This easy rhubarb crisp recipe strikes the perfect balance between tangy rhubarb filling and a generous, thick oat topping. It’s a classic, old-fashioned dessert that’s simple to make and wonderfully comforting.
I’m serious when I say this is my favorite way to use rhubarb. When a bag of fresh rhubarb landed on our doorstep, this rhubarb crisp was the first thing I made. The combination of tart rhubarb, the right amount of sugar, and a thick, buttery oat topping is what makes this recipe stand out.
Why You’ll Love This Old-Fashioned Rhubarb Crisp Recipe
- Perfect sweet-tart balance – Just enough sugar to highlight rhubarb’s tang without overwhelming it.
- Generous oat topping – Thick, buttery, and crunchy rather than sparse or dry.
- Simple pantry ingredients – No fancy ingredients required, making it easy to prepare any time.
- Great for spring and summer – Ideal for fresh rhubarb from the garden or market.
- Make-ahead friendly – Both assembled and baked versions freeze well for future meals.
Ingredients for a 9×13-inch Rhubarb Crisp
See the instructions below for full directions and baking times.
- 5 cups rhubarb, cut into 1/2-inch pieces (fresh or frozen)
- 3 tablespoons flour (for the fruit filling)
- 1 1/2 cups granulated sugar (for the fruit filling)
- 1 cup brown sugar (for the topping)
- 1 1/2 cups flour (for the topping)
- 1 cup oats (old-fashioned rolled oats work best)
- 1 cup butter (cold and cut in, or melted — see the kitchen hack)
Yield, Prep, and Cook Times
- Yield: about 12 servings
- Prep time: ~15 minutes
- Cook time: ~45 minutes
- Total time: ~1 hour
The BEST Rhubarb Crisp Recipe Ever!
Ingredients (repeated for clarity)
- 5 cups rhubarb, cut in 1/2-inch pieces
- 3 tablespoons flour (for the rhubarb)
- 1 1/2 cups sugar (for the rhubarb)
- 1 cup brown sugar (topping)
- 1 1/2 cups flour (topping)
- 1 cup oatmeal (topping)
- 1 cup butter (topping)
Instructions
- Preheat the oven to 350°F (175°C). In a large bowl, toss the rhubarb with 3 tablespoons of flour and 1 1/2 cups of granulated sugar until evenly coated. Spread the rhubarb mixture across the bottom of a 9×13-inch baking dish.
- In a separate bowl, combine the brown sugar, 1 1/2 cups flour, and the oats. Cut in the butter with a pastry blender or fork until the mixture resembles coarse crumbs and chunky oats.
- Evenly sprinkle the topping over the rhubarb and gently press it down so it forms a compact layer.
- Bake at 350°F for about 45 minutes, or until the topping is golden brown and the filling is bubbling along the edges.
- Serve warm or at room temperature, plain or with a scoop of vanilla ice cream or whipped cream.
Notes on Nutrition
Nutrition will vary depending on portion size and any additions such as ice cream. If you need exact values, calculate them based on the ingredients and serving sizes you use.
How to Portion, Cook, and Freeze This Rhubarb Crisp
Making a smaller batch: Halve the ingredients and bake in an 8×8-inch pan for a smaller household.
Freeze unbaked: Assemble the crisp, cover tightly, and freeze. When ready to bake, thaw at room temperature for 15 minutes to remove chill and add 10–15 minutes to the bake time as needed.
Freeze baked: Bake as directed, cool completely, then wrap tightly and freeze. Reheat in the oven until warmed through.
Step-by-Step Photo Guide
Kitchen Hack: Use Melted Butter for the Topping
If you want a faster method, melt the butter and stir it into the dry ingredients until evenly moistened, then chill the mixture briefly while you prepare the filling. This shortcut saves time and still creates a delicious, crumbly topping. If you prefer a more traditional texture, cut cold butter into the dry mix with a pastry cutter until pea-sized crumbs form.
Tips for the Best Rhubarb Crisp
- Fresh or frozen rhubarb: Either works. If using frozen, add a few extra minutes to the baking time—no need to thaw.
- Let it rest: Allow the crisp to cool slightly after baking so the filling sets and is easier to serve.
- Adjust sweetness: Increase or decrease the sugar in the filling to suit your taste and the tartness of the rhubarb.
- Serve warm: A scoop of vanilla ice cream or a dollop of whipped cream makes this dessert extra special.
More Dessert Ideas
- Baked sticky rhubarb pudding — another cozy rhubarb treat to try.
- Classic apple crisp — similar technique with apples instead of rhubarb.
- Strawberry desserts and other fruit crisps for summer gatherings.
- Lemon meringue and banana cream — timeless favorites for special occasions.
Pin this recipe to save it for later and to remember how simple and rewarding a homemade rhubarb crisp can be. Enjoy this easy, tangy dessert any time rhubarb is in season.
