Strawberry Rhubarb Crumb Bars Recipe

I first made these strawberry rhubarb crumb bars on a lazy Saturday afternoon when I needed to use up the leftover fruit from a jam I’d made earlier that week so I tossed them together with what I had in the pantry and didn’t expect much. But once they came out of the oven golden and bubbling with that warm jammy center and buttery topping I knew they’d become one of my go-to bakes.

Now I make this strawberry rhubarb crumb bars recipe every spring and summer because it’s the perfect way to capture that sweet and tangy fruit flavor in an easy-to-share dessert. I love the balance of textures with the crisp crumble on top and the soft gooey filling in the middle.

Ingredients

• Here’s what I use for this recipe. You can always make substitutions if you prefer!
• Strawberries – Sweet and juicy these give the filling its bright flavor and beautiful pink hue.
• Rhubarb – Adds a tart bite that pairs perfectly with strawberries to create that signature tang.
• Granulated sugar – Sweetens the filling and helps draw out the fruit juices.
• Cornstarch – Thickens the fruit mixture to make sure it holds together in the bars.
• Lemon juice – Brightens the flavor of the filling and balances the sweetness.
• All-purpose flour – Forms the base and crumble topping giving structure and a tender bite.
• Rolled oats – Add chewiness and a rustic texture to the crumb topping.
• Brown sugar – Deepens the flavor of the crumble with warm caramel notes.
• Ground cinnamon – Adds a cozy hint of spice that complements the fruit.
• Baking powder – Helps lighten the base slightly so it doesn’t get too dense.
• Salt – Enhances all the flavors in both the crust and topping.
• Unsalted butter – Brings richness and binds the dry ingredients into a crumbly dough.

Tools You’ll Need

• Mixing bowls – I use one for the fruit filling and another for the crumb mixture.
• Pastry cutter or fork – Helps cut the butter into the dry ingredients for the perfect crumb texture.
• 9×13 baking pan – Ideal size to spread out the layers evenly and bake them to perfection.
• Wooden spoon or spatula – I use this to stir the filling and press the layers in place.
• Measuring cups and spoons – Ensures I keep the ratios just right for structure and sweetness.
• Knife – Useful for slicing the bars cleanly once they’ve cooled.

Instructions

Step 1: Preheat the Oven

I preheat my oven to 350°F and lightly grease a 9×13 baking dish or line it with parchment paper.

Step 2: Mix the Fruit Filling

In a bowl I combine chopped strawberries chopped rhubarb sugar cornstarch and lemon juice. I let it sit while I prepare the crust so the flavors can meld.

Step 3: Make the Crumb Mixture

In a large bowl I mix flour oats brown sugar cinnamon baking powder and salt. I add cold cubed butter and use a pastry cutter until it resembles coarse crumbs.

Step 4: Assemble the Bars

I press about two-thirds of the crumb mixture into the bottom of the prepared pan to form the crust then I spread the fruit filling evenly over the crust.

Step 5: Top and Bake

I sprinkle the remaining crumb mixture over the top of the fruit layer and bake for 40 to 45 minutes until the top is golden and the filling is bubbly.

Step 6: Cool and Cut

I let the bars cool completely in the pan before slicing them into squares so they hold their shape.

Tips

If your strawberries are very juicy I suggest adding an extra teaspoon of cornstarch to keep the filling from getting too runny. I also like to chill the bars for an hour after baking which makes cutting them neater and enhances the flavor.

Ways to Serve

I love serving these bars chilled straight from the fridge or slightly warmed with a scoop of vanilla ice cream. They’re also great for picnics brunch tables or even wrapped up as a sweet homemade gift.

Frequently Asked Questions

Can I make this strawberry rhubarb crumb bars recipe with frozen fruit?

Yes just thaw the fruit and drain excess liquid to avoid a soggy filling.

How should I store strawberry rhubarb crumb bars?

Keep them in an airtight container in the fridge for up to 5 days or freeze them for longer storage.

Can I reduce the sugar in this strawberry rhubarb crumb bars recipe?

Absolutely but keep in mind that rhubarb is quite tart so taste and adjust to your preference.

See You in the Kitchen

I hope you try this strawberry rhubarb crumb bars recipe soon! It’s one of those treats that feels both nostalgic and new every time I make it. Let me know how yours turn out and don’t forget to share a photo or save this recipe for your next baking day!

Happy Cooking!

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