Rhubarb Crisp: An Irresistible Comfort Dessert Recipe With Frozen Rhubarb

Why You’ll Love This Recipe

If you’ve ever wondered what to do with that bag of frozen rhubarb sitting in your freezer, this recipe is your answer. This rhubarb crisp is the kind of dessert that feels both special and effortless. It comes together with simple ingredients you probably already have on hand, and the sweet tart filling paired with a crunchy oat topping never fails to impress.

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Here’s why this recipe earns a permanent spot in my dessert rotation:

• Easy to make: No complicated techniques. Just mix, layer, and bake.
• Versatile serving options: Enjoy it plain, with whipped cream, or a scoop of vanilla ice cream.
• Crowd pleasing flavor: The balance of tart rhubarb and sweet brown sugar topping appeals to all ages.
• Great for using frozen rhubarb: Frozen works beautifully, so you can enjoy spring flavor any time.
• Customizable: Add strawberries, apples, or a handful of nuts to make it your own.

Ingredients

The ingredient list is short and pantry friendly. You’ll need two simple components: the filling and the oat topping.

For the Filling

• 4 cups (500g) rhubarb, cut into 1/2 inch chunks (fresh or frozen)
• 3/4 cup (150g) granulated sugar
• 1/4 cup (30g) all purpose flour
• 1 tsp ground cinnamon

For the Topping

• 1 cup (125g) all purpose flour
• 1/2 cup (45g) rolled oats
• 1/2 cup (100g) packed brown sugar
• 1/2 cup (114g) unsalted butter, melted

How to Make Best Rhubarb Crisp

Follow these easy steps for a perfectly baked crisp with a golden, crunchy topping.

Step 1: Preheat the Oven

Preheat your oven to 350°F (175°C). This ensures even baking from the start.

Step 2: Prepare the Filling

In a large bowl, toss the rhubarb with granulated sugar, flour, and cinnamon until every piece is well coated. Transfer the mixture to an 8×8 inch baking dish (glass or ceramic works well for even heat distribution).

Step 3: Prepare the Topping

In a separate bowl, mix the flour, rolled oats, and brown sugar. Pour in the melted butter and stir until the mixture is moistened and clumpy. Use your hands to break it into bite sized crumbles, then sprinkle evenly over the rhubarb filling. Avoid overmixing; you want a light, crumbly texture.

Step 4: Bake Your Crisp

Place the dish in the preheated oven and bake for 40 to 45 minutes. You’ll know it’s ready when the topping is deep golden brown and the filling bubbles around the edges. If you used frozen rhubarb straight from the freezer, you may need an extra 5 to 10 minutes of baking time.

Step 5: Serve It Up!

Let the crisp cool for at least 10 to 15 minutes. This allows the filling to set so it doesn’t turn runny. Serve it warm or at room temperature, with a dollop of sweetened whipped cream or a scoop of vanilla ice cream on the side.

How to Serve Best Rhubarb Crisp

This crisp is wonderful on its own, but a few simple additions can take it to the next level.

Here are some of my favorite ways to serve it:

With Whipped Cream

A dollop of sweetened whipped cream adds a light, airy texture that balances the richness of the crisp. It’s a classic choice that never fails.

Over Ice Cream

Vanilla ice cream is the ultimate companion. The warm, tart filling and cold, creamy ice cream create a magical contrast.

As a Breakfast Treat

Yes, breakfast! Serve leftover crisp warm with a spoonful of Greek yogurt. The tangy yogurt complements the sweet oat topping beautifully.

With Fresh Berries

Top each serving with fresh strawberries or blueberries. The extra burst of fruit adds color and freshness that brightens the whole dish.

Drizzled with Caramel Sauce

For a truly decadent dessert, drizzle warm caramel sauce over the crisp. The buttery sweetness pairs perfectly with the tart rhubarb.

Paired with Tea or Coffee

Enjoy a slice alongside a hot cup of tea or coffee. The slight bitterness of the drink balances the dessert’s sweetness, making it an ideal afternoon pick me up.

How to Perfect Best Rhubarb Crisp

Want to nail this recipe every single time? Keep these tips in mind:

• Choose the right rhubarb: Look for firm, brightly colored stalks. Avoid any that are limp or have blemishes. Remember, only the stalks are edible; discard the leaves as they are toxic.
• Measure accurately: Too much flour in the filling can make it pasty, while too little sugar leaves it overly tart. Use measuring cups or a kitchen scale for best results.
• Don’t skip the cinnamon: A teaspoon of cinnamon adds warmth and depth that elevates the flavor of the rhubarb.
• Let it cool: Patience is key. Cooling for 10 to 15 minutes allows the filling to set, so each serving holds its shape.
• Experiment with add ins: Fold in a handful of chopped pecans or walnuts to the topping for extra crunch. A splash of vanilla extract or lemon juice in the filling brightens the flavor beautifully.

