Easy Rhubarb Crisp

Hands down, this easy Rhubarb Crisp is one of my all-time favorite rhubarb treats—quick to whip up and absolutely heavenly topped with a scoop of vanilla ice cream!

Fruity desserts always have a special place in my heart, especially classics like crumbles, crisps, and cobblers that feel cozy and just downright satisfying. Luckily, my neighbor grows tons of rhubarb and happily shares it with me every spring. That means rhubarb pops up in lots of ways around my kitchen each season, but this crisp is always my very first pick.

This recipe is super simple and forgiving — perfect if you’re not a baking pro or if the kids want to lend a hand. Bonus: it doesn’t use any eggs and calls for ingredients you probably already have stocked in your pantry, so you can easily throw it together any time you want a fuss-free dessert with serious comfort vibes.

Try this super simple rhubarb crisp when you want a fast, no-hassle dessert for springtime. Add a scoop of vanilla ice cream on top for that classic, dreamy finish — ideal for Easter or just because you deserve something sweet and simple!

Ingredients

Rhubarb Filling

• 2 pounds sliced rhubarb fresh or frozen; see notes for frozen
• ¼ cup cornstarch
• ¾ cup sugar
• ½ teaspoon ground cinnamon

Crumble Topping

• 1 cup oats
• ½ cup flour
• ½ cup sugar
• ½ teaspoon ground cinnamon
• 1 pinch salt
• 1 stick cold butter cubed (1 stick = 8 tablespoons or ½ cup)

Instructions

• Prep: Start by preheating your oven to 400°F. Give a 2-quart casserole dish a light coat of butter so your crisp won’t stick later on.
• Make the rhubarb filling: Grab a big bowl and toss the rhubarb slices together with the cornstarch, sugar, and cinnamon until everything’s nicely coated. Spread that beautiful mixture evenly into your prepared dish.
• Prepare the crumble topping: In another large bowl, stir together oats, flour, sugar, cinnamon, and salt. Then, cut in the cold, cubed butter until the mix looks like coarse breadcrumbs. This texture is key for a delicious, crumbly top.
• Assemble and bake: Sprinkle that crumble topping evenly over the rhubarb filling. Pop it in your preheated oven and bake for about 35 minutes until the topping turns golden and the filling is bubbling happily. Let it cool on your counter for 10 minutes to thicken before digging in.

Notes

Ingredient notes

• Rhubarb: If fresh isn’t around, frozen rhubarb works just fine. Measure it while frozen, thaw fully before you use it, and drain gently without squeezing. If the thawed rhubarb feels really wet, toss in an extra tablespoon of cornstarch to keep that filling nice and thick.
• Oats: Quick oats work best here for a tender, delicate topping. If you only have old-fashioned oats, the crumble will be chunkier. No worries—just pulse old-fashioned oats a few times in your food processor to break them up a bit.
• Butter: Cold, straight-from-the-fridge butter is your friend for this topping—it helps get the perfect crumbly texture. Need a dairy-free swap? Use stick margarine (not spreadable ones), which works much better for the crumble.
• Cornstarch: This is my thickener of choice for the rhubarb because it blends smoothly with the juices. You can use flour in a pinch, but make sure it sticks to the rhubarb, or it might settle at the bottom and create a floury layer.

Recipe tips

• Be sure to cut that cold butter well into the dry topping mix until it resembles chunky oatmeal cookie dough. This keeps the topping from turning into a dry, grainy crust after baking.
• Rhubarb varies in juiciness, so keep extra cornstarch handy just in case your stalks are extra juicy or large.
• Don’t rush letting the crisp rest for a good 10 minutes after baking. This wait makes all the difference so the filling thickens up and is easier to serve.
• Try not to cut back on sugar here. Rhubarb’s lovely tartness really needs that sweetness to keep things balanced.
• Cover leftovers and keep them on your counter for a day or two — they hold up nicely for a quick snack later.

Nutrition is an estimate.

More recipe information

Course: Dessert

Cuisine: British, Traditional

If you’re all about easy, fruit-packed desserts, this Rhubarb Crisp will become one of your new favorites. It’s a simple bake using mostly pantry basics, no eggs, and delivers a tender, tangy rhubarb layer topped with a crunchy oat crumble. Warm it up and serve with vanilla ice cream for a cozy springtime or Easter dessert that feeds around six people.

This recipe is forgiving and perfect for baking with little ones or when you’re in a crunch. It works wonderfully with fresh or frozen rhubarb. Below, I’ve gathered everything you’ll need to feel confident: handy ingredient tips, step-by-step instructions complete with photos, tricks to avoid gummy fillings or sandy toppings, plus ideas to customize, storage advice, make-ahead options, and answers to your most common questions. Keep scrolling for the printable recipe card at the bottom for quick reference with exact measurements.

