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Old-fashioned Rhubarb Crumble

Old-fashioned rhubarb crumble with tender rhubarb and a golden butter crumble topping. Bake until the fruit juices bubble and the topping turns crisp and lightly browned, then cool briefly for a spoonable texture.
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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: 410
Ingredients Equipment Method Notes

Ingredients
  

For filling
  • 6 cup fresh rhubarb cut into 1-inch pieces
  • 1 cup sugar
  • 2 tbsp cornstarch
  • 1 tsp vanilla extract
For crumble
  • 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 and fill
  1. Preheat oven to 375°F and butter a 2-quart baking dish. Use a dish that can hold the rhubarb in an even layer.
  2. Toss fresh rhubarb with sugar, cornstarch, and vanilla extract, then spread it in the prepared dish. The fruit should look evenly coated and slightly sticky.
Make crumble topping
  1. Combine all-purpose flour, brown sugar, and salt in a bowl. Mix until the dry ingredients are uniform in color.
  2. Cut in cold butter until the mixture resembles coarse breadcrumbs. Pinch a bit between your fingers—small clumps should form without melting.
  3. Sprinkle the crumble evenly over the rhubarb. Aim for an even layer so the top bakes golden throughout.
Bake and cool
  1. Bake at 375°F for 35-40 minutes until the topping is golden and the filling is bubbling. You should see active bubbling around the edges when it’s ready.
  2. Let the crumble cool for 15 minutes before serving. The topping will set slightly, making it easier to scoop.

Notes

Pro tip: keep the butter cold and handle the crumble as little as possible—cold fat creates a crisp, sandy topping instead of a paste. Refrigerate leftovers in an airtight container up to 3 days; reheat in a 325°F oven until warmed through. Freezing is not recommended for best texture. For a different dietary option, use a 1:1 gluten-free all-purpose flour blend to make a gluten-free crumble topping.