This delightful rhubarb crunch recipe is a perfect blend of tart and sweet, making it an irresistible dessert for any occasion. The combination of tender rhubarb and a crispy, buttery topping will leave your taste buds craving more. Plus, it's completely gluten-free, so everyone can enjoy it.
If you don't usually have rhubarb in your kitchen, you might need to visit the produce section of your supermarket. Additionally, make sure to pick up gluten-free oats and gluten-free flour, which are often found in the health food or specialty diet sections.

Ingredients For Rhubarb Crunch Recipe
Rhubarb: A tart vegetable often used in desserts, providing a unique flavor and texture.
Sugar: Adds sweetness to balance the tartness of the rhubarb.
Cornstarch: Helps to thicken the rhubarb mixture as it bakes.
Gluten-free oats: Adds a chewy texture to the topping, ensuring the recipe remains gluten-free.
Brown sugar: Provides a rich, caramel-like sweetness to the topping.
Gluten-free flour: Used to create the crumbly topping while keeping the recipe gluten-free.
Butter: Adds richness and helps bind the topping ingredients together.
Technique Tip for Making Rhubarb Crunch
When preparing the rhubarb, ensure that it is chopped into uniform pieces to promote even cooking. To achieve a perfectly crumbly topping, mix the gluten-free oats, brown sugar, and gluten-free flour thoroughly before adding the melted butter. This will help distribute the butter evenly, resulting in a consistent texture.
Suggested Side Dishes
Alternative Ingredients
rhubarb - Substitute with strawberries: Strawberries provide a similar tartness and sweetness balance, making them a good alternative.
sugar - Substitute with coconut sugar: Coconut sugar has a lower glycemic index and adds a slight caramel flavor.
cornstarch - Substitute with arrowroot powder: Arrowroot powder is a gluten-free thickening agent that works similarly to cornstarch.
gluten-free oats - Substitute with quinoa flakes: Quinoa flakes are also gluten-free and provide a similar texture.
brown sugar - Substitute with maple syrup: Maple syrup adds a rich, natural sweetness and can be used in a slightly reduced quantity.
gluten-free flour - Substitute with almond flour: Almond flour is gluten-free and adds a nutty flavor and moist texture.
butter - Substitute with coconut oil: Coconut oil is a dairy-free alternative that provides a similar consistency and richness.
Other Alternative Recipes Similar to This Crunch
How to Store / Freeze This Dessert
Allow the rhubarb crunch to cool completely at room temperature. This helps prevent condensation, which can make the topping soggy.
Once cooled, transfer the rhubarb crunch to an airtight container. If you don't have a container large enough, you can cover the baking dish tightly with plastic wrap or aluminum foil.
Store the container in the refrigerator. The rhubarb crunch will keep well for up to 5 days.
For longer storage, consider freezing. Wrap the rhubarb crunch tightly in plastic wrap, then in aluminum foil to prevent freezer burn. Alternatively, you can place it in a freezer-safe container with a tight-fitting lid.
Label the container with the date to keep track of its freshness. The rhubarb crunch can be frozen for up to 3 months.
When ready to enjoy, thaw the rhubarb crunch in the refrigerator overnight. This gradual thawing helps maintain its texture.
To reheat, preheat your oven to 350°F (175°C). Place the rhubarb crunch in an oven-safe dish and cover with aluminum foil. Heat for about 15-20 minutes, or until warmed through. For a crispier topping, remove the foil during the last 5 minutes of reheating.
Alternatively, you can reheat individual servings in the microwave. Place a portion on a microwave-safe plate and heat on medium power for 1-2 minutes, checking frequently to avoid overheating.
Serve the reheated rhubarb crunch with a scoop of vanilla ice cream or a dollop of whipped cream for an extra treat.
How to Reheat Leftovers
Preheat your oven to 350°F (175°C). Place the rhubarb crunch in an oven-safe dish and cover it with aluminum foil. Bake for about 15-20 minutes or until it is heated through and the topping is crispy again.
For a quicker method, use a microwave. Place a portion of the rhubarb crunch in a microwave-safe dish. Heat on medium power for 1-2 minutes, checking frequently to ensure it heats evenly. Be cautious, as the topping may not remain as crispy.
If you have an air fryer, preheat it to 350°F (175°C). Place the rhubarb crunch in an air fryer-safe dish and heat for about 5-7 minutes. This method helps retain the crunchiness of the topping.
For stovetop reheating, use a non-stick skillet over medium-low heat. Add the rhubarb crunch and cover with a lid. Heat for about 5-7 minutes, stirring occasionally to ensure even warming. This method can help maintain the texture of the rhubarb and the crispiness of the topping.
Best Tools for Making This Crunchy Delight
Oven: Used to bake the rhubarb crunch at 350°F (175°C) until the topping is golden brown and the rhubarb is tender.
Mixing bowl: Needed to combine the rhubarb, sugar, and cornstarch, as well as to mix the oats, brown sugar, and gluten-free flour.
Baking dish: Used to spread the rhubarb mixture evenly and to hold the entire dessert while it bakes.
Measuring cups: Essential for accurately measuring the rhubarb, sugar, oats, brown sugar, and gluten-free flour.
Measuring spoons: Needed to measure the cornstarch accurately.
Spatula: Useful for mixing the ingredients together and spreading the mixture evenly in the baking dish.
Knife: Required to chop the rhubarb into small pieces.
Cutting board: Provides a safe surface to chop the rhubarb.
Microwave-safe bowl: Can be used to melt the butter if you prefer to use a microwave.
Oven mitts: Necessary for safely handling the hot baking dish when removing it from the oven.
Cooling rack: Allows the rhubarb crunch to cool slightly before serving.
How to Save Time on Making Rhubarb Crunch
Prepare the rhubarb ahead: Chop and store rhubarb in the fridge a day before to save time on prep.
Use pre-mixed flour: Opt for a gluten-free flour blend to avoid measuring multiple ingredients.
Melt butter in microwave: Quickly melt butter in the microwave instead of on the stove.
Mix dry ingredients in bulk: Combine oats, brown sugar, and gluten-free flour in advance and store in an airtight container.
Use a food processor: Speed up chopping rhubarb by using a food processor.

Rhubarb Crunch Recipe
Ingredients
Main Ingredients
- 4 cups rhubarb, chopped
- 1 cup sugar
- 3 tablespoons cornstarch
Topping
- 1 cup gluten-free oats
- 1 cup brown sugar
- 1 cup gluten-free flour
- ½ cup butter, melted
Instructions
- Preheat oven to 350°F (175°C).
- In a mixing bowl, combine rhubarb, sugar, and cornstarch. Mix well and spread evenly in a baking dish.
- In another bowl, mix oats, brown sugar, and gluten-free flour. Stir in melted butter until crumbly. Sprinkle over the rhubarb mixture.
- Bake for 45 minutes or until the topping is golden brown and the rhubarb is tender.
- Let it cool slightly before serving.
Nutritional Value
Keywords
Suggested Appetizers and Main Courses for This Recipe
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