Welcome to your go-to easy, no-fuss rhubarb crisp that you’ll want to bake every spring (and anytime you’re lucky enough to score fresh rhubarb). It’s straightforward, uses pantry staples, skips eggs altogether, and produces a tangy, juicy rhubarb filling crowned with a crisp oat topping. Serve it warm and pair with vanilla ice cream for that classic finish everyone loves.

Below you’ll find everything to guide you through: a simple ingredient list (with notes for frozen rhubarb), clear step-by-step instructions packed with photos, practical tips to keep your filling from getting gummy or your topping from becoming sandy, and a handful of easy variations to mix things up. This recipe fills a 2‑quart dish and serves about six—the bake time is around 35 minutes at 400°F.

• Clear, printable recipe card with exact ingredient amounts at the end
• Photo-filled, step-by-step instructions for simple success
• Ingredient swaps and mix-in ideas (think strawberry-rhubarb, nuts, gluten-free and vegan options)
• Storage tips, freezing and reheating info, and answers to common questions

This recipe is really forgiving — perfect for baking with kids or when time is short — so keep scrolling and you’ll soon have a warm, comforting dessert ready to pull from the oven.

Reasons to Make It

This Rhubarb Crisp shines because it’s quick to mix, uses simple pantry staples, and leaves out eggs, making it a fail-safe dessert anyone can bake. It’s easy enough to make alongside little helpers, works well with fresh or frozen rhubarb (see our guide to preparing, storing, freezing, and cooking with rhubarb), and bakes into a tart, juicy filling topped with crunchy oats. Serve it warm with vanilla ice cream for a treat that’s just right at casual dinners, gatherings, or as a special Easter dessert to feed about six people.

What You Need to Gather

• 2 pounds sliced rhubarb (fresh or frozen; see notes for frozen)
• ¼ cup cornstarch
• ¾ cup sugar
• ½ teaspoon ground cinnamon
• 1 cup oats
• ½ cup flour
• ½ cup sugar
• ½ teaspoon ground cinnamon
• 1 pinch salt
• 1 stick cold butter, cubed (1 stick = 8 tablespoons or ½ cup)

Step-by-Step Baking Directions

1. Preheat oven to 400°F.
2. Lightly butter a 2‑quart casserole dish.
3. If using frozen rhubarb, measure it while frozen, thaw completely, and drain gently; if very wet, add 1 tablespoon extra cornstarch.

4. Toss rhubarb slices with ¼ cup cornstarch, ¾ cup sugar, and ½ teaspoon ground cinnamon until well coated.

   

5. Spread and press the rhubarb mixture evenly into the prepared dish.
6. If using old‑fashioned oats, pulse them a few times in a food processor to break them up.
7. In a large bowl, stir together 1 cup oats, ½ cup flour, ½ cup sugar, ½ teaspoon ground cinnamon, and a pinch of salt.

8. Cut 1 stick cold, cubed butter into the dry topping until the mixture resembles coarse crumbs.

   

9. Sprinkle the crumble topping evenly over the rhubarb filling.
10. Bake about 35 minutes, until the topping is golden brown and the filling is bubbling.

11. Let the crisp cool on the counter for 10 minutes to thicken before serving.

    

Pro Tips for Best Texture

• Make sure to really work the cold butter into the dry topping ingredients so you end up with a thick, crumbly dough—like the topping in British Rhubarb Crumble. This stops the topping from turning grainy or floury after baking.
• Remember, rhubarb’s water content can really vary. If your stalks are extra juicy or overgrown, or you’re using frozen rhubarb, add a little extra cornstarch to help the filling hold together perfectly.
• Be patient and let the crisp rest the full 10 minutes after baking. That little wait makes a huge difference for a thick, cozy filling that stays put when you serve.

• Don’t cut back on the sugar too much — that sweetness is what balances rhubarb’s bright tartness just right.

This rhubarb crisp is delicious served warm, straight from the oven. Top it generously with vanilla ice cream or a dollop of whipped cream for a simple, classic dessert everyone will love. For a fresh touch, sprinkle some chopped fresh mint or a light dusting of powdered sugar on top right before serving.

Want something a little more indulgent? Serve alongside a scoop of custard or drizzle with caramel sauce to elevate it for special occasions.

