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Old-fashioned Rhubarb Crumble

Old-fashioned rhubarb crumble with tender rhubarb and sweet juices bubbling under a golden butter crumble topping. A classic British dessert built with a thickened fruit filling and crisp, buttery oatless crumbs.
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Prep Time 15 minutes
Cook Time 40 minutes
cooling 15 minutes
Total Time 1 hour 10 minutes
Servings: 6 servings
Course: Dessert
Cuisine: British
Calories: 460
Ingredients Equipment Method Notes

Ingredients
  

Rhubarb filling
  • 6 cup fresh rhubarb Cut into 1-inch pieces.
  • 1 cup sugar
  • 2 tbsp cornstarch
  • 1 tsp vanilla extract
Crumble topping
  • 1.5 cup all-purpose flour
  • 0.75 cup brown sugar
  • 0.5 cup butter Cold and cubed.
  • 0.25 tsp salt

Equipment

  • 1 sheet pan

Method
 

Prep
  1. Preheat oven to 375°F and butter a 2-quart baking dish, keeping the dish ready for the filling and topping.
  2. Toss the fresh rhubarb with sugar, cornstarch, and vanilla extract until the pieces look evenly coated, then spread into the prepared baking dish.
Make crumble
  1. Combine all-purpose flour, brown sugar, and salt, then cut in the cold butter until the mixture resembles coarse breadcrumbs and holds small clumps.
  2. Sprinkle the crumble evenly over the rhubarb so the top looks shaggy and fully covered.
Bake and cool
  1. Bake at 375°F for 35-40 minutes until the topping is golden and the filling is visibly bubbling at the edges.
  2. Let cool for 15 minutes so the fruit juices thicken slightly before serving.
  3. Serve warm with vanilla custard or ice cream for each portion.

Notes

For the cleanest texture, make sure the butter stays cold while rubbing/cutting it into the dry ingredients; if your kitchen is warm, chill the crumble mixture for 10 minutes before topping. Store leftovers covered in the fridge up to 3 days and reheat in a 325°F oven until warmed through. Freezing is not recommended because the rhubarb can become watery after thawing. For a lower-sugar option, replace sugar with an equal-measure sugar substitute designed for baking (taste will be slightly different).