My Strawberry Rhubarb Crumb Bars are buttery, bright, and packed with jammy spring flavor. Sweet strawberries and tart rhubarb cook down into a soft fruit filling layered between a vanilla shortbread crust and golden crumble topping.
If you love baking with this classic spring fruit combo, you might also love my easy strawberry rhubarb galette. If buttery fruit bars are more your style, my blueberry crumb bars with fresh berries are another favorite.
Quick Look: Strawberry Rhubarb Crumb Bars
⏱️ Ready In: About 1 hour 10 minutes + cooling
🔥 Bake Time: 42–50 minutes total
🍽️ Serves: 9 bars
✨ Calories: Approximately 385 per bar
🥄 Main Ingredients: Strawberries, rhubarb, orange zest, buttery vanilla crumble
🌿 Dietary Info: Vegetarian
💛 Why You’ll Love It: Jammy tart-sweet fruit tucked between buttery vanilla shortbread layers with crisp golden crumbles on top.
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Why you'll love this recipe
- Sweet + tangy: Strawberries and rhubarb are classic together for a reason. The strawberries bring sweetness while the rhubarb adds that bright, tart flavor that keeps every bite balanced. If you love sweet and tang flavors, then you will love my sourdough lemon pound cake and my lemon curd muffins!
- Buttery crumb layers: The crust and topping come from one easy dough, which keeps prep simple and gives you rich vanilla shortbread flavor in every layer.
- Fresh spring flavor: Orange zest adds a subtle citrus note that wakes everything up without overpowering the fruit, similar to how a hint of lemon enhances the flavor of my sourdough discard blueberry muffins.
- Great for gatherings: These slice beautifully once cooled and travel well for brunches, baby showers, spring parties, or weekend baking.
- Easy to prep ahead: The bars hold well in the fridge and taste even better the next day.
Jump to:
- Quick Look: Strawberry Rhubarb Crumb Bars
- Why you'll love this recipe
- Ingredients You'll Need
- Easy Substitutions & Variations
- How to Make Strawberry Rhubarb Crumb Bars
- Expert Tips
- What Makes This Recipe Special?
- Strawberry Rhubarb Crumb Bars FAQs
- Strawberry Rhubarb Crumb Bars Troubleshooting Guide
- Storage
- Other Crumb Bar Recipes to Consider
- Strawberry Rhubarb Crumb Bars
Ingredients You'll Need
- fresh strawberries: Fresh strawberries cook down into a jammy filling. They also work beautifully in my strawberry crunch cupcakes.
- fresh rhubarb: Adds bright tart flavor and beautiful color contrast.
- orange zest: The orange zest brightens the filling in the same way citrus lifts my fresh lemon crumb bars.
- cornstarch: Thickens the fruit filling so it sets into sliceable bars.
- fresh orange juice: Mixes with the cornstarch and adds another little burst of citrus.
See recipe card for quantities.
Easy Substitutions & Variations
- Orange: Lemon zest and juice work beautifully if that’s what you have.
- Fruit: Frozen strawberries or rhubarb can work—thaw first and drain off extra liquid.
- Different fruit: You can use the same crumb bar idea with other fruit fillings, like my easy peach crumb bars
- Vanilla: Add ¼ teaspoon almond extract for a bakery-style flavor twist.
- Texture: Sprinkle coarse sugar over the crumble before baking for extra crunch.
- Berries: Add raspberries with the strawberries for a brighter berry flavor.
How to Make Strawberry Rhubarb Crumb Bars
Note: I bake by weight for accuracy. Cup measurements are approximate and may vary depending on how you scoop.
Step 1: Cook the filling: Add strawberries, rhubarb, sugar, and orange zest to a saucepan over medium heat. Cook until the fruit softens and releases juices. Stir together the cornstarch and orange juice, then add it to the pan and cook until thickened and glossy.
Step 2: Make the crumble dough: Stir melted butter, sugar, vanilla, and salt together. Add flour and mix until soft and crumbly.
Step 3: Build the bars: Press about two-thirds of the dough into the parchment-lined pan. Bake until lightly set. Spread the fruit filling over the crust, then crumble the remaining dough evenly over the top.
Step 4: Bake and cool: Bake until golden and bubbling around the edges. Cool completely before slicing so the filling sets cleanly.
