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Strawberry Rhubarb Crumble with Buttery Oat Topping

Close-up of a warm serving of Strawberry Rhubarb Crumble with a golden, crunchy topping over bright red fruit filling.
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Make this classic rhubarb recipe featuring a perfect balance of sweet strawberries and tart rhubarb, topped with a crisp, buttery oat crumble. This dessert manages fruit moisture for a perfect bake.

Ingredients

Scale
  • 3 cups fresh rhubarb, cut into 1-inch pieces
  • 3 cups fresh strawberries, hulled and halved
  • 3/4 cup granulated sugar (adjust based on fruit tartness)
  • 1/4 cup cornstarch (for thickening)
  • 1 tablespoon lemon juice
  • 1 cup all-purpose flour
  • 1 cup rolled oats
  • 1/2 cup packed light brown sugar
  • 1/2 teaspoon ground cinnamon
  • 1/2 cup (1 stick) cold unsalted butter, cut into small cubes

Instructions

  1. Preheat your oven to 375°F (190°C). Lightly grease an 8×8 inch baking dish.
  2. In a large bowl, combine the cut rhubarb and strawberries. Add the granulated sugar, cornstarch, and lemon juice. Toss gently until the fruit is evenly coated. This step helps manage the fruit moisture.
  3. Pour the fruit mixture into the prepared baking dish, spreading it into an even layer.
  4. In a separate medium bowl, prepare the crumble topping. Combine the flour, rolled oats, brown sugar, and cinnamon.
  5. Cut in the cold butter using your fingertips or a pastry blender until the mixture resembles coarse crumbs with some pea-sized pieces remaining.
  6. Sprinkle the oat topping evenly over the fruit filling in the baking dish. Do not press down.
  7. Bake for 45 to 55 minutes, or until the topping is golden brown and the fruit filling is bubbling thickly around the edges.
  8. Let the strawberry dessert ideas cool on a wire rack for at least 20 minutes before serving. This allows the filling to set properly.

Notes

  • To achieve the best texture and avoid a watery bottom, ensure the cornstarch is fully mixed with the sugar before adding it to the fruit.
  • If your rhubarb is particularly tart, you can increase the granulated sugar by up to 1/4 cup.
  • For an extra golden topping, you can add 1 tablespoon of cold water to the crumble mixture before sprinkling it over the fruit.

Nutrition

Find it online: https://onedishuniverse.com/strawberry-rhubarb-crumble/