Name: Air Fryer Rhubarb Crisp
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Ingredients: 5 cups rhubarb (sliced into ½-inch pieces); ½ cup granulated sugar; 2 tablespoons cornstarch; 1 teaspoon ground cinnamon; 1 cup old-fashioned rolled oats; ½ cup all-purpose flour; ¾ cup brown sugar (packed); 1½ teaspoons ground cinnamon; ½ cup unsalted butter (melted)

Jump to Recipe Print Recipe

Air fryer rhubarb crisp is the kind of dessert that feels cheerful from the first bite. The filling is tart, juicy, and warmly spiced with cinnamon, while the topping bakes up buttery and crumbly with rolled oats and brown sugar. It has the comfort of a classic fruit crisp, but the air fryer keeps the process short and easy.

This air fryer rhubarb crisp is also a handy choice when you do not want to heat the whole oven. With just 10 minutes of prep and a 20-minute cook time, it comes together fast and still feels special enough for guests or a Sunday dessert. Serve it warm with vanilla ice cream or whipped cream, and the sweet topping balances the fresh tang of rhubarb beautifully.

Because the recipe uses basic pantry ingredients, air fryer rhubarb crisp is a great way to turn a bunch of rhubarb into something simple and satisfying. It feeds six, works well in spring and early summer, and has a homemade feel that never goes out of style.

Why This Air Fryer Rhubarb Crisp Works

There is a lot to like about this air fryer rhubarb crisp, starting with the contrast in texture. The rhubarb softens as it cooks, turning tender and spoonable, while the oat topping becomes golden and lightly crisp on top. That mix of soft fruit and crumbly topping is what makes a crisp so comforting.

The cinnamon in both layers also helps tie the dessert together. It adds warmth without covering up the clean, tart flavor of the rhubarb. That matters here, because rhubarb is the star. Instead of getting lost under heavy spices or lots of mix-ins, it still tastes fresh and bright.

Another reason this air fryer rhubarb crisp stands out is the shorter cooking time. Air fryers heat quickly and keep the dessert compact, which is useful when you want a homemade dessert without a long wait. The filling cooks until tender, and the topping browns in about 20 minutes at 350℉. For busy days, that is a nice bonus.

Ingredients

For the filling, you need sliced rhubarb, granulated sugar, cornstarch, and ground cinnamon. The rhubarb is cut into ½-inch pieces so it cooks evenly, while the sugar softens its tart edge. Cornstarch helps the fruit juices thicken into a spoonable filling instead of a watery one. Cinnamon adds warmth and depth.

For the topping, the recipe uses old-fashioned rolled oats, all-purpose flour, brown sugar, ground cinnamon, and melted unsalted butter. The oats give the topping body and texture, while the flour and butter help it hold together in crumbles. Brown sugar adds a deeper sweetness that pairs very well with tart rhubarb.

Here is the full ingredient list:

For the Filling
- 5 cups rhubarb, sliced into ½-inch pieces
- ½ cup granulated sugar
- 2 tablespoons cornstarch
- 1 teaspoon ground cinnamon
For the Topping
- 1 cup old-fashioned rolled oats
- ½ cup all-purpose flour
- ¾ cup brown sugar, packed
- 1½ teaspoons ground cinnamon
- ½ cup unsalted butter, melted

How to Make Air Fryer Rhubarb Crisp

Start by making the filling. In a large bowl, combine the sliced rhubarb, granulated sugar, cornstarch, and ground cinnamon. Toss until the rhubarb is well coated. This step matters because the sugar and cornstarch need to be spread evenly over the fruit.

In a second bowl, make the topping. Stir together the rolled oats, flour, brown sugar, and cinnamon. Pour in the melted butter and mix until the topping looks crumbly. You want the dry ingredients moistened well enough to clump lightly, but not mashed into a paste.

Lightly grease a cake pan or baking dish that fits inside your air fryer basket. Spread the rhubarb mixture evenly in the bottom, then scatter the oat topping over the fruit. Try to cover the surface from edge to edge so every spoonful gets a little of both layers.

