OMG DON’T LOSE THIS 😱 This Blueberry Rhubarb Crisp is the ultimate summer dessert combo! It’s sweet, tangy, and topped with a golden, buttery oat crumble. Whether you use fresh or frozen fruit, the result is a bubbling, juicy filling beneath a perfectly crisp topping. Serve it warm with vanilla ice cream or whipped cream for pure bliss.
💜 Why You’ll Love This Blueberry Rhubarb Crisp
Easy to make with basic pantry ingredients
Balanced flavor—sweet blueberries + tart rhubarb
Perfectly crisp oat topping
Customizable with fresh or frozen fruit
Great for gatherings, holidays, or simple family nights
📝 Ingredients You’ll Need
For the Filling:
3 cups chopped fresh or frozen rhubarb
2 cups fresh or frozen blueberries
3/4 cup granulated sugar
2 tbsp cornstarch
1 tbsp lemon juice
1 tsp vanilla extract
Pinch of salt
For the Crisp Topping:
1 cup old-fashioned rolled oats
1/2 cup all-purpose flour
1/2 cup packed light brown sugar
1/2 cup unsalted butter, cold and cubed
1 tsp cinnamon
Pinch of salt
🧑🍳 How to Make Blueberry Rhubarb Crisp
Preheat & Prepare Filling
Preheat your oven to 350°F (175°C). In a large bowl, toss the chopped rhubarb and blueberries with sugar, cornstarch, lemon juice, vanilla, and salt. Stir until the fruit is well coated, then pour the mixture into a greased 8×8-inch baking dish.
Make the Crisp Topping
In another bowl, combine the oats, flour, brown sugar, cinnamon, and a pinch of salt. Add in the cold, cubed butter. Use your fingers or a pastry cutter to blend the butter into the mixture until it forms coarse, crumbly clumps.
Assemble & Bake
Sprinkle the crisp topping evenly over the fruit mixture in the baking dish. Bake uncovered for 40 to 45 minutes, or until the topping is golden and the filling is bubbling at the edges.
Cool & Serve
Let the crisp cool for at least 15 minutes before serving to allow the filling to thicken slightly. Enjoy it warm on its own or elevate it with a scoop of vanilla ice cream or a dollop of whipped cream.
⏱ Prep & Cook Time
Prep Time: 15 minutes
Cook Time: 45 minutes
Total Time: 1 hour
🌟 Tips for the Perfect Crisp
Use cold butter for a crispier topping
Let the crisp rest before serving—it helps the filling set
Add a sprinkle of chopped nuts to the topping for extra crunch
Make ahead and reheat for easy entertaining
💬 Final Thoughts
This Blueberry Rhubarb Crisp is a crowd-pleasing dessert that never disappoints. The sweet-tart fruit filling pairs perfectly with the crunchy, cinnamon-kissed topping. Whether you’re using fresh produce or what’s in your freezer, this easy recipe will quickly become a go-to favorite.