Getting your recipe ready...

Rhubarb and Strawberry Oat Crumble Casserole

Rhubarb and Strawberry Oat Crumble Casserole
55min Total Time
8 people Servings
Easy Difficulty
Moderate Cost
250 kcal Calories

Indulge in the delightful combination of tart rhubarb and sweet strawberries, topped with a crispy oat crumble in this irresistible casserole!


Ingredients

8
  • 2 cups rhubarb, chopped
  • 2 cups strawberries, hulled and sliced
  • 1 cup granulated sugar
  • 1 tablespoon cornstarch
  • 1 teaspoon vanilla extract
  • 1 teaspoon cinnamon
  • 1 cup rolled oats
  • 1 cup all-purpose flour
  • 1/2 cup brown sugar
  • 1/2 cup unsalted butter, melted
  • 1/4 teaspoon salt

Instructions

1

Preheat your oven to 350°F (175°C).

2

In a mixing bowl, combine the chopped rhubarb, sliced strawberries, granulated sugar, cornstarch, vanilla extract, and cinnamon. Mix well and transfer to a greased 9x13 inch casserole dish.

3

In another bowl, combine rolled oats, flour, brown sugar, melted butter, and salt. Mix until crumbly.

4

Sprinkle the oat mixture evenly over the rhubarb and strawberry layer in the casserole dish.

5

Bake in the preheated oven for 35-40 minutes or until the topping is golden brown and the fruit is bubbling.

6

Remove from the oven and let cool for a few minutes before serving.

Kitchen Tools

  • Mixing bowls
  • 9x13 inch casserole dish
  • Measuring cups and spoons
  • Spatula
  • Oven mitt

Chef's Tips

Substitute half of the sugar with maple syrup for a natural sweetener.
Add nuts or seeds to the oat crumble for extra texture.

Troubleshooting

If the crumble topping isn't browning, try broiling it for the last few minutes of cooking.
If the fruit is too tart, increase the sugar in the filling.

Recipe Variations

Add diced apples for extra sweetness.
Incorporate nuts such as pecans or walnuts into the crumble topping.

Healthy Alternatives

Use coconut oil instead of butter for a dairy-free option.
Replace all-purpose flour with whole wheat flour for added fiber.

Serving Suggestions

Serve warm with a scoop of vanilla ice cream.
Pair with a dollop of whipped cream or yogurt.

Nutrition Facts

250
Calories
3g
Protein
40g
Carbs
10g
Fat
4g
Fiber
20g
Sugar
150mg
Sodium
20mg
Cholesterol

Dietary Info

Vegetarian
Gluten-free

Garnish Ideas

Fresh mint leaves for a pop of color.
A sprinkle of cinnamon before serving.

Storage

Store leftovers in an airtight container in the fridge for up to 3 days.
Reheat in the oven for best results rather than the microwave.

Leftover Ideas

Use the crumble as a topping for yogurt or smoothies.
Mix leftover fruit with oatmeal for breakfast.

Common Mistakes to Avoid

Overcooking the fruit can make it too mushy, so keep an eye on it.
Not letting the casserole cool slightly can result in a mess when serving.

Frequently Asked Questions

Can I use frozen rhubarb and strawberries for this recipe?

Yes, you can use frozen fruit, just ensure to thaw and drain excess moisture before using.

How long can I store the casserole?

The casserole can be stored in the refrigerator for up to 3 days.

How do I know when the casserole is done baking?

It’s done when the topping is golden brown and the fruit is bubbling around the edges.

Can I make this casserole ahead of time?

You can prepare the filling and topping separately and assemble them before baking.

Is this recipe suitable for vegans?

You can make it vegan by substituting butter with coconut oil and ensuring sugar is vegan.

Reviews

Emily
Apr 8, 2026
Absolutely loved this crumble! The flavors were incredible.
James
Apr 25, 2026
Delicious but I added a bit more sugar for sweetness.
Sophia
Apr 2, 2026
Perfect for summer gatherings, will definitely make it again!
Liam
Apr 19, 2026
It was good, but I expected more from the crumble topping.
Ava
Apr 6, 2026
This was a hit at my family BBQ, everyone loved it!
Noah
Mar 27, 2026
Great balance of flavors, a little tart but refreshing.
Mia
Apr 23, 2026
I can’t believe how easy this was to make!
Oliver
Apr 4, 2026
Will definitely use this recipe again, easy and delicious.
Isabella
Apr 15, 2026
It was good but I think I overcooked the rhubarb.
Lucas
Apr 7, 2026
One of my new favorite desserts!
Charlotte
Apr 17, 2026
Loved the oats in the topping, great texture.
Alexander
Apr 25, 2026
So simple and tasty, everyone needs to try this!
Amelia
Apr 3, 2026
I added nuts and it turned out great!
Ethan
Apr 2, 2026
It was okay, but I prefer a sweeter crumble.
Harper
Apr 13, 2026
This casserole is the perfect summer treat!
Logan
Mar 31, 2026
Great recipe, will try again with other fruits.
×
Subscribe!