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A golden-brown best rhubarb crisp in a baking dish, fresh from the oven

Best Rhubarb Crisp with Golden Oat Streusel

This classic rhubarb crisp combines tart rhubarb with a sweet, buttery golden oat streusel topping for a delightful dessert that's both comforting and easy to make.
Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings 8 servings
Calories 350 kcal

Equipment

  • 9x13 inch baking dish
  • large bowl
  • medium bowl
  • whisk
  • pastry blender (optional)

Ingredients
  

For the filling

  • 6 cups rhubarb chopped into 1-inch pieces
  • 1 cup granulated sugar
  • 2 tablespoons all-purpose flour
  • 1 teaspoon vanilla extract

For the streusel topping

  • 1 cup all-purpose flour
  • 3/4 cup rolled oats
  • 1/2 cup packed light brown sugar
  • 1/4 cup granulated sugar
  • 1/2 teaspoon ground cinnamon
  • 1/2 cup unsalted butter cold and cubed

Instructions
 

For the filling

  • Preheat your oven to 375°F (190°C) and lightly grease a 9x13 inch baking dish.
  • In a large bowl, combine the chopped rhubarb, granulated sugar, flour, and vanilla extract; mix well to ensure the rhubarb is evenly coated.
  • Pour the rhubarb mixture into the prepared baking dish and spread it evenly.

For the streusel topping

  • In a separate medium bowl, whisk together the flour, rolled oats, brown sugar, granulated sugar, and cinnamon.
  • Add the cold, cubed butter to the dry ingredients and use your fingertips or a pastry blender to cut it in until the mixture forms coarse crumbs.
  • Evenly sprinkle the streusel topping over the rhubarb filling in the baking dish.

Bake and serve

  • Bake for 45-55 minutes, or until the rhubarb is tender and bubbly and the streusel is golden brown and crispy.
  • Let the crisp cool for at least 15-20 minutes before serving warm, optionally with a scoop of vanilla ice cream or a dollop of whipped cream.

Notes

For extra flavor, you can add a pinch of ground ginger or nutmeg to the rhubarb filling. If your rhubarb is very tart, you might want to add a tablespoon or two more of granulated sugar to the filling.