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Classic Rhubarb Crisp with Crunchy Oat Topping

A close-up view of a freshly baked rhubarb crisp with a thick, golden, crumbly oat topping over bubbling fruit filling.
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Make this easy rhubarb crisp for a perfect balance of sweet and tart flavor. This recipe focuses on achieving a moist, jammy filling beneath a buttery, crunchy oat topping. It is a simple dessert perfect for spring and summer fruit.

Ingredients

Scale
  • 4 cups fresh rhubarb, chopped into 1-inch pieces
  • 1 cup granulated sugar (adjust based on rhubarb tartness)
  • 2 tablespoons all-purpose flour
  • 1 teaspoon vanilla extract
  • 1/4 cup water
  • 1 cup all-purpose flour (for topping)
  • 1 cup rolled oats (old-fashioned)
  • 3/4 cup packed light brown sugar
  • 1/2 teaspoon ground cinnamon
  • 1/4 teaspoon salt
  • 1/2 cup (1 stick) cold unsalted butter, cut into small cubes

Instructions

  1. Preheat your oven to 375 degrees F. Lightly grease a 9-inch pie dish or an 8×8 inch baking pan.
  2. Prepare the filling: In a large bowl, combine the chopped rhubarb, granulated sugar, 2 tablespoons of flour, vanilla extract, and water. Toss gently until the rhubarb is evenly coated. Pour the mixture into your prepared baking dish.
  3. Prepare the crunchy topping: In a separate medium bowl, whisk together the 1 cup of flour, rolled oats, brown sugar, cinnamon, and salt.
  4. Cut in the butter: Add the cold, cubed butter to the dry topping mixture. Use your fingers or a pastry blender to cut the butter into the dry ingredients until the mixture resembles coarse crumbs, with some pea-sized pieces remaining. This creates the best crisp texture.
  5. Assemble the crisp: Sprinkle the topping evenly over the rhubarb filling in the baking dish. Do not press it down.
  6. Bake the crisp: Place the dish on a baking sheet (to catch any drips) and bake for 40 to 50 minutes. The topping should be golden brown and the filling should be bubbling thickly around the edges.
  7. Cool and serve: Let the rhubarb crisp cool on a wire rack for at least 20 minutes before serving. This allows the filling to set. Serve warm, perhaps with vanilla ice cream.

Notes

  • For a Strawberry Rhubarb Crisp variation, substitute 2 cups of the rhubarb with 2 cups of hulled and sliced fresh strawberries.
  • If your rhubarb is very tart, you may increase the granulated sugar in the filling by 1 to 2 tablespoons.
  • To achieve an extra nutty flavor, substitute the cold butter in the topping with browned butter. Let the butter cool slightly before cutting it into the dry ingredients.

Nutrition

Find it online: https://juliameal.com/rhubarb-crisp-recipe-easy-homemade-crunchy-topping/