Weigh your ingredients! Using a kitchen scale ensures your measurements are accurate, which is key for getting consistent results in baking. It takes the guesswork out of measuring and helps your recipes turn out exactly as intended every time.
Expert Tips
- Taste the rhubarb: Rhubarb can vary a lot in tartness. Taste the filling before thickening and adjust the sugar if needed.
- Don’t skip par-baking: A quick bake on the crust keeps it sturdy and prevents soggy bars.
- Leave the crumble chunky: Bigger uneven crumbles bake up prettier and give more texture. I use a very similar crumble to this recipe in my banana blackberry muffins and my sourdough discard banana bread muffins!
- Cool completely: The bars continue setting as they cool. Refrigerating for 30 minutes before slicing gives especially clean cuts.
- Use parchment overhang: Makes lifting the bars out much easier.
What Makes This Recipe Special?
These bars feel like classic strawberry rhubarb pie, but easier and more casual. You get buttery shortbread, glossy fruit filling, and crisp crumbles in every bite without rolling pie dough.
The orange zest makes the fruit taste especially fresh and springy. Alternatively, you could use lemon juice, which I use in my strawberry rhubarb galette.
Strawberry Rhubarb Crumb Bars FAQs
Yes, you'll just need to cook them a little bit longer to cook away the extra liquid to give you the right texture. I use similar fruit ratios in my blueberry crumb bars with fresh berries, and frozen fruit works there too with a little extra thickener.
Not immediately. They’re fine at room temperature for a day or two, then refrigerate.
Usually, they just need more cooling time. They firm up significantly as they cool.
Strawberry Rhubarb Crumb Bars Troubleshooting Guide
| Problem | Cause | Fix |
|---|---|---|
| Filling too runny | Cut too soon | Cool fully before slicing |
| Bottom crust soft | Skipped par-bake | Bake crust first |
| Filling too tart | Rhubarb especially tart | Add a bit more sugar |
| Crumble browning too fast | Oven runs hot | Tent loosely with foil |
Storage
- Store in an airtight container at room temperature for up to 2 days.
- Refrigerate for up to 5 days.
- For longer storage, freeze bars individually wrapped for up to 2 months. Thaw overnight in the fridge.
Other Crumb Bar Recipes to Consider
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Strawberry Rhubarb Crumb Bars
Equipment
- Kitchen Scale
- Mixing bowls
- small saucepan
- Parchment Paper
- 8x8 pan
Ingredients
For the crust + crumble
- 240 g all-purpose flour 2 cups
- 200 g granulated sugar 1 cup
- 170 g unsalted butter melted (¾ cup)
- ½ teaspoon salt
- 1 teaspoon vanilla extract
For the filling
- 300 g fresh strawberries chopped (about 2 cups)
- 200 g fresh rhubarb sliced (about 2 cups)
- 100 g granulated sugar ½ cup
- 1 teaspoon orange zest
- 2 tablespoons cornstarch
- 1 tablespoon fresh orange juice
Instructions
- Prep the pan: Preheat oven to 350°F. Line an 8x8-inch pan with parchment paper.
- Cook the filling: Add strawberries, rhubarb, sugar, and orange zest to a saucepan over medium heat. Cook 8–10 minutes until softened. Stir together cornstarch and orange juice until smooth, then add to the fruit and cook 2–3 minutes until glossy and thickened. Set aside.300 g fresh strawberries, 200 g fresh rhubarb, 100 g granulated sugar, 1 teaspoon orange zest, 2 tablespoons cornstarch, 1 tablespoon fresh orange juice
- Make the crumble: Mix flour, sugar, and salt. Stir in the combined butter and vanilla until the mixture becomes crumbly.240 g all-purpose flour, 200 g granulated sugar, 170 g unsalted butter, ½ teaspoon salt, 1 teaspoon vanilla extract
- Bake the crust: Press about two-thirds of the dough firmly into the pan. Bake 12–15 minutes until lightly golden.
- Assemble: Spread filling over crust. Crumble remaining dough evenly over top.
- Bake: Bake 30–35 minutes until golden and bubbling.
- Cool: Let cool completely before slicing. Refrigerate briefly for the cleanest cuts if desired.
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