Rhubarb shortbread bars are a delightful twist on classic dessert recipes that bring a perfect balance of tart and sweet in every bite. If you’re looking for a dessert that feels both comforting and fresh, this recipe is a must-try for your spring or summer baking adventures. The buttery shortbread crust pairs wonderfully with the tangy rhubarb filling, all topped with a crumbly streusel that adds texture and flavor.
You’ll find this rhubarb shortbread bars recipe easy to follow, and it’s a great way to use up that seasonal rhubarb you might have on hand. Plus, it makes a fantastic treat for gatherings or as a sweet snack with your afternoon tea or coffee.
Why You'll Love This Recipe
- Combines buttery shortbread with tart, juicy rhubarb for a balanced flavor.
- Crumbly streusel topping adds a delightful texture contrast.
- Simple ingredients you likely have in your pantry.
- Perfect for spring and summer when rhubarb is in season.
- Easy to cut into bars for sharing and serving.
Ingredients
Gather these ingredients to create your rhubarb shortbread streusel bars. The recipe is divided into crust, filling, and streusel components.
For the Shortbread Crust
- 1 1/2 cups all-purpose flour
- 1/2 cup powdered sugar
- 1/4 teaspoon salt
- 3/4 cup unsalted butter, cold and cubed
For the Rhubarb Filling
- 3 cups chopped fresh rhubarb (about 1/2-inch pieces)
- 3/4 cup granulated sugar
- 1 tablespoon cornstarch
- 1 teaspoon vanilla extract
For the Streusel Topping
- 1 cup all-purpose flour
- 1/2 cup packed light brown sugar
- 1/4 teaspoon ground cinnamon
- 1/4 teaspoon salt
- 1/2 cup unsalted butter, melted
Recipe Details
- Prep Time: 25 minutes
- Cook Time: 40 minutes
- Total Time: 1 hour 5 minutes
- Servings: 12 bars
- Calories: Approximately 280 per serving
How to Make Rhubarb Shortbread Streusel Bars: A Delightful Twist on Classic Dessert Recipes
- Preheat your oven to 350°F and line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy removal.
- In a large bowl, combine 1 1/2 cups flour, powdered sugar, and salt for the crust. Cut in the cold cubed butter using a pastry cutter or your fingers until the mixture resembles coarse crumbs. Press evenly into the bottom of the prepared pan to form the crust.
- Bake the crust for 15 minutes until it starts to turn golden. Meanwhile, prepare the rhubarb filling by tossing chopped rhubarb with granulated sugar, cornstarch, and vanilla extract until well coated.
- Remove the crust from the oven and spread the rhubarb filling evenly over it. Set aside.
- For the streusel topping, whisk together flour, brown sugar, cinnamon, and salt in a bowl. Pour in the melted butter and mix until crumbly clumps form. Sprinkle the streusel evenly over the rhubarb layer.
- Bake the assembled bars for an additional 25-30 minutes until the streusel is golden brown and the filling is bubbly. Let cool completely in the pan on a wire rack.
- Once cooled, use the parchment paper overhang to lift the bars out. Cut into 12 squares and serve. These bars are delicious at room temperature or chilled.
Tips for the Best Results
- Use fresh rhubarb for the best tart flavor; frozen rhubarb can be watery and affect texture.
- Keep the butter cold when making the crust to achieve a tender, flaky base.
- If you prefer a sweeter filling, increase sugar in the rhubarb mixture by 2 tablespoons.
- Allow bars to cool fully before cutting to prevent the filling from oozing out.
- Line the pan with parchment paper for easy removal and clean edges.
Storage and Reheating
Store rhubarb shortbread bars in an airtight container in the refrigerator for up to 5 days. They taste great chilled or at room temperature.
To reheat, warm individual bars in the microwave for 15-20 seconds or in a preheated 325°F oven for about 5-7 minutes to regain some softness and warmth.
Frequently Asked Questions
Can I use frozen rhubarb for this recipe?
While fresh rhubarb is recommended for the best texture and flavor, you can use frozen rhubarb if needed. Be sure to thaw and drain any excess liquid before mixing it with the sugar and cornstarch to prevent sogginess.
What can I substitute for cornstarch in the filling?
If you don’t have cornstarch, you can use an equal amount of tapioca starch or arrowroot powder. These alternatives also help thicken the filling and keep it from being too runny.
Can I make these bars ahead of time?
Yes! These bars actually taste better after a few hours or overnight when the flavors meld. Just store them covered in the fridge and bring to room temperature before serving.
How do I make the bars less crumbly?
Ensure the butter is well incorporated in the crust and streusel and press the crust firmly into the pan. Avoid overbaking to keep the bars tender rather than dry and crumbly.