These Strawberry Rhubarb Bars are thick, soft and fruity! They are made with a buttery, oat and brown sugar cookie-like base topped off the simple strawberry-rhubarb fruit filling and topped with the final sprinkling of the simple crumble topping. Naturally gluten free with vegan and oat free options available!
Originally shared this recipe on June 29, 2015 – Updated July 25, 2022 with improved photos, recipe, tips and ingredient explanations.
Rhubarb season isn’t over just yet! Make the most of it it while you still can with these soft and crumbly strawberry rhubarb crumb bars!
Tart rhubarb, sweet strawberries and fiery ginger come together to make a delicious fruit filling, sandwiched between the brown sugar oat crumb mixture!
A few things I learned about rhubarb while making these:
- Rhubarb is a vegetable. Looking at them it makes sense because they look like celery stalks, but I always saw them pictured with berries or in lemonade in some type of dessert – I assumed they were a fruit!
- The color of the stalk doesn’t actually indicate ripeness. Different colors just mean that they are different types of rhubarb. Ripeness is indicated in the stalks. Rhubarb stalks should be about 1/2 an inch to 1 inch thick.
- The leaves are poisonous because of the high levels of oxalate – so don’t ever be tempted to eat them no matter how deliciously green they look.
Strawberry Rhubarb Bars
These bars come together quickly and easily with little effort. The process can be broken down into a few simple steps:
- Mix the strawberry rhubarb filling.
- Make the oatmeal cooking base and top.
- Bake and enjoy!
In a small bowl, combine the fresh strawberries, rhubarb, ginger, lemon juice, starch and sugar.
All you need is some gluten free flour, gluten free rolled oats, light brown sugar, cinnamon, baking soda, salt, vanilla extract and melted butter or oil. Mix together and that’s it. Half of the mixture will go down first, then top with the rest at the end.
The hardest part is not eating all the crumble before you actually get to baking it!
Make sure to partially bake the bottom crust before you add the fruit filling. This is to ensure the crust cooks fully into a perfect sturdy base.
If you don’t cook it first, the juices from the strawberry rhubarb layer will keep it soft. While I can attest that the bars themselves are still absolutely divine in flavor, it does make them a bit more difficult to handle.
After the initial crust bake, spread the filling over the crust then sprinkle the remaining crumb on top and that’s it. Bake until set, then cool and enjoy.
The only thing left to do is enjoy a bar with a scoop of vanilla ice cream and try not to eat the whole pan!
So, since rhubarb is actually a vegetable, these are healthy, right?
I’m pretty sure that means these should count as at least one of your five a day – strawberries, rhubarb, ginger.
I think I’ve just created a super food 👊
You’re welcome, and enjoy!
- 1 1/2 cups (250g) sliced strawberries
- 2 cups (240 g) rhubarb cut into 1/3 inch pieces or smaller
- 1 tablespoon (15 ml) lemon juice
- 1 tablespoon fresh ginger minced
- 1 tablespoon cornstarch
- 2 tablespoons (24g) white granulated sugar
Base & Crumb Topping
- 1 1/4 cup (175 g) gluten free all purpose flour blend
- 1 1/4 cup (112 g) certified gluten free quick oats
- 3/4 cup (165 g) light brown sugar
- 1/2 teaspoon baking soda
- 1/2 teaspoon sea salt (only add if using unsalted butter or coconut oil)
- 1/2 teaspoon cinnamon
- 3/4 cup (170g) melted vegan butter or (160 g) coconut oil
- 1 teaspoon vanilla extract
- In a medium bowl: combine the strawberries, rhubarb, lemon juice, ginger, corn starch and sugar. Mix together until combined, then set aside for later.
- Preheat your oven to 350°F/180°C. Lightly grease or line an 8x8inch (20x20cm) square baking pan with parchment paper. Set aside.
- In a large bowl whisk together the flour, oats, sugar, baking soda, salt, and cinnamon to make the crumble mixture.
- Stir in the melted butter and vanilla extract and mix until a soft dough forms.
- Spread half of the oat mixture across the bottom of the pan. Press firmly into the pan. Bake for 10 minutes then remove from the oven.
- Spread the fruit mixture in an even layer over the partially baked crust. Top with the remaining oat crust. Sprinkle it over the top of the fruit making sure to cover the majority of the surface.
- Place the baking dish back in the middle of the oven and bake for an additional 35-40 minutes or until the top comes out golden brown.
- Cool for at least 10 minutes before cutting into slices and store in an airtight container for up to five days.
- Recipe adapted from The Kitchn.
- These bars do come out quite soft - especially right out of the oven. A few readers have suggested popping them into the fridge for an hour or so before serving to help firm them up.