Best Side Dishes for Best Rhubarb Crisp

While this crisp is fabulous on its own, pairing it with the right side can make it a true showstopper. Here are some ideas:

Common Mistakes to Avoid

Even simple desserts can go wrong if you overlook a few details. Here are the most common pitfalls and how to steer clear of them:

• Inaccurate measurements: Using too much or too little flour or sugar can ruin the texture. Use a kitchen scale or proper measuring cups.
• Overcooking or undercooking: Keep an eye on the oven. The crisp is done when the topping is golden and the filling bubbles at the edges. Check at 40 minutes and go from there.
• Using old or spoiled rhubarb: Fresh rhubarb should be firm and brightly colored. If it’s limp or has soft spots, the flavor and texture will suffer.
• Skipping cinnamon: That teaspoon of cinnamon adds essential warmth and depth. Don’t leave it out.
• Skipping the cooling step: Serving the crisp straight from the oven leads to a runny mess. Let it rest for at least 10 to 15 minutes.

Storage & Reheating Instructions

This crisp keeps well, so you can enjoy it for days, if it lasts that long!

Refrigerator Storage

Store leftovers in an airtight container in the refrigerator for up to 3 to 4 days. The topping will soften slightly, but the flavor remains great.

Freezing Best Rhubarb Crisp

To freeze, wrap the cooled crisp tightly in plastic wrap, then again in aluminum foil. It will keep well for up to 3 months. Thaw overnight in the fridge before reheating.

Reheating Best Rhubarb Crisp

For the best results, reheat in a 350°F oven for 15 to 20 minutes until warm. In a pinch, use the microwave in 30 second bursts. You can also reheat portions in a skillet over low heat, stirring occasionally.

Frequently Asked Questions

Final Thoughts

This rhubarb crisp is one of those desserts that feels like a warm hug in a bowl. The combination of tart, tender rhubarb and sweet, buttery oat topping is simply irresistible. It’s versatile enough for weeknight cravings and special enough for company.

I hope you give this recipe a try, whether you’re using fresh spring rhubarb or a bag from the freezer. And if you love this style of dessert, be sure to check out my Golden Rhubarb Crumble Muffins and Traditional Rhubarb Crisp for more rhubarb inspiration.

For more trusted recipes, you can also explore this simple rhubarb crisp dessert or this quick rhubarb crisp dessert. Happy baking!

Rhubarb Crisp

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🍓 A warm, comforting dessert with the perfect balance of sweet and tart flavors in every bite.
🥣 Simple pantry ingredients come together effortlessly for a golden, crunchy-topped crisp anyone can make.

• Total Time: 1 hour
• Yield: 6 servings 1x

Ingredients

Scale 1x2x3x

4 cups (500g) rhubarb, cut into 1/2 inch chunks (fresh or frozen)

3/4 cup (150g) granulated sugar

1/4 cup (30g) all purpose flour

1 tsp ground cinnamon

1 cup (125g) all purpose flour

1/2 cup (45g) rolled oats

1/2 cup (100g) packed brown sugar

1/2 cup (114g) unsalted butter, melted

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Instructions

1-Preheat the oven: Preheat oven to 350°F (175°C) for even baking.

2-Prepare the filling: Toss rhubarb with granulated sugar, flour, and cinnamon; transfer to an 8×8 inch baking dish.

3-Prepare the topping: Mix flour, oats, brown sugar, and melted butter until clumpy; sprinkle crumbles over filling.

4-Bake the crisp: Bake at 350°F for 40-45 minutes until topping is golden and filling bubbles. Add 5-10 minutes if using frozen rhubarb.

5-Serve: Let cool 10-15 minutes to set. Serve warm with whipped cream or ice cream.

Last Step:

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Notes

🌿 Choose firm, brightly colored rhubarb stalks and always discard the leaves, as they are toxic.
⏳ Let the crisp cool for 10 to 15 minutes after baking so the filling sets and isn’t runny.
🥜 Add a handful of chopped pecans or walnuts to the topping for extra crunch and texture.

• Author: Ruby Bennett
• Prep Time: 15 minutes
• Cooling Time: 15 minutes
• Cook Time: 45 minutes
• Category: Dessert
• Method: Baking
• Cuisine: American
• Diet: Vegetarian

Nutrition

• Serving Size: 1 serving
• Calories: 350
• Sugar: 35g
• Sodium: 10mg
• Fat: 16g
• Saturated Fat: 10g
• Unsaturated Fat: 5g
• Trans Fat: 0g
• Carbohydrates: 52g
• Fiber: 3g
• Protein: 4g
• Cholesterol: 40mg