Preheat the air fryer to 350℉. Once hot, place the dish in the basket and cook for 20 minutes. The topping should look golden brown, and the rhubarb should be tender enough to pierce easily with a fork. If the filling is bubbling at the edges, that is a good sign the crisp is ready.

Let the air fryer rhubarb crisp sit for a few minutes before serving. That short rest helps the filling settle slightly. Spoon it into bowls and serve warm with vanilla ice cream or whipped cream for a classic finish.

Substitutions and Variations

The source recipe already gives a few smart ways to change this dessert without losing its character. If your rhubarb is very tart, add an extra tablespoon or two of sugar to the filling. That small change can make the flavor feel rounder and more balanced.

You can also add fruit to soften the tang of the rhubarb. Strawberries, apples, or cranberries are all listed in the recipe notes. Strawberries bring sweetness and a softer fruit flavor, apples add body, and cranberries keep the filling bright and tangy while changing the flavor a bit.

Cooking for two instead of six? You can halve the recipe and use a smaller baking dish. That makes this air fryer rhubarb crisp even more practical for smaller households.

The recipe card also includes an oven option. If you would rather bake it in the oven, place the dish in a 375℉ oven and bake for 35 to 40 minutes.

How to Store Air Fryer Rhubarb Crisp

Once the crisp has cooled, cover the dish or transfer leftovers to a container and refrigerate them. Rhubarb crisp is at its finest when the topping still has a little texture, so reheating before serving is a good idea.

For reheating, warm individual portions until heated through. That helps the fruit loosen back up and gives the topping some life again. It is a simple way to enjoy leftover air fryer rhubarb crisp without losing the contrast between the filling and the crumb topping.

When making it ahead for guests, it is also helpful to remember that this dessert shines when served warm. The filling feels softer and the topping tastes richer just after reheating.

Top Tips

Use rhubarb sliced into even ½-inch pieces. That helps it cook at the same rate, so you do not end up with some pieces still firm while others turn too soft.

Preheat your air fryer before adding the dish. Starting in a hot air fryer helps the topping brown more evenly during the 20-minute cook time.

Choose a pan that fits comfortably in the basket. If the pan is too large or crowded, the hot air will not move around it as well.

Mix the melted butter into the topping until the dry ingredients are coated and crumbly. If dry pockets remain, the topping can bake unevenly.

Serve the dessert warm. Air fryer rhubarb crisp tastes especially nice right after cooking, when the topping is golden and the filling is still bubbling lightly underneath.

Common Mistakes to Avoid

One of the most common problems with fruit crisp is a runny filling. In this recipe, the cornstarch helps with that, so do not skip it or cut it back.

Another issue is underbaking. If the topping looks pale or the rhubarb is still firm, the dessert needs a bit more time. The topping should look golden, and the fruit should be easy to pierce with a fork.

Packing the topping down too firmly can also change the final texture. Sprinkle it over the filling rather than pressing it into a solid layer. That keeps the topping lighter and more crumbly.

Using a dish that does not fit the air fryer basket well can create uneven cooking. Before you start mixing, check that your pan fits your air fryer comfortably.

Finally, do not forget the balance of tart and sweet. Rhubarb can vary, so the note about adding an extra tablespoon or two of sugar is worth keeping in mind if your stalks taste especially sharp.

Air Fryer Rhubarb Crisp FAQs

Can I use frozen rhubarb?

The recipe is written with fresh rhubarb sliced into ½-inch pieces. Frozen rhubarb directions are not provided in the source recipe, so the closest result will come from using fresh rhubarb as written.

Do I need to peel the rhubarb?

No peeling step is listed in the recipe. Just slice the rhubarb into ½-inch pieces and use it in the filling.

Can I make this ahead of time?

Specific make-ahead directions are not provided in the recipe card. For the best texture, this dessert is especially nice served warm soon after cooking.

Can I make this in the oven instead?

Yes. The recipe notes include an oven method: bake the crisp in a 375℉ oven for 35 to 40 minutes.

Air fryer rhubarb crisp is a lovely way to put fresh rhubarb to use when you want something homemade, cozy, and not too complicated. It has a bright fruit filling, a buttery oat topping, and a short cook time that makes dessert feel very doable any day of the week.