Strawberry Rhubarb Crisp

Fast, Reliable, and Full of Flavor

This strawberry rhubarb crisp is a total winner—fast to put together, super reliable, and bursting with bright, summery flavors. It’s perfect when rhubarb is fresh and in season or when you want a last-minute dessert that’s sure to please. Here’s why you’ll want to make it:

• From start to finish, it takes about 45 minutes.
• Most ingredients are pantry staples like oats, flour, butter, and brown sugar, plus fresh or frozen fruit.
• The sweet strawberries balance out the rhubarb’s tartness so you don’t need a ton of sugar.
• A golden, crunchy oat topping gives a lovely contrast to the soft, jammy fruit below.
• Super flexible—you can easily make it gluten-free, vegan, or swap the fruit to what you have on hand.
• It freezes and reheats beautifully, making it perfect for prepping ahead or saving for a sweet craving later.

Essential Ingredients to Gather

• 4 cups chopped rhubarb
• 2 cups halved strawberries
• ½ cup sugar
• 2 Tbsp cornstarch
• 1 Tbsp lemon juice
• 1 tsp vanilla extract
• ½ cup cold unsalted butter*, can use a vegan butter
• ¾ cup rolled oats
• ¾ cup all-purpose flour, can use a gluten-free flour blend
• ¾ cup brown sugar
• ⅛ tsp salt
• Optional: 1 tsp cinnamon, ¼ tsp ground cloves

How to Make the Crisp

1. Preheat oven to 375°F (190°C) and lightly grease a 9×13-inch (or similar) baking dish.
2. If using frozen rhubarb (or frozen strawberries), thaw and drain it well so the filling won’t be watery.
3. In a large bowl, whisk together 4 cups chopped rhubarb, 2 cups halved strawberries, ½ cup sugar, 2 tablespoons cornstarch, 1 tablespoon lemon juice, and 1 teaspoon vanilla extract.

4. Pour the fruit mixture into the prepared dish and spread it out evenly.

   

5. Cut ½ cup cold unsalted butter into small cubes; in a separate bowl stir together ¾ cup rolled oats, ¾ cup all-purpose (or gluten-free) flour, ¾ cup brown sugar, and ⅛ tsp salt (omit if butter is salted).
6. Add the cubed butter to the dry topping and use a pastry cutter, two forks, or your fingers to pinch/blend until the mixture is crumbly with pea-sized bits.
7. Scatter the topping evenly over the fruit filling so it’s well covered.

8. Bake on the middle rack for 30–45 minutes, until the topping is golden brown and the filling is bubbling.

   

9. Let the crisp cool for 10–15 minutes to set before serving.

   

Pro Tips for a Perfect Crisp

You might hear “crumble” and “crisp” tossed around like they’re the same dessert. But there’s a little difference to know:

Crumble usually means a fruit base with a crumbly topping made from flour, butter, and sugar. The topping looks a bit like coarse breadcrumbs and turns crisp and crumbly when baked. It usually doesn’t have oats or nuts—think of a Classic Apple Crumble as the template.

Crisp is similar but includes oats, nuts, or both in the topping. This gives the dessert an extra crunchy texture and a little more depth to each bite.

Just a quick note: “crumble” and “crisp” desserts sound similar but have a small difference you’ll want to keep in mind when making this treat.

Crumble means a fruit filling topped with a buttery mix of flour and sugar that bakes into a crumbly, breadcrumb-like texture without oats or nuts.

Crisp ups the crunch factor by adding oats, nuts, or both to the topping, giving it a wonderful textured bite that pairs perfectly with the soft fruit beneath.

Flavor Swaps and Add-Ins

• Fruit swaps: Feel free to swap out strawberries for raspberries, blackberries, blueberries, or diced apples. If you’re using mixed berries, reduce the sugar a bit if the fruit is very sweet.
• Less sugar: Cut the sugar in the filling by half or to taste, depending on how sweet your berries are.
• Add nuts: Stir in ½ cup chopped walnuts, pecans, or sliced almonds into the topping for some extra crunch and depth.
• Spices: Try adding 1 teaspoon cinnamon, or the recipe’s optional 1 tsp cinnamon plus ¼ tsp cloves to the topping or filling for a warm, cozy flavor boost.
• Gluten-free: Use a 1:1 gluten-free flour blend and certified gluten-free rolled oats to keep this safe for gluten-free eaters.
• Vegan: Swap in firm, cold vegan butter for the topping and use coconut sugar instead of brown sugar if you like.

Storing and Make-Ahead Tips

Refrigerator: Once cool, store leftover crisp in an airtight container in the fridge for up to 3–4 days. You can eat it cold or warm individual servings in the microwave or heat the whole dish at 350°F (175°C) for 10–15 minutes to bring it back to life.

Freezer: This crisp freezes well for up to 3 months. After baking, cool completely, then wrap tightly or place in an airtight container. Thaw overnight in the fridge, then reheat at 350°F for 15–25 minutes. These freezer-friendly steps also work for fruit cobblers like Easy Peach Cobbler with Canned Peaches.

Freeze unbaked: You can assemble the whole crisp in a freezer-safe dish, wrap it well, and freeze for up to 2 months. When baking from frozen, add 15–25 minutes to the bake time and cover loosely with foil for the first part if the topping starts browning too fast.

Make-ahead: You can prep the filling and topping separately in the fridge for 1–2 days, then assemble and bake when ready. Or assemble the whole dish up to 24 hours ahead and refrigerate before baking. That assemble-then-bake approach also suits breakfast bakes like Blueberry Buttermilk Pancake Casserole.

Common Questions Answered

• Q: Can I use frozen rhubarb? A: Absolutely! Just thaw and drain it well first so the filling doesn’t get watery. Same goes for frozen strawberries. If you have extra rhubarb to use up, try these Rhubarb Dream Bars.
• Q: What can I use if I don’t have cornstarch? A: You can use 2–3 tablespoons of all-purpose flour, but cornstarch gives a clearer, smoother filling and keeps things less cloudy.
• Q: Why choose old-fashioned rolled oats over quick oats? A: Rolled oats hold their texture better and add a nice chewy crunch. Quick oats tend to soften up too much and lose that perfect bite.
• Q: How do I avoid a soggy topping? A: Use cold butter and cut it into your dry ingredients without over-mixing. Drain any extra juice from frozen fruit and make sure the filling is properly thickened with cornstarch or flour.
• Q: Can I halve or double this recipe? A: Yes! Halve it for smaller batches or double it for bigger crowds. Just watch the baking time—it might change slightly. Bake until the topping is golden and the filling bubbles.
• Q: Is this recipe gluten-free or vegan-friendly? A: You bet. Use a gluten-free 1:1 flour blend and certified gluten-free oats if you need gluten-free. For vegan, swap in firm, cold vegan butter.