Easy Rhubarb Custard Pie Recipe
Introduction
This easy rhubarb custard pie features a sweet, creamy custard filling that perfectly balances the tartness of fresh rhubarb. Baked in a flaky pie crust, it makes a comforting springtime dessert that’s delicious served with vanilla ice cream or whipped cream.

Ingredients
- 4 1/2 cups rhubarb, cut into 1/2-inch pieces
- 2 1/4 cups sugar
- 1/3 cup all-purpose flour
- 3 tablespoons butter, melted and cooled
- 1/2 teaspoon salt
- 1 teaspoon vanilla extract
- 3 eggs, beaten until light and frothy
- 1 9-inch pie shell (store-bought or homemade)
Instructions
- Step 1: In a bowl, combine the rhubarb with 3/4 cup sugar and let it sit for 30 to 45 minutes. This draws out excess moisture, preventing a watery custard. Meanwhile, preheat your oven to 400°F and place the pie shell on a baking sheet for even heat distribution.
- Step 2: Drain the rhubarb thoroughly using a fine-mesh strainer. In a separate bowl, whisk together the remaining 1 1/2 cups sugar, flour, and salt. In another bowl, beat the eggs until frothy, then stir in the melted butter and vanilla extract until combined.
- Step 3: Fold the egg mixture into the dry ingredients until just combined—avoid overmixing. Gently fold in the drained rhubarb, taking care not to break the pieces. Pour the filling evenly into the pie shell.
- Step 4: Bake at 400°F for 15 minutes to set the crust and start cooking the filling. Then reduce oven temperature to 325°F and bake for an additional 45 to 60 minutes, until the custard is mostly set but still has a slight jiggle in the center.
- Step 5: Remove the pie from the oven and cool on a wire rack for 1 to 2 hours. Refrigerate for at least 4 hours or overnight to allow the custard to fully set and slice cleanly. Serve chilled or at room temperature.
Tips & Variations
- If fresh rhubarb isn’t available, use frozen rhubarb that is fully thawed and well-drained before baking.
- Mix in 1 cup sliced strawberries with the rhubarb to reduce tartness, and reduce sugar to 1 1/2 cups if preferred.
- You can use a mix of white and brown sugar for a deeper flavor.
- Butter gives the best flavor but margarine or coconut oil can be substituted.
- If short one egg, use 2 eggs plus 1/4 cup milk or cream as a substitute for the custard.
- Place the pie shell on a baking sheet before baking to catch any drips and make transferring easier.
Storage
Store the pie covered loosely in the refrigerator for 3 to 4 days. The custard filling stays creamy and tastes best chilled. You can freeze the pie for up to 2 months by wrapping tightly in plastic wrap and foil. Thaw overnight in the fridge before serving. Serve cold or at room temperature for best texture.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use frozen rhubarb instead of fresh?
Yes, frozen rhubarb works fine if thawed completely and drained well to remove excess liquid. This helps prevent a watery custard.
How do I know when the custard pie is done baking?
The custard should be mostly set but still have a slight jiggle in the center when you gently shake the pan. It will continue to set as it cools, so avoid overbaking for a creamy texture.
PrintEasy Rhubarb Custard Pie Recipe
This Easy Rhubarb Custard Pie features a perfect balance of tart rhubarb and sweet, creamy custard baked in a flaky pie crust. With simple pantry ingredients and a two-stage bake, this springtime dessert is a comforting classic that impresses effortlessly. Enjoy the smooth custard softening tangy rhubarb for a lightly sweetened pie best served chilled, making it ideal for a nostalgic homemade treat.
- Prep Time: 45 minutes
- Cook Time: 60 minutes
- Total Time: 1 hour 45 minutes
- Yield: 8 slices 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
For the Filling
- 4 1/2 cups rhubarb, cut into 1/2-inch pieces
- 2 1/4 cups sugar (divided: 3/4 cup + 1 1/2 cups)
- 1/3 cup all-purpose flour
- 3 tbsp butter, melted and cooled to room temperature
- 1/2 tsp salt
- 1 teaspoon vanilla extract
- 3 eggs, beaten until light and frothy
For the Base
- 1 9-inch pie shell (store-bought or homemade flaky crust, Pillsbury refrigerated crust recommended)
Instructions
- Prepare the Rhubarb and Preheat the Oven: In a bowl, combine the rhubarb pieces with 3/4 cup sugar and let it sit for 30-45 minutes to draw out excess moisture, which prevents a watery custard. Meanwhile, preheat your oven to 400°F and place the pie shell on a baking sheet to ensure even heat and easier handling.
- Drain Rhubarb and Prepare Custard Base: Thoroughly drain the rhubarb liquid using a fine-mesh strainer to avoid a runny filling. In a separate bowl, whisk together the remaining 1 1/2 cups sugar, flour, and salt. In another bowl, beat the eggs until light and frothy, then add the melted butter and vanilla extract, mixing well for even flavor distribution.
- Combine Custard Mixture and Fill Pie Shell: Fold the wet egg mixture into the dry flour mixture gently to avoid overmixing. Then carefully fold in the drained rhubarb pieces without breaking them. Pour the filling evenly into the prepared pie shell.
- Bake the Pie: Bake at 400°F for 15 minutes to set the bottom crust and start cooking the filling. Then reduce oven temperature to 325°F and bake for an additional 45-60 minutes until the custard is set but still slightly jiggly in the center when gently shaken. This two-temperature baking prevents crust burning while fully cooking the custard.
- Cool and Chill: Remove the pie from the oven and let it cool on a wire rack at room temperature for 1-2 hours. Then refrigerate for at least 4 hours or overnight to allow the custard to fully set and develop flavor. Serve chilled or at room temperature for clean slicing and optimal taste.
Notes
- Always drain the rhubarb after macerating to prevent a watery custard.
- Place the pie shell on a baking sheet to avoid oven spills and for easier handling.
- Do not overbake; the custard should still jiggle slightly when done as it firms up during cooling.
- Allow the pie to chill fully before slicing for clean cuts.
- Substitute margarine or coconut oil for butter if necessary, but butter provides the best flavor.
- If short one egg, use 2 eggs plus 1/4 cup milk or cream instead.
- Frozen rhubarb can be used if thawed and drained thoroughly, or add sliced strawberries to reduce tartness.
- For added flavor, a lattice or double-crust pie shell can replace the single crust.
Keywords: Rhubarb custard pie, spring dessert, homemade pie, custard pie, rhubarb recipe, easy pie, classic dessert

