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Rhubarb Crisp

Golden brown rhubarb crisp with oat crumble and vanilla ice cream.

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This easy rhubarb crisp transforms simple pantry staples and tart rhubarb into a warm, comforting dessert. The soft, tangy fruit filling is perfectly balanced by a sweet, buttery oat topping that bakes up golden and crunchy. It’s simpler than pie but just as satisfying, making it the perfect weeknight treat or casual gathering dessert.

Ingredients

Scale
  • For the Rhubarb Filling:
  • 6 cups fresh rhubarb, chopped into 1-inch pieces (about 1 1/2 lbs)
  • 3/4 cup granulated sugar
  • 3 tablespoons all-purpose flour
  • 1 teaspoon vanilla extract
  • Zest of 1 orange (optional)
  • For the Crisp Topping:
  • 1 cup old-fashioned rolled oats
  • 3/4 cup all-purpose flour
  • 3/4 cup packed light brown sugar
  • 1/2 teaspoon ground cinnamon
  • 1/4 teaspoon salt
  • 1/2 cup (1 stick) cold unsalted butter, cubed

Instructions

  1. Preheat oven to 375°F (190°C).
  2. Make the filling: In a large bowl, toss chopped rhubarb with granulated sugar, 3 tbsp flour, vanilla, and orange zest (if using) until evenly coated. Pour into a 9-inch pie dish or 2-quart baking dish.
  3. Make the topping: In a medium bowl, whisk together oats, 3/4 cup flour, brown sugar, cinnamon, and salt. Add cold, cubed butter. Use a pastry cutter, fork, or your fingers to work the butter into the dry ingredients until the mixture resembles coarse crumbs with some pea-sized butter bits.
  4. Assemble: Sprinkle the oat topping evenly over the rhubarb filling. Do not press down.
  5. Bake: Place the dish on a baking sheet to catch drips. Bake for 40-50 minutes, until the filling is bubbling vigorously and the topping is deep golden brown.
  6. Rest: Let the crisp cool on a wire rack for at least 20-30 minutes before serving to allow the filling to set.

Notes

For frozen rhubarb, use without thawing; bake time may increase by 5-10 minutes. Ensure butter for topping is cold for a crumbly texture. Letting the crisp rest is crucial for a set, non-runny filling. Store covered at room temp for 1-2 days, in the fridge for up to 5 days, or freeze for up to 3 months.

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