Strawberry Rhubarb Crisp

This strawberry rhubarb crisp is everything you want in a cozy dessert — a lovely mix of sweet and tart fruit topped with a buttery oat crumble that’s crunchy and chewy all at once. Honestly, I can’t resist eating it warm with a big scoop of vanilla ice cream melting on top!

Growing up, my dad was totally hooked on rhubarb. I wonder if it’s a generation thing? Most folks I know today haven’t even given rhubarb a try, yet it always seemed like every parent loved it. Me? I used to avoid it at all costs! I wouldn’t even go near the stuff. Now, I’m still a little iffy depending on how it’s cooked, but when you simmer rhubarb alongside sweet berries and sugar, it transforms completely. It’s magical — tangy-sweet with a cozy vibe that’s hard to beat.

What Makes It Irresistible

This strawberry rhubarb crisp ticks all the boxes for a brilliant summer dessert: vibrant, tangy fruit softened just right, balanced with sweetness, and topped with a rich, crunchy oat crumble — and if you love that texture, try our Classic Apple Crumble next. It’s easy to whip up, freezer-friendly, and always a hit — especially when served warm topped with melting vanilla ice cream.

• Perfect sweet-tart balance: cooking mellows the rhubarb’s tartness and lets it play beautifully with the strawberries for a fresh, zesty filling; for another way to spotlight rhubarb’s tang, try this Rhubarb & Orange Frangipane Galette.
• Buttery, chewy topping: old-fashioned oats plus brown sugar deliver a topping that’s satisfyingly textured and truly the best part of the dish.
• Quick and forgiving: preparation takes about 15 minutes, and baking another 30. Using frozen fruit (thawed and drained) works brilliantly, and you can easily swap thickening agents to your liking.
• Make-ahead and freezer-friendly: prep the topping or even the whole crisp in advance, and freeze pre- or post-baking for hassle-free entertaining.
• Adjustable: this recipe makes 8 servings and can be scaled up (for example, boosting the filling 1.5× for a 9×13″ pan), which is perfect for both small families and larger get-togethers.
• Wholesome ingredients: loaded with rolled oats and fresh fruit, plus rhubarb’s antioxidants and vitamin K, this treat feels more homemade and nourishing than a heavy pastry dessert.

Ingredients for Filling and Topping

• 4 Cups Rhubarb, chopped
• 4 Cups Strawberries, chopped
• 1/2 Cup Sugar
• 1/2 Cup Brown Sugar
• 3 Tablespoons Thickening agent, or 3 tablespoons flour, or 3 tablespoons cornstarch
• 1 Lemon, zested
• 1/4 teaspoon Cardamom
• 1 Cup Old Fashioned Rolled Oats
• 1 Cup Brown Sugar
• 3/4 Cup Flour
• 1/2 teaspoon Cinnamon
• 1/4 teaspoon Salt
• 1/2 Cup Unsalted Butter

Prep, Fill, and Bake

1. Preheat oven to 350°F (175°C).
2. Wash, hull, and chop the strawberries; chop the rhubarb.
3. Place the chopped rhubarb in a bowl, boil about 3 cups of water, pour it over the rhubarb and let soak 2 minutes, then drain and pat dry.

4. If using frozen fruit, thaw completely and drain off any excess liquid.

   

5. Mix all dry topping ingredients (oats, brown sugar, flour, cinnamon, salt).
6. Cut the unsalted butter into small pieces and work it into the dry topping until it starts to clump; set aside.
7. In a large bowl combine the prepared rhubarb, chopped strawberries, sugar, brown sugar, cardamom, lemon zest, and thickening agent; gently fold to combine.

8. Grease a deep-dish pie plate or an 8×8″ baking dish and pour the fruit mixture into it.

   

9. Scatter the oat topping evenly over the fruit mixture.

10. Bake at 350°F for about 30 minutes, until the topping is golden and the filling is bubbling.

    

Tips for Perfect Texture and Serving

I’m not a fan of rhubarb that still tastes bitter or feels crunchy when it should be soft. That’s why I always pour boiling water over it beforehand — it makes a huge difference for smooth, mellow fruit.

Like any fruit crisp dessert, this one is on another level when served warm with a big scoop of vanilla ice cream melting right on top. It really is the ultimate comfort food — the same cozy treatment that makes our Easy Peach Cobbler with Canned Peaches so irresistible.

And if you want to mix it up, a dollop of whipped cream is also fantastic! Funny enough, if you skip the toppings altogether, this crisp kind of feels like a sweet breakfast treat. Craving a true breakfast bake? Try Blueberry Buttermilk Pancake Casserole. What do you think — breakfast or dessert?

Flavor Swaps and Add-Ins

When it comes to thickening, I tend to prefer gel thickeners since they usually don’t add flavor, unlike flour or cornstarch which can sometimes give a starchy taste. But if you haven’t got a gel thickener or don’t want to buy one, plain flour or cornstarch does the trick just fine.

Now, if you’re like me and totally obsessed with the topping, try bumping the amounts up to 1 1/2 cups each of oats and brown sugar, 3/4 cup butter, plus 1/4 teaspoon salt and 1/2 teaspoon cinnamon. That’s my personal favorite ratio for the best oat topping ever. For a nutty twist on that crunchy top, check out the pistachio crumb on this Rhubarb Rose Upside-Down Cake with Pistachio Crumb. FYI: This is the amount I use for a 9×13″ pan topping too — just remember to increase the fruit filling by one and a half times for that bigger pan.

Make-Ahead and Freezing Tips

This topping is a superstar for make-ahead prep! You can mix it up a day ahead and store it in the fridge, or freeze it sealed in a Ziploc bag for 3-4 months. The whole crisp can be made ahead and frozen — either before or after baking. Just wrap it tightly with plastic wrap and foil before freezing.

When you’re ready to bake from frozen, take off the plastic wrap, put the foil back on, and bake for 50-60 minutes until hot and bubbly.

Once baked, you can store leftover strawberry rhubarb crisp covered in the fridge for up to 4-5 days. It reheats beautifully, making it a perfect make-ahead dessert or a sweet treat for busy weeknights. If you love rhubarb-forward, make-ahead desserts, consider the Rhubarb Dream Bars.

Troubleshooting and Common Questions

Worried about using frozen fruit? No problem! Just make sure to thaw the rhubarb and strawberries completely and drain off any extra liquid before mixing them into your filling. This helps keep everything from getting soggy.

Since both rhubarb and strawberries release a lot of juice as they cook, using the right thickener is key to keep your filling perfect. Whether you stick with gel, cornstarch, or flour, mixing it well into the fruit before baking helps your crisp set nicely without turning watery.