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A bowl of rhubarb crisp with ice cream. The rhubarb dessert is in a white bowl with a spoon and you can see the corner of the rhubarb crisp in the back corner.
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Rhubarb Crisp Recipe (Easy and Old-Fashioned)

This easy rhubarb crisp is made with a simple oat topping and tender, tart rhubarb. It works well with fresh or frozen rhubarb and is a dependable, old-fashioned dessert.
Course Dessert
Cuisine American
Keyword easy dessert, rhubarb crisp, rhubarb recipe
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings 12 servings
Cost $2

Equipment

  • 1 7 by 11 inch pan

Ingredients

Rhubarb Filling

  • 8 cups Prepared rhubarb, cut into ¾-inch slices For strawberry rhubarb crisp, use 4 cups rhubarb and 4 cups strawberries
  • ½ cup Granulated sugar
  • ¼ cup All-purpose flour 1/3 cup if adding strawberries
  • 1 tsp ground cinnamon

Crumb Topping

  • ½ cup Old-fashioned rolled oats
  • 1 cup All-purpose flour
  • 1 tsp Cinnamon
  • ½ cup Butter, melted

Instructions

Step 1: Prepare the Oven and Pan

  • Preheat the oven to 350°F. Butter a 9-by-13-inch baking dish and set aside.

Step 2: Make the Rhubarb Filling

  • Wash, trim and toss the rhubarb leaves. Cut fresh rhubarb stalks into 3/4 inch slices. You can also use already cut up frozen rhubarb.
    Preparing washed rhubarb for rhubarb recipe. There rhubarb is being cut into 3/4 inch slices on a cutting board.
  • Place the rhubarb, sugar, and flour into a large bowl and toss until evenly coated. Transfer the mixture to the prepared pan and spread it into an even layer. Sprinkle the cinnamon evenly over the rhubarb.
    Rhubarb coated in flour, sugar and cinnamon inside a baking dish. The rhubarb filling for a rhubarb crisp
  • This is a good time to adjust the cinnamon or sweetness to your taste. A little extra cinnamon adds warmth and helps balance the sweetness of the rhubarb if you prefer a less-sweet dessert.

Step 3: Make the Crumb Topping

  • In the same bowl used for the rhubarb (to save dishes), combine the oats and brown sugar, stirring to break up and evenly distribute the sugar so the topping isn’t too dense.
  • Add the flour and cinnamon and stir again. Pour the melted butter over the mixture and blend until evenly incorporated.
    A large mixing bowl with oatmeal, flour and brown sugar. The crumb layer for rhubarb crisp.
  • Pour the melted butter on top and blend until incorporated. Place on top of the rhubarb filling. Spread so everything is covered.
    Mixing together rhubarb crisp recipe crumb coating. The crumb coating is a golden brown colour with flour, butter, brown sugar, oatmeal and cinnamon.

Step 4: Assemble and Bake the Crisp

  • Sprinkle the crumb topping evenly over the rhubarb filling, spreading it gently so the fruit is fully covered.
    A rhubarb crisp recipe thats been baked. The rhubarb crisp is in a large black cereamic dish and is cooling on a cutting board.
  • Bake at 350°F for 45–50 minutes, or until the topping is golden and the rhubarb is tender when pierced with a fork.
  • Remove from the oven and let the crisp cool for at least 10 minutes before serving.