fluted plate. It rests on a white backdrop.

Enjoy the bars, all!

xo

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Categories: Recipes, Bars & Brownies, Fruit Desserts, Snacks
Method: Oven
Dietary Preferences: Soy Free, Vegan
Recipe Features: Meal Prep

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    22 Comments
  1. The ingredients say baking powder but the recipe says soda — which is it? Looks yummy, want to do it right!

  2. As someone who’s spent her whole life with a rhubarb plant in the front garden (and it’s the only truly edible thing ever produced in our garden- unless you count an 1/8 inch radish) I’m not scared of rhubarb. But as a graduate from Rhubarb U- I can tell you that you have totally nailed this recipe!

  3. Yum! I don’t think I’ve ever bought fresh rhubarb before. They have a bunch of it at my local farmer’s market, so I am going to pick some up and try this recipe! 🙂

  4. I’m impressed how you managed to mash up breakfast and dessert with your strawberry rhubarb crumble bars. I love rhubarbs and this recipe totally gets a thumb up for me

  5. I made this recipe last night for dessert and now am eating it for breakfast this morning! It is very versatile and delicious! My mother has tons of rhubarb in her garden every year and always gives me lots to put in my freezer. I am always looking for recipes to use it in. I still had some in my freezer from last year so I pulled it out and used it for this recipe along with some frozen blueberries, raspberries, and strawberries. I’m having it with a smear of almond butter and dollop of plain coconut yogurt so it tastes breakfast-ey! Thanks for a great recipe:)

  6. Love rhubarb season! I also made a rhubarb crumble on the weekend, the first of the year, and we also demolished it in a single evening. As a kid we had rhubarb growing in the back yard and my parents used to try and pawn it off as a dessert which we were having none of, but as an adult I so appreciate it’s tartness and the complex flavours it brings to the table. I’ll definitely be trying these bars with my next batch of rhubarb. Thanks Gena!

  7. Wow – what a great sounding bar! I am totally not intimidated by rhubarb at actually. I tend to keep it simple though, with things like crumbles and such. But my absolute favourite way of enjoying it is in soup. Gives it a fun, tart flavour =)

  8. Hi Gena,

    These look delicious – and it’s so great they’re vegan too! I giggled a little at you “bridging the gap between breakfast and dessert” – that’s definitely something I’d love to wake up to!

    Besma (Curiously Conscious)

  9. I love the strawberry rhubarb combination and I really want to try these! The last time I cooked rhubarb myself was when I was about 7 years old and one of my best friends and I nearly burned down her parents’ kitchen. We boiled rhubarb that grew in her garden (I don’t even think we washed it) and tried to combine it with cookies that we didn’t use a recipe for that melted all over their oven. Disaster. Anyway, I’ve learned a few things since then so I’m sure making these bars won’t be a problem 😉

  10. I’ve always been intimidated by rhubarb too. I think I’ve used it in a recipe one time. But these look so good that I may have to try it again.

  11. These bars look pretty amazing! I’ve never purchased rhubarb, but now I think I might have to! 🙂

  12. I LOVE rhubarb. Up north here, it grows like crazy in my mother-in-law’s and many of my friends’ gardens and so once our rhubarb season is upon us (we’ve still got at least a month to wait!), I’ve got a seemingly endless supply of the bittersweet fruit for the summer. It’s also wonderful just gently stewed on the stove with a bit of sweetener and added to oatmeal (or ice cream!). XO

  13. Oh, Gena. Blake is going to go bananas when I make these for him. Every spring when rhubarb is in season he requests a strawberry rhubarb pie. But, I often don’t have the time or patience to make pie. But, this looks easy to make and includes many of his favourite foods, including oats and banana. I can’t wait to make it for him!

  14. Nope you’re definitely not the only one, rhubarb freaks me out too! I applaud you for taking it on and creating something so delicious out of it. You are encouraging me to buy some next time I see it…maybe 🙂