Easy Strawberry Rhubarb Crumb Bars

There’s a magical time each year when the first stalks of ruby-red rhubarb appear at the market, right alongside plump, sweet strawberries. It’s a sign that warmer days are here, and for me, it’s a signal to fire up the oven. This pairing is a classic for a reason, and these Strawberry Rhubarb Crumb Bars are the perfect way to celebrate it. Imagine a buttery, shortbread-like crust, a layer of sweet and tangy fruit filling, and a generous crumble topping that gets perfectly golden in the oven. They are everything you love about a fruit pie, but in a much easier, shareable bar form. If you love this flavor combination as much as I do, you’ll also adore these Strawberry Rhubarb Cheesecake Bars for a creamier twist!

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Content List

Why make these Strawberry Rhubarb Crumb Bars

These bars are a guaranteed crowd-pleaser and one of my go-to recipes for spring and summer gatherings. Here’s why you’ll fall in love with them:

• The Perfect Texture Trio: You get a sturdy yet tender crust, a luscious and jammy fruit filling, and a delightfully crunchy, buttery crumble on top. Every bite is an adventure in textures.
• Sweet & Tart Harmony: The natural tartness of the rhubarb is perfectly balanced by the sweetness of the strawberries and sugar, creating a flavor that is bright and vibrant, never cloying.
• Feeds a Crowd: This recipe is baked in a 9×13-inch pan and yields 24 bars, making it ideal for potlucks, family picnics, or bake sales.
• Simple Yet Impressive: While they look and taste gourmet, the steps are straightforward. The crust and crumble are made from the same batch of dough, saving you time and effort!

Ingredients

Here’s what you’ll need to make these delicious bars. The combination of a buttery crust and a vibrant fruit filling is simply irresistible.

CRUST/CRUMBLE:

• 1½ cups salted butter, softened
• 1 cup + 1 tbsp powdered sugar
• ¾ cup granulated sugar
• 1½ tsp vanilla
• 3 cups all-purpose flour

FILLING:

• 2 cups fresh rhubarb, cut into ½-inch pieces
• 2 cups fresh strawberries, sliced
• ¾ cup granulated sugar
• 2½ tbsp cornstarch
• ¾ cup water
• 1 tsp vanilla extract

How to make Strawberry Rhubarb Crumb Bars

Follow these simple steps to create the most delicious fruit crumb bars you’ve ever had!

Step 1: Start by getting your oven and pan ready. Preheat the oven to 350°F and generously spray a 9×13 inch baking dish with non-stick cooking spray. Set it aside for later.

Step 2: In a medium-sized mixing bowl, use a hand mixer to cream together the softened butter, powdered sugar, and granulated sugar until the mixture is light and fluffy. Add the vanilla extract and mix it in.

Step 3: Gradually add the flour to your butter mixture, one cup at a time. Mix on low speed until the flour is just incorporated after each addition. Be careful not to overmix; you want a crumbly, sandy texture.

Step 4: Take half of your crumb mixture and press it firmly and evenly into the bottom of your prepared 9×13 pan to form the crust. Bake this crust for 20-22 minutes. You’re looking for the very edges to get a hint of golden brown. Once baked, remove it from the oven and let it cool for at least 20 minutes.

Step 5: While the crust cools, prepare the filling. In a 2-quart saucepan, whisk together the granulated sugar and cornstarch. Add the fresh strawberries, rhubarb, and water. Stir everything together and cook over medium-high heat.

Step 6: Bring the fruit mixture to a boil, stirring it often to prevent sticking. Once it boils, reduce the heat to medium-low and let it simmer for about 5 minutes. Continue stirring until the filling thickens to a gravy-like consistency and the fruit starts to break down. Remove it from the heat and stir in the vanilla extract.

Step 7: Pour the warm, thick filling over your partially cooled crust, spreading it out evenly. Sprinkle the remaining half of the crumb mixture evenly over the top of the filling.

Step 8: Return the pan to the 350°F oven and bake for another 30 minutes. The bars are done when the crumble topping is just starting to turn a light golden brown. Let the bars cool completely in the pan before cutting and serving. This is crucial for clean slices!

How to serve Strawberry Rhubarb Crumb Bars

These bars are fantastic all on their own, served chilled straight from the refrigerator. The contrast between the cool, jammy filling and the buttery crust is delightful. For an extra touch of decadence, serve a bar slightly warmed up with a scoop of creamy vanilla bean ice cream or a generous dollop of fresh whipped cream. The creaminess is a wonderful complement to the tart fruit.

How to store Strawberry Rhubarb Crumb Bars

Because of the fresh fruit filling, these bars need to be refrigerated. Once they have cooled completely, cover the pan with plastic wrap or a lid, or transfer the cut bars to an airtight container. They will stay fresh and delicious in the refrigerator for up to 5 days.

For longer storage, these bars freeze beautifully! Cut them into individual squares and wrap them tightly in plastic wrap, then place them in a freezer-safe bag or container. They can be frozen for up to 3 months. To enjoy, simply thaw a bar in the refrigerator or on the counter for a few hours.

Tips to make Strawberry Rhubarb Crumb Bars

Follow these tips for crumb bar perfection every time!

• Don’t Skip the Cool Down: The hardest part of this recipe is waiting! You must let the crust cool before adding the filling, and you must let the finished bars cool completely before slicing. This ensures a firm, non-soggy crust and perfectly clean, beautiful squares.
• Fresh vs. Frozen: While fresh, in-season fruit is best, this recipe works well with frozen, too. If using frozen rhubarb and strawberries, do not thaw them first. You may need to add a few extra minutes to the simmer time for the filling to thicken up properly.
• Don’t Overmix the Crumble: When adding the flour to the butter and sugar mixture, mix only until it’s just combined. Overmixing can develop the gluten and make your crust and crumble tough instead of tender and crumbly.
• Experiment with Flavors: Love the crumble concept? You can adapt the filling for other seasons! Try this Cranberry Crumble Bars Recipe during the holidays for a festive treat.

FAQs About Strawberry Rhubarb Crumb Bars

Can I use only strawberries or only rhubarb?

Absolutely! If you’re using all strawberries, you might want to reduce the sugar slightly as they are naturally sweeter. If using all rhubarb, you might want to increase the sugar a bit to balance its tartness. You’ll need 4 cups of fruit in total.

Why is my crust soggy?

A soggy crust usually happens for two reasons. First, it’s crucial to pre-bake the bottom crust to create a barrier against the wet filling. Second, ensure you cook the filling on the stovetop until it’s properly thickened. If it’s too thin when you pour it on, the excess moisture will soak into the crust.

Can I make this recipe gluten-free?

Yes, you can substitute the all-purpose flour with a good quality 1-to-1 gluten-free baking flour blend. The texture will be very similar and just as delicious. Make sure your blend contains xanthan gum.

Final Thoughts

Strawberry Rhubarb Crumb Bars are a true taste of the season. They capture the nostalgic flavor of a classic pie but in a simple, portable format that’s perfect for any occasion. The buttery crumble, the sweet-tart filling, and the tender crust come together to create a dessert that is comforting, delicious, and utterly unforgettable. I hope you enjoy baking and sharing these bars as much as I do!

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