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White plate with scoop of strawberry rhubarb crumble and vanilla ice cream.

Strawberry Rhubarb Crumble

Yield: 12 Servings (9X13-inch pan)
Prep Time: 35 minutes
Cook Time: 45 minutes
Total Time: 1 hour 20 minutes

Ingredients

Crumble Topping:

  • 2 ½ cups (355 g) all-purpose flour
  • 1 teaspoon baking powder
  • Pinch of salt
  • ⅓ cup (71 g) granulated sugar
  • ⅓ cup (71 g) brown sugar
  • Zest of 1 lemon, about a teaspoon
  • 14 tablespoons (199 g) butter, melted

Strawberry Rhubarb Filling:

  • 3 cups (340 g) chopped rhubarb, 1/2-inch pieces (about 8-9 or so medium stalks)
  • 2 quarts (907 g) strawberries, hulled and quartered or chopped, about 1/2-inch pieces
  • 1 tablespoon fresh lemon juice
  • 1 cup (212 g) granulated sugar
  • ⅓ cup cornstarch
  • Pinch of salt
  • Vanilla ice cream, for serving

Instructions 

  • Preheat the oven to 375 degrees F.
  • For the topping, in a medium bowl, whisk together the flour, baking powder, salt, granulated sugar, brown sugar, and lemon zest. Add the melted butter and stir until the mixture forms pea-size and slightly larger clumps. Refrigerate while making the filling.
  • For the filling, in a 9X13-inch dish combine the rhubarb, strawberries, lemon juice, sugar, cornstarch, and salt until well mixed. Let the mixture sit for 10-15 minutes (this will help the cornstarch dissolve in the liquid from the fruit which will help it thicken better while baking).
  • Spread the fruit filling evenly in the pan. Remove the topping from the fridge and crumble it in your fingers if it has hardened while chilling. Cover the fruit filling evenly with the topping.
  • Place the 9X13-inch dish on a foil-lined pan (in case the crumble bubbles a bit while baking) and bake for 45-50 minutes until the fruit mixture is bubbling and the topping is golden brown in spots.
  • Let the crumble rest out of the oven for 15 minutes (the filling will thicken as it rests). Serve warm with vanilla ice cream.