Flavor Twists and Substitutions

• Strawberry-rhubarb magic: Stir in 1 to 1½ cups of chopped strawberries with your rhubarb for a sweeter and juicier filling that’s a total crowd-pleaser—or explore the classic combo in a strawberry-rhubarb pie recipe.
• Apple swap: Mix in up to a pound of peeled, chopped apples instead of some rhubarb for a gentle, cozy fall flavor.
• Berry blend: Add blueberries or raspberries to jazz up the color and flavor—it’s colorful and delicious.
• Spicy or fresh zing: Add ½ teaspoon ground ginger or 1-2 teaspoons lemon zest to brighten the filling with extra flavor pop; if you love lemon + rhubarb, try this lemon rhubarb loaf.
• Nutty twist: Stir ½ cup chopped pecans or sliced almonds into your topping for crunchy, nutty texture.
• Gluten-free: Use certified gluten-free oats and swap the flour for your favorite gluten-free blend or almond flour.
• Vegan swap: Use vegan stick margarine (not spreads) instead of butter for a dairy-free crisp that’s just as tasty.
• Deeper flavor: Swap some or all of the white sugar in the topping with brown sugar for a richer, caramel-like flavor.

If you want to mix things up, try adding some chopped strawberries or berries to the rhubarb for a fruity boost. For a cozy fall vibe, swap a portion of the rhubarb for apples. You can also throw in chopped nuts like pecans or almonds into the topping for extra crunch. For a dairy-free twist, replace the butter with vegan margarine.

If you need it gluten-free, just swap the oats and flour for certified gluten-free versions or nut flours. To add some zing, toss in lemon zest or a pinch of ginger to the filling.

How to Store and Reheat

Once your crisp is baked and cooled, store any leftovers covered on the counter, out of direct sunlight, for 1-2 days. It’s best enjoyed within this window for the freshest taste and texture.

When you’re ready for a treat later, just microwave an individual portion for a warm, quick delight.

To keep your rhubarb crisp fresh, store any leftovers covered at room temperature for up to two days. If your kitchen tends to be warm, placing it in the fridge is a safe alternative, which will keep it good for about three to four days.

When storing, make sure it’s tightly covered to prevent it from drying out or absorbing other fridge odors. This crisp reheats beautifully, so don’t worry if you want to enjoy it days after baking.

This rhubarb crisp is a great make-ahead dessert. If you love make-ahead breakfasts too, try Rhubarb Overnight Oats. You can assemble the filling and crumble topping in your dish, cover it tightly, and refrigerate for up to 24 hours before baking. When you’re ready, just pop it straight into the preheated oven.

You can also bake it ahead of time and then gently reheat individual portions in the microwave or warm the whole dish at 325°F until heated through. It’s perfect for busy weeknights or planning ahead for a holiday meal.

Quick Answers to Common Questions

• Can I use frozen rhubarb? Absolutely! Just measure it frozen, thaw completely, drain gently without squeezing, and if it’s extra wet, add a tablespoon more cornstarch to keep things nice and thick.
• What if I only have old-fashioned oats? They’ll work just fine, but your topping will be chunkier. To get it closer to quick oats texture, pulse them a couple of times in your food processor.
• Can I substitute the butter? Yes! If you need a dairy-free option, use stick margarine, not buttery spreads, since they produce the best texture for the crumble.
• Can I reduce the sugar? I wouldn’t recommend it — rhubarb is tart and the sugar balances it perfectly.
• How should I store and reheat leftovers? Keep leftovers covered on the counter for 1-2 days. For reheating, zap in the microwave or warm the crisp in a 325°F oven until hot.
• Why did my topping turn out sandy? Probably because the butter wasn’t mixed thoroughly enough. Make sure to cut it in really well until the mixture looks like coarse crumbs for that perfect crumble. For an example of the same technique, see the streusel in Sour Cream Rhubarb Coffee Cake.
• Can I make this ahead or freeze it? Yes! You can prepare the filling and topping ahead and refrigerate briefly before baking. The baked crisp can be cooled, wrapped tightly, and frozen. Just thaw and warm before serving.

• Can I use frozen rhubarb? Yes! Just remember to thaw it completely and drain gently before using. If it seems very wet, add a bit extra cornstarch to keep the filling thick.
• What type of oats should I use? Quick oats work best for a tender topping, but old-fashioned oats are fine if pulsed briefly to break them down. For another oat-forward dessert crust, try the Rhubarb Tart with Oat Crust.
• How can I make this recipe vegan? Swap out the butter for a stick-style vegan margarine and use all other ingredients as usual.
• Is this dessert sweet enough? Rhubarb is naturally tart, so the sugar balances it perfectly. I recommend sticking to the suggested amount for best flavor.
• Can I prepare this in advance? Absolutely! Assemble and refrigerate the unbaked crisp up to one day ahead and bake when ready. Baked leftovers can be refrigerated and gently reheated.