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A tray of golden brown strawberry rhubarb bars with a crumbly oat topping and bright red fruit filling.

Strawberry Rhubarb Bars

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Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings 16 servings
Calories 285 kcal

Ingredients
  

  • 1.5 cups all -purpose flour
  • 1.5 cups rolled oats
  • 1 cup light brown sugar, packed
  • 1 teaspoon baking powder
  • 0.5 teaspoon fine sea salt
  • 1 cup unsalted butter, chilled and cubed
  • 3 cups fresh rhubarb, chopped into 0.5-inch pieces
  • 2 cups fresh strawberries, hulled and sliced
  • 0.75 cup granulated sugar
  • 2 tablespoons cornstarc h
  • 1 tablespoon lemon juice
  • 1 teaspoon vanilla extract

Instructions
 

  • Preheat the oven to 350°F (175°C) and line a 9x13 inch baking pan with parchment paper.
  • In a large mixing bowl, whisk together the flour, oats, brown sugar, baking powder, and salt.
  • Incorporate the chilled butter cubes into the dry mixture using a pastry blender or fork until the texture resembles coarse crumbs.
  • Press exactly half of the crumble mixture firmly into the bottom of the prepared baking pan to create an even base layer.
  • In a medium bowl, toss the rhubarb and strawberries with granulated sugar, cornstarch, lemon juice, and vanilla extract until the fruit is thoroughly coated.
  • Distribute the fruit filling evenly over the crust layer.
  • Sprinkle the remaining half of the crumble mixture over the top of the fruit, pressing lightly to adhere.
  • Bake for 45 to 50 minutes, or until the topping is golden brown and the fruit juices are bubbling at the edges.
  • Remove from the oven and allow the bars to cool completely in the pan for at least 2 hours to ensure the filling sets before slicing into squares.