Strawberry Rhubarb Crumb Bars
These delightful Strawberry Rhubarb Crumb Bars offer the perfect balance of sweet and tart, encased in a buttery, crumbly crust and topping. They are an ideal treat for spring and summer gatherings, or a comforting dessert any time of year. Each bite delivers a burst of juicy fruit surrounded by a tender oat-infused streusel.
Prep Time
25 minutes
Cook Time
45 minutes
Total Time
1 hour 10 minutes (plus 2 hours cooling)
Servings
Makes 12-16 bars
Keywords
Why This Recipe Delivers
- A perfect harmony of sweet strawberries and tart rhubarb.
- Features a buttery, golden crumb topping and a tender crust.
- Ideal for seasonal celebrations or a comforting homemade treat.
- Relatively simple to prepare, making it a rewarding baking project.
- Deliciously satisfying with every bite, offering delightful texture contrast.
Ingredients
- 300 grams (2 cups) fresh strawberries, hulled and chopped
- 300 grams (2 cups) fresh rhubarb, trimmed and chopped
- 150 grams (3/4 cup) granulated sugar
- 30 milliliters (2 tablespoons) cornstarch
- 15 milliliters (1 tablespoon) fresh lemon juice
- 300 grams (2 1/2 cups) all-purpose flour
- 90 grams (1 cup) rolled oats
- 200 grams (1 cup) packed light brown sugar
- 5 milliliters (1 teaspoon) ground cinnamon
- 5 grams (1 teaspoon) baking powder
- 1.25 grams (1/4 teaspoon) fine sea salt
- 226 grams (1 cup) unsalted butter, very cold and cut into 1.5 cm (1/2 inch) cubes
Instructions
- Begin by preheating your oven to 175°C (350°F). Line a 23×33 cm (9×13 inch) baking pan with parchment paper, leaving an overhang on the longer sides. Lightly grease any exposed pan or paper to prevent sticking and ensure easy removal of the bars later.
- In a medium-sized bowl, gently combine the chopped strawberries and rhubarb. Add the granulated sugar, cornstarch, and fresh lemon juice, stirring until the fruit is evenly coated. Set this fruit mixture aside to allow the flavors to meld and juices to release while you prepare the crumb topping.
- In a large separate bowl, whisk together the dry ingredients for the crumb mixture: all-purpose flour, rolled oats, packed light brown sugar, ground cinnamon, baking powder, and fine sea salt. Ensure all ingredients are thoroughly combined.
- Add the very cold, cubed unsalted butter to the dry ingredients. Using a pastry blender, two knives, or your fingertips, cut the butter into the flour mixture until it resembles coarse, wet sand or small pea-sized crumbs. The key is to work quickly to prevent the butter from melting too much. For an even quicker method, you can pulse the ingredients in a food processor until crumbly.
- Press two-thirds of the prepared crumb mixture evenly into the bottom of the lined baking pan. Use the back of a spoon or your clean hands to firmly compact the mixture, creating a solid base for the bars. This forms the crust that will hold the juicy fruit filling.
- Carefully spread the strawberry and rhubarb fruit filling evenly over the pressed crust. Try to distribute the fruit as uniformly as possible to ensure every bite of the bar has a good fruit-to-crumb ratio.
- Sprinkle the remaining one-third of the crumb mixture evenly over the fruit filling. This will form the delicious, buttery streusel topping.
- Place the baking pan into the preheated oven and bake for 40 to 45 minutes. The bars are ready when the topping is golden brown and the fruit filling is bubbly around the edges.
- Once baked, remove the pan from the oven and place it on a wire rack to cool completely. This is a crucial step; allow the bars to cool for at least 2 hours, or even longer, before attempting to slice them. Cooling allows the fruit filling to set properly and prevents the bars from falling apart.
- Once fully cooled, use the parchment paper overhang to lift the entire slab of bars out of the pan. Place on a cutting board and slice into individual bars of your desired size.
Tools You’ll Need
- 9×13 inch (23×33 cm) baking pan
- Parchment paper
- Large mixing bowls (2)
- Pastry blender, two forks, or food processor
- Measuring cups and spoons
- Spatula or spoon for spreading
- Wire cooling rack
Essential Success Tips
- Use very cold butter for the crumb mixture. This helps create pockets of steam during baking, resulting in a flakier, more tender crumb.
- Do not overmix the crumb topping once the butter is added; mix just until coarse crumbs form to avoid tough bars.
- Ensure the fruit mixture is evenly spread to prevent some areas from being too wet or dry.
- Allow the bars to cool completely before cutting. This is essential for the filling to set and prevents the bars from crumbling apart when sliced.
- For the best flavor, use fresh, in-season strawberries and rhubarb.
Professional Cooking Secrets
- For an extra layer of flavor, lightly toast the rolled oats before incorporating them into the crumb mixture. This adds a nutty depth that complements the fruit beautifully.
- A pinch of cardamom in the fruit filling or a tiny grating of fresh nutmeg in the crumb topping can elevate the spice profile, adding a subtle warmth.
- To achieve perfect, clean slices, chill the cooled bars in the refrigerator for 30-60 minutes before cutting. Use a large, sharp knife, wiping it clean between each cut.
Notes
- Storage: Store leftover crumb bars in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to 5 days.
- Freezing: These bars freeze beautifully. Once completely cooled and sliced, arrange them in a single layer on a baking sheet and freeze until solid. Transfer to a freezer-safe bag or container and freeze for up to 3 months. Thaw at room temperature or in the refrigerator.
- Variations: Feel free to experiment with other fruit combinations like blueberries and peaches, or apples and cranberries. Adjust sugar content based on fruit sweetness.
Frequently Asked Questions
Can I use frozen fruit for these bars?
Yes, you can use frozen strawberries and rhubarb. Do not thaw them before mixing; simply toss them with the sugar, cornstarch, and lemon juice while still frozen. You might need to add a few extra minutes to the baking time.
My crumb topping isn't very crumbly; what went wrong?
This often happens if the butter was too warm or if the mixture was overworked. Ensure your butter is very cold and handle the mixture quickly to prevent the butter from melting. If it feels too wet, you can chill the mixture briefly before sprinkling.
How do I know when the bars are fully cooked?
The bars are done when the topping is golden brown and the fruit filling is visibly bubbly around the edges. A slight jiggle in the center is acceptable, as it will continue to set as it cools.
Nutrition Facts (Per Serving)
Calories: 380, Protein: 4g, Fat: 20g, Carbs: 48g, Fiber: 2g, Sugar: 30g (per estimated 1/12th serving). Note: This is an estimated nutritional summary; actual values may vary based on ingredients and portion size.
Allergy Information
Contains dairy (butter) and gluten (flour, oats). For a gluten-free version, use a gluten-free all-purpose flour blend and certified gluten-free rolled oats.
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