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Home » Recipes » Desserts

Rhubarb Crumble Pie

Published: Mar 17, 2025 · by Emily.

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Tart, sweet, and irresistibly comforting, Rhubarb Crumble Pie is a delightful way to enjoy this uniquely tangy spring vegetable. With its tender fruit filling and buttery oat crumble topping, this pie brings a rustic charm and mouthwatering flavor to any dessert table. It’s the kind of bake that makes you feel like you're in grandma’s kitchen—warm, fragrant, and oh-so-delicious.

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I first made this pie during rhubarb season when my garden was overflowing. One slice in, and it instantly became a seasonal staple. Whether served warm with a scoop of vanilla ice cream or chilled from the fridge, it's always a crowd-pleaser.

Why You’ll Love Rhubarb Crumble Pie

  • Perfectly Balanced: Tart rhubarb meets sweet crumble.
  • No Fuss Crumble Topping: Easier than traditional pie crusts.
  • Comfort Food Classic: Homey and nostalgic.
  • Great for Spring and Summer: A lovely use for fresh garden rhubarb.
  • Make-Ahead Friendly: Keeps beautifully for several days.
  • Freezer-Friendly: Store extras for future treats.

Ingredients You’ll Need

For the Filling:

  • 4 cups rhubarb, chopped – Fresh is best; frozen can work if thawed and drained.
  • 1 cup granulated sugar – Balances rhubarb’s tartness.
  • ¼ cup cornstarch – Thickens the filling.
  • 1 teaspoon vanilla extract – Adds depth.
  • 1 tablespoon lemon juice – Brightens the flavor.

For the Crumble Topping:

  • 1 cup all-purpose flour – Forms the base of the crumble.
  • ½ cup rolled oats – Adds texture and heartiness.
  • ½ cup brown sugar – Sweet and slightly caramelized flavor.
  • ½ teaspoon cinnamon – Adds warmth.
  • ½ cup unsalted butter, melted – Brings it all together.
  • Pinch of salt – Enhances all the flavors.

Additional:

  • 1 (9-inch) unbaked pie crust – Use store-bought or your favorite homemade recipe.

Step-by-Step Instructions

Step 1: Preheat and Prep

  • Preheat your oven to 375°F (190°C).
  • Place the pie crust into a 9-inch pie dish and flute the edges if desired.

Step 2: Make the Rhubarb Filling

  • In a large bowl, combine chopped rhubarb, sugar, cornstarch, vanilla extract, and lemon juice.
  • Mix until the rhubarb is well coated.
  • Pour the filling into the prepared pie crust.

Step 3: Make the Crumble Topping

  • In a medium bowl, stir together flour, oats, brown sugar, cinnamon, and salt.
  • Add melted butter and mix until crumbly.
  • Sprinkle the topping evenly over the rhubarb filling.

Step 4: Bake

  • Place the pie on a baking sheet to catch any drips.
  • Bake for 45–55 minutes, or until the filling is bubbly and the topping is golden brown.
  • If the crust or topping begins to brown too quickly, tent loosely with foil.

Step 5: Cool and Serve

  • Let the pie cool at room temperature for at least 2 hours to set.
  • Serve warm or chilled with whipped cream or vanilla ice cream.

Serving and Storage Tips

Rhubarb crumble pie is delightful served warm on its own or with a generous scoop of vanilla ice cream. For a more indulgent twist, try it with a dollop of clotted cream or Greek yogurt.

Store leftovers covered in the fridge for up to 4 days. To reheat, warm slices in the oven at 300°F for 10–15 minutes.

To freeze, wrap the cooled pie tightly in plastic wrap and foil. Freeze for up to 3 months. Thaw overnight in the fridge and warm before serving.

Helpful Notes

  • Thickening Tip: Let the pie cool completely for the filling to fully set.
  • Crumble Variations: Add chopped nuts or coconut flakes to the topping.
  • Fruit Add-Ins: Mix in strawberries or apples for extra dimension.
  • Don’t Skip the Lemon Juice: It lifts the flavor and balances sweetness.
  • Frozen Rhubarb?: Drain well to avoid a soggy crust.

Frequently Asked Questions

1. Can I use frozen rhubarb?
Yes, just thaw and drain it first to remove excess water.

2. How do I prevent a soggy bottom crust?
Blind bake the crust for 10 minutes, or place the pie on the lower oven rack.

3. Can I use a different topping?
Absolutely. Try a lattice crust or classic double crust if you prefer.

4. Is this pie very tart?
It has a pleasant tang, but the sugar and crumble topping keep it balanced.

5. Can I make this pie gluten-free?
Yes! Use a gluten-free crust and substitute flour with a gluten-free blend.

Final Thoughts

Rhubarb Crumble Pie is a cozy, crowd-pleasing dessert that highlights the best of spring and early summer produce. With its buttery crumble topping and tart, jammy filling, it’s a rustic treat that never fails to impress.

Bake one for your next gathering or simply enjoy a slice with your afternoon tea. However you serve it, this pie is sure to warm hearts and satisfy cravings.

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Rhubarb Crumble Pie

Rhubarb Crumble Pie


  • Total Time: 1 hour 10 minutes
  • Yield: 8 slices 1x
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Ingredients

Scale

For the Filling:

  • 4 cups rhubarb (chopped)
  • 1 cup granulated sugar
  • ¼ cup cornstarch
  • 1 teaspoon vanilla extract
  • 1 tablespoon lemon juice

For the Crumble Topping:

  • 1 cup all-purpose flour
  • ½ cup rolled oats
  • ½ cup brown sugar
  • ½ teaspoon cinnamon
  • ½ cup unsalted butter (melted)
  • Pinch of salt

Additional:

  • 1 9-inch unbaked pie crust (homemade or store-bought)

Instructions

Step 1: Preheat and Prep

  1. Preheat your oven to 375°F (190°C).
  2. Place the pie crust into a 9-inch pie dish and flute the edges if desired.

Step 2: Make the Rhubarb Filling

  1. In a large bowl, combine chopped rhubarb, sugar, cornstarch, vanilla extract, and lemon juice.
  2. Mix until the rhubarb is well coated.
  3. Pour the filling into the prepared pie crust.

Step 3: Make the Crumble Topping

  1. In a medium bowl, stir together flour, oats, brown sugar, cinnamon, and salt.
  2. Add melted butter and mix until crumbly.
  3. Sprinkle the topping evenly over the rhubarb filling.

Step 4: Bake

  1. Place the pie on a baking sheet to catch any drips.
  2. Bake for 45–55 minutes, or until the filling is bubbly and the topping is golden brown.
  3. If the crust or topping begins to brown too quickly, tent loosely with foil.

Step 5: Cool and Serve

  1. Let the pie cool at room temperature for at least 2 hours to set.
  2. Serve warm or chilled with whipped cream or vanilla ice cream.

Notes

  • Thickening Tip: Let the pie cool completely for the filling to fully set.

  • Crumble Variations: Add chopped nuts or coconut flakes to the topping.

  • Fruit Add-Ins: Mix in strawberries or apples for extra dimension.

  • Don’t Skip the Lemon Juice: It lifts the flavor and balances sweetness.

  • Frozen Rhubarb?: Drain well to avoid a soggy crust.

  • Prep Time: 20 minutes

Nutrition

  • Calories: 390

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Hi, I’m Emily Parker — a professional chef, recipe developer, and the heart behind Homemade Kitchen.

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