Why Make This Recipe
Rhubarb Crumble Squares are a delightful dessert that combines the tartness of rhubarb with a crumbly, sweet topping. This recipe is perfect for anyone looking for a simple yet delicious treat. The squares are easy to make and can be enjoyed by all ages. Whether you’re baking for a family gathering or just want a sweet snack at home, these squares will not disappoint.
How to Make Rhubarb Crumble Squares
Ingredients:
- 2 cups rhubarb, chopped
- 1 cup granulated sugar
- 1 tablespoon cornstarch
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 cup rolled oats
- 1/2 cup brown sugar
- 1/2 cup butter, melted
- 1/2 teaspoon baking powder
- 1/4 teaspoon salt
Directions:
- Preheat your oven to 350°F (175°C).
- In a bowl, mix the chopped rhubarb with granulated sugar, cornstarch, and vanilla extract. Set aside.
- In another bowl, combine the flour, rolled oats, brown sugar, baking powder, and salt.
- Pour in the melted butter and mix until crumbly.
- Take half of the oat mixture and press it into the bottom of a greased 9×9 inch baking dish.
- Spread the rhubarb mixture evenly over the crust.
- Top with the remaining oat mixture.
- Bake for about 35-40 minutes or until the top is golden brown.
- Let cool before slicing into squares.
How to Serve Rhubarb Crumble Squares
These Rhubarb Crumble Squares are best served at room temperature. You can enjoy them plain or with a scoop of vanilla ice cream or whipped cream on top. They make a great addition to any dessert table or as a sweet treat for afternoon tea.
How to Store Rhubarb Crumble Squares
To store the squares, place them in an airtight container. You can keep them in the refrigerator for up to a week. If you have leftovers, they also freeze well. Just wrap them tightly and freeze for up to three months. Thaw before serving for the best taste and texture.
Tips to Make Rhubarb Crumble Squares
- Make sure to rinse the rhubarb well and remove any leaves, as they are toxic.
- For extra flavor, consider adding a dash of cinnamon to the oat mixture.
- If you prefer a sweeter dessert, increase the sugar in the rhubarb mixture.
Variation
You can easily swap out rhubarb for other fruits. Strawberries or apples work well and can be mixed with rhubarb for a delicious twist. Adding nuts or coconut to the crumble topping can also give extra texture and flavor.
FAQs
- Can I use frozen rhubarb for this recipe? Yes, you can use frozen rhubarb. Just make sure to thaw and drain any excess moisture before using it in the recipe.
- Is there a gluten-free option for the flour? Yes, you can substitute all-purpose flour with a gluten-free flour blend to make this recipe gluten-free.
- How do I know when the squares are done baking? The squares are done when the top is golden brown and the rhubarb filling is bubbling. You can also insert a toothpick in the center to check for doneness. If it comes out clean, they are ready!

Rhubarb Crumble Squares
Ingredients
Method
- Preheat your oven to 350°F (175°C).
- In a bowl, mix the chopped rhubarb with granulated sugar, cornstarch, and vanilla extract. Set aside.
- In another bowl, combine the flour, rolled oats, brown sugar, baking powder, and salt.
- Pour in the melted butter and mix until crumbly.
- Take half of the oat mixture and press it into the bottom of a greased 9x9 inch baking dish.
- Spread the rhubarb mixture evenly over the crust.
- Top with the remaining oat mixture.
- Bake for about 35-40 minutes or until the top is golden brown.
- Let cool before slicing into squares.