Strawberry Rhubarb Crumble Bars

Name: Strawberry Rhubarb Crumble Bars
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Yield: 12 bars
Ingredients: 1 cup all-purpose flour; 1/2 cup rolled oats; 1/2 cup brown sugar; 1/2 cup unsalted butter, melted; 1/2 teaspoon salt; 1/2 teaspoon cinnamon; 2 cups strawberries, hulled and chopped; 1 cup rhubarb, chopped; 1/2 cup granulated sugar; 2 tablespoons cornstarch; 1 tablespoon lemon juice; 1/2 teaspoon vanilla extract

Highlighted under: Cold Sweets

I absolutely love making Strawberry Rhubarb Crumble Bars, especially during the summer months when rhubarb is in season. The tartness of the rhubarb combined with the sweetness of the strawberries creates an irresistible filling that complements the buttery crumbly topping. These bars are not only delightful for dessert but also serve as a wonderful treat for picnics or family gatherings. I can’t resist going back for seconds whenever I make them, and I'm sure you’ll find them just as addictive!

Created by

The Cheftylerskitchen Team

Last updated on 2026-03-21T16:12:54.218Z

When I first stumbled upon the combination of strawberries and rhubarb, I knew I had to give it a try in a dessert. After several attempts to balance the tartness and sweetness, I finally perfected this crumble bar recipe. The crispy topping contrasts beautifully with the gooey fruit layer, making each bite a delightful experience.

One tip I learned is to let the filling cool slightly before spreading it on the crust. This helps the layers set better and prevents the crumble from getting soggy. Trust me, it's worth the wait for that perfect texture!

Why You'll Love These Bars

A harmonious blend of sweet strawberries and tangy rhubarb
Buttery crumble topping that adds a lovely crunch
Perfect for summer gatherings or as a cozy treat at home

Understanding the Fruit Filling

The fruit filling in these Strawberry Rhubarb Crumble Bars is what truly sets them apart. Using fresh, ripe strawberries and tart rhubarb creates a beautifully balanced filling. Strawberries add natural sweetness, while rhubarb provides a refreshing tang. For best results, ensure that the rhubarb is tender yet firm; overcooked rhubarb can lose its shape, turning into mush. If rhubarb is unavailable, you can substitute it with tart apples or even cherries for a different but delightful flavor profile.

When preparing the filling, it’s crucial to mix the cornstarch thoroughly with the fruit and sugar to ensure an even distribution. This helps thicken the filling during baking, preventing a soggy bottom. If you prefer a thicker filling, increase the cornstarch to three tablespoons. Remember, if your strawberries are particularly juicy, you might need a bit more cornstarch to absorb the extra liquid and achieve the desired consistency.

Mastering the Crumble Topping

The crumble topping is a key element in these bars, adding a delightful crunch and buttery flavor. Make sure to mix the flour and oats with brown sugar gently to avoid overworking the dough. A crumbly texture is ideal; when pressing it into the pan, don’t worry about it being perfectly flat. A bit of unevenness can create lovely variations in texture. If you're looking for added flavor, consider adding chopped nuts or shredded coconut to the topping for extra crunch and depth.

While the crumble topping needs to be baked until golden brown, keep an eye on it towards the end of the baking time. Ovens can vary, and you may find that your bars require less time than indicated. Look for a light golden color on top, and you’ll know they’re ready. If the edges start to darken too much before the center is set, you can cover the pan loosely with aluminum foil to prevent over-browning while allowing the center to continue baking.

Ingredients

For the Crust and Topping

1 cup all-purpose flour
1/2 cup rolled oats
1/2 cup brown sugar
1/2 cup unsalted butter, melted
1/2 teaspoon salt
1/2 teaspoon cinnamon

For the Filling

2 cups strawberries, hulled and chopped
1 cup rhubarb, chopped
1/2 cup granulated sugar
2 tablespoons cornstarch
1 tablespoon lemon juice
1/2 teaspoon vanilla extract

Mix these ingredients thoroughly to ensure even distribution of flavors.

Instructions

Preheat the Oven

Preheat your oven to 350°F (175°C) and grease a 9x9 inch baking pan.

Prepare the Filling

In a bowl, combine strawberries, rhubarb, sugar, cornstarch, lemon juice, and vanilla. Stir until well mixed and set aside.

Make the Crust

In another bowl, mix flour, oats, brown sugar, melted butter, salt, and cinnamon until crumbly. Press half of this mixture into the bottom of the prepared pan.

Add Filling

Spread the fruit filling evenly over the crust layer.

Top with Remaining Crumble

Sprinkle the rest of the crumble mixture on top of the filling.

Bake

Bake for 30-40 minutes, or until the top is golden brown. Allow to cool before cutting into bars.

Serve chilled or at room temperature for the best flavor.

Pro Tips

For a deeper flavor, consider adding a pinch of nutmeg to the crumble mixture. You can also replace the strawberries with raspberries for a different twist!

Storage and Make-Ahead Tips

These Strawberry Rhubarb Crumble Bars are excellent for making ahead of time. Once cooled, cut them into bars and store them in an airtight container in the refrigerator. They will stay fresh for about five days, perfect for snacking throughout the week. If you want to extend their shelf life, consider freezing the bars. Wrap each piece tightly in plastic wrap and then place them in a freezer-safe bag. They can be stored in the freezer for up to three months.

To reheat the bars, simply take them out of the fridge or freezer and warm them in the oven at 300°F (150°C) for about 10-15 minutes. This will refresh their texture and flavor. If you’re short on time, a quick zap in the microwave works, too—just be cautious not to overheat them, as that can make the filling overly gooey.

Serving Suggestions

These crumble bars shine on their own, but adding a scoop of vanilla ice cream or a dollop of whipped cream transforms them into an indulgent treat. The creamy elements contrast beautifully with the tartness of the filling. If you're hosting a summer gathering, serving these bars with fresh mint leaves or a sprinkle of powdered sugar adds an elegant touch.

For a fun twist, you can customize these bars by adding different fruits based on seasonal availability. Try mixing in some blueberries or raspberries alongside the strawberries and rhubarb for a berry medley. Each fruit brings its unique flavor to the dish, creating a vibrant, colorful dessert that will impress your guests.

Questions About Recipes

→ Can I use frozen rhubarb and strawberries?

Yes, you can use frozen fruit, but make sure to thaw and drain excess liquid to avoid a soggy filling.

→ How should I store these bars?

Store in an airtight container in the refrigerator for up to 5 days.

→ Can I make these gluten-free?

Absolutely! Use gluten-free flour and oats in the recipe.

→ Can I add other fruits?

Yes, feel free to mix in blueberries or peaches for a unique flavor combination!