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Easy Strawberry Rhubarb Crisp Bars Recipe with Perfect Oat Crumble

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These bars combine the tartness of rhubarb and sweetness of strawberries with a buttery oat crumble topping for a quick, comforting dessert that’s easy to make and perfect for spring and summer.

Ingredients

Scale
  • 2 cups fresh rhubarb, chopped into ½-inch pieces
  • 2 cups fresh strawberries, hulled and quartered
  • ¾ cup granulated sugar
  • 1 tablespoon fresh lemon juice
  • 1 tablespoon cornstarch
  • 1 ½ cups rolled oats
  • 1 cup all-purpose flour (or almond flour for gluten-free)
  • ¾ cup packed brown sugar
  • ½ cup (1 stick) unsalted butter, softened
  • 1 teaspoon ground cinnamon
  • ¼ teaspoon salt

Instructions

  1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan lightly with butter or non-stick spray.
  2. In a medium bowl, combine chopped rhubarb and quartered strawberries. Sprinkle granulated sugar, cornstarch, and lemon juice over the fruit. Gently toss to coat evenly. Let sit for about 10 minutes to release juices.
  3. In a large bowl, mix rolled oats, all-purpose flour, brown sugar, cinnamon, and salt. Add softened butter in small chunks and blend with a pastry cutter, fork, or fingers until mixture resembles coarse crumbs with some pea-sized pieces.
  4. Press about two-thirds of the oat crumble firmly into the bottom of the prepared baking pan to form the base.
  5. Spread the fruit filling evenly over the crumble base, including any juice.
  6. Sprinkle the remaining oat crumble evenly over the fruit filling without pressing down.
  7. Bake for 40–45 minutes until the topping is golden brown and the filling is bubbling. Tent with foil if topping browns too quickly.
  8. Cool completely in the pan on a wire rack for about an hour to let the filling set.
  9. Cut into squares using a sharp knife warmed under hot water and dried for clean edges.

Notes

Use softened (not melted) butter for the crumble to achieve the perfect texture. Let bars cool completely before cutting to prevent crumbling. For a crispier bottom, bake the base crumble alone for 10 minutes before adding filling and topping. Frozen fruit can be used if thawed and drained well. For dairy-free, substitute butter with coconut oil or vegan margarine. Adding nuts like walnuts or pecans to the crumble adds crunch and flavor.

Nutrition

Keywords: strawberry rhubarb bars, oat crumble bars, easy fruit bars, spring dessert, summer dessert, quick dessert, rhubarb recipe, strawberry recipe, oat crumble

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