This easy rhubarb crisp recipe pairs a bright, tangy rhubarb filling with a thick, buttery oat topping. It’s a classic, old-fashioned dessert that’s simple to make and always crowd-pleasing.
I know every cook says their recipe is the best, but this one really stands out. When I received a bag of fresh rhubarb the other day, this was the first dessert I wanted to make: Mom’s Rhubarb Crisp. It’s an old-fashioned recipe—easy, comforting, and full of flavor.
I’ve tried many crisps over the years and this version consistently delivers the right balance of sweet and tart. The rhubarb filling is bright and juicy, and the thick, buttery oat topping adds a satisfying crunch and richness that makes this dessert memorable.
Why You’ll Love this Old-Fashioned Rhubarb Crisp Recipe
- Perfect sweet-tart balance – Just enough sugar to temper rhubarb’s tartness while allowing its flavor to shine.
- Generous, thick topping – A rich, buttery oat crumble that bakes up golden and crisp.
- Simple pantry ingredients – No exotic items required; easy to make anytime.
- Great for spring and summer – Ideal for using fresh garden rhubarb or market finds.
- Make ahead or freeze – Assemble ahead of time or freeze baked or unbaked portions for convenience.
Ingredients for Rhubarb Crisp (9×13 pan)
(Exact measurements and instructions are provided in the recipe card below.)
- Rhubarb – Fresh or frozen, cut into 1/2-inch pieces.
- Granulated sugar – Sweetens the filling and draws out juices.
- All-purpose flour – Helps thicken the filling.
- Brown sugar – Adds a deep, caramel flavor to the topping.
- Old-fashioned oats – For a crunchy, hearty topping texture.
- Butter – Gives the topping richness and helps it brown.
The BEST Rhubarb Crisp Recipe Ever!
Make a classic rhubarb crisp with a tangy, juicy filling and a crunchy oat topping that browns beautifully. Serve warm with ice cream or whipped cream for a comforting dessert.
Ingredients
- 5 cups rhubarb, cut in 1/2-inch pieces
- 3 tablespoons all-purpose flour (for the filling)
- 1 1/2 cups granulated sugar (for the filling)
- 1 cup brown sugar (for the topping)
- 1 1/2 cups all-purpose flour (for the topping)
- 1 cup old-fashioned oats
- 1 cup butter (cold and cut into pieces, or melted for the shortcut)
Instructions
- Preheat the oven to 350°F (175°C). In a large bowl, toss the rhubarb with 3 tablespoons flour and 1 1/2 cups granulated sugar until evenly coated. Spread the mixture in the bottom of a 9×13-inch baking pan.
- In another bowl, combine 1 cup brown sugar, 1 1/2 cups flour, and 1 cup oats. Cut in 1 cup of cold butter with a pastry blender until the mixture resembles coarse crumbs. For a quicker method, melt the butter, stir it into the dry topping mix, then chill briefly to firm up before topping the fruit.
- Evenly spread or sprinkle the topping over the rhubarb and gently press it down to cover the fruit.
- Bake at 350°F for about 45 minutes, until the topping is golden brown and the filling is bubbling around the edges.
- Let the crisp cool slightly to allow the filling to set, then serve warm or at room temperature. Delicious with vanilla ice cream or whipped cream.
Notes
Yield: 12 servings. Serving size will vary. Amount per serving will depend on portion size and any toppings served with the crisp.
How to Portion, Cook, and Freeze This Recipe to Fit Your Lifestyle
Making for two? Halve the recipe and bake in an 8×8-inch dish. Freeze unbaked: Assemble the crisp, cover tightly, and freeze. Thaw at room temperature for about 15 minutes before baking and add 10–15 minutes to the baking time if needed. Freeze baked: Bake fully, cool completely, cover tightly, and freeze. Reheat until warmed through before serving.
Step-by-Step Instructions for Rhubarb Crisp
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1. Toss rhubarb with sugar and flour, then spread it in a baking dish. -
2. Mix the oatmeal topping and cut in the butter, or use the melted-butter shortcut. -
3. Pat the topping over the rhubarb so it bakes evenly. -
4. Bake until golden brown and bubbling around the edges.
Kitchen Hack: Use Melted Butter for Crisp Toppings
I often use a simple shortcut: melt the butter and stir it into the dry topping ingredients, then chill the mixture briefly in the refrigerator while you prepare the fruit. This saves time and still produces a nicely textured, crunchy topping. If you prefer a more crumbly texture, use cold butter and cut it in with a pastry cutter.
Tips for a Successful Rhubarb Crisp
- Fresh or frozen rhubarb: Both work well. If using frozen, no need to thaw; add a few extra minutes to the bake time.
- Melted butter shortcut: Melting the butter speeds preparation—chill briefly if it becomes too soft before baking.
- Allow a short rest: Let the crisp cool for 10–15 minutes so the filling thickens slightly and is easier to serve.
More Dessert Ideas
- Apple crisp with a similar oat topping
- Lemon meringue pie for a bright citrus finish
- Banana cream pie, a classic creamy option
- Peach crisp for late-summer fruit
- Rhubarb cake or rhubarb pudding for more rhubarb-focused desserts
Save This Recipe
Bookmark or save this rhubarb crisp recipe so you can find it when rhubarb is in season. This classic dessert is always worth making again.
