I first made this strawberry rhubarb crisp the summer I had too many rhubarb stalks and a bowl of perfect strawberries on the counter. The bright tartness of the rhubarb balances the berries, and the oat crumble gives everything a homey crunch. If you like strawberry desserts, you might also enjoy A Tale of Two Strawberry Pies, which leans into the same sweet-tart vibe in pie form.

Why you’ll love this dish

This crisp is the kind of dessert that shows up at backyard dinners, weeknight suppers, and casual brunches with equal grace. It is:

• Quick to pull together in one bowl for the filling and another for the topping.
• Budget-friendly because it uses pantry staples: oats, flour, and a touch of butter.
• Kid-approved: the texture contrast between bubbling fruit and crunchy topping is a crowd-pleaser.
• Flexible: it works with fresh or frozen fruit and adapts well to smaller or larger baking dishes.

Make it when strawberries and rhubarb are in season, or anytime you want something warm and comforting without fuss.

Step-by-step overview

You will toss the fruit with sugar, cornstarch, and vanilla, then spread it in a greased dish. The crisp topping is a simple mix of oats, flour, brown sugar, melted butter, and cinnamon that you crumble over the fruit. Bake until the filling bubbles and the top is golden. Expect about 15 minutes prep and 45 minutes baking time.

What you’ll need

• 2 cups sliced strawberries
• 2 cups sliced rhubarb
• 1 cup granulated sugar
• 1 tablespoon cornstarch
• 1 teaspoon vanilla extract
• 1 cup rolled oats
• 1 cup all-purpose flour
• 1/2 cup brown sugar
• 1/2 cup butter, melted
• 1/2 teaspoon cinnamon

Ingredient notes: If your strawberries are very sweet, drop the granulated sugar by 2 to 3 tablespoons. For a nuttier topping, swap 1/4 cup of the oats for chopped pecans or almonds.

Step-by-step instructions

1. Preheat the oven to 350°F (175°C) and lightly grease a 9×9-inch baking dish.
2. In a large bowl, combine the sliced strawberries and rhubarb with the granulated sugar, cornstarch, and vanilla. Toss until the fruit is evenly coated, then pour the mixture into the prepared dish.
3. In a separate bowl, stir together the rolled oats, all-purpose flour, brown sugar, melted butter, and cinnamon. Use a fork or your fingers to mix until the topping becomes crumbly and holds together in small clumps.
4. Evenly sprinkle the oat mixture over the fruit so the filling is completely covered.
5. Bake for about 45 minutes, or until the topping is golden brown and the filling is visibly bubbling at the edges. If the top browns too quickly, tent loosely with foil for the last 10 to 15 minutes.
6. Remove from the oven and let the crisp cool for 10 to 15 minutes so the filling sets slightly before serving.

Best ways to enjoy it

Serve warm from the oven with a scoop of vanilla ice cream, a spoonful of whipped cream, or plain yogurt for a lighter touch. For a brunch spread, cut into squares and serve alongside a simple green salad and coffee. If you want more ideas that pair well with strawberry desserts, check out this favorite strawberry pie recipe for inspiration.

Storage and reheating tips

• Refrigerator: Store cooled leftovers in an airtight container for up to 4 days. Reheat individual portions in a microwave for 30 to 60 seconds, or warm a baking dish at 325°F (160°C) for 10 to 15 minutes until heated through.
• Freezing: You can freeze the unbaked crisp for up to 2 months. Wrap tightly with plastic wrap and foil, then bake from frozen, adding about 15 to 20 minutes to the baking time and tenting with foil if needed.
• Food safety: Cool the crisp to room temperature (no more than two hours out) before refrigerating. Reheat until steaming hot throughout before eating.

Pro chef tips

• Texture balance: For a crisper topping, use old-fashioned rolled oats rather than quick oats.
• Prevent a watery filling: Toss the fruit with cornstarch and let it sit 10 minutes before baking so the starch starts to absorb juices. If the fruit is very juicy, increase cornstarch to 1 1/2 tablespoons.
• Even browning: Press some larger clumps of topping down gently so you get a mixture of crunchy bits and tender crumbs. Rotate the pan halfway through baking for uniform color.
• Mixing butter: Melted butter makes a tender crumble; if you prefer a more biscuit-like topping, cut cold butter into the dry ingredients until pea-sized bits form.

Flavor swaps

• Fruit mixes: Substitute half the strawberries with raspberries or toss in a cup of blueberries for a different berry profile.
• Gluten-free: Replace the flour with a 1:1 gluten-free blend and use certified gluten-free oats.
• Lower sugar: Use 3/4 cup granulated sugar and add a tablespoon of lemon juice to brighten flavors if you want less sweetness.
• Nutty topping: Stir 1/3 cup chopped nuts into the oat mixture for added crunch and flavor.

Common questions

How long does it take to prepare and bake this crisp?

Total time is about 60 minutes: roughly 15 minutes to prepare and 45 minutes to bake. Cooling adds another 10 to 15 minutes if you want cleaner slices.

Can I use frozen strawberries or rhubarb?

Yes. If using frozen fruit, do not thaw first. Toss frozen fruit with the sugar and cornstarch and expect a slightly longer baking time because the filling starts colder.

Can I make this ahead of time?

You can assemble the crisp and refrigerate it, covered, for up to 24 hours before baking. If you need to keep it longer, freeze the unbaked crisp for up to 2 months and bake from frozen.

Why did my filling turn out too runny?

Most likely not enough thickener or very juicy fruit. Next time increase cornstarch to 1 1/2 tablespoons or let the fruit sit with the sugar and cornstarch for 10 to 15 minutes before baking so the juices start to thicken.

Is it safe to reheat more than once?

For food safety, only reheat the portion you plan to eat. Repeated cooling and reheating increases the risk of bacterial growth and degrades quality.

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