If you’re looking for a dessert that beautifully balances tart and sweet with a silky smooth texture, this Rhubarb Custard Pie Recipe is going to be your new favorite. I absolutely love how the custard sets around the tangy rhubarb, giving every bite a luscious creamy finish with just the right amount of brightness. It’s the sort of pie that feels both nostalgic and fresh, perfect for spring or early summer when rhubarb is at its best.

When I first tried this recipe, I was amazed by how easy it was to pull off a custard pie that wasn’t overly sweet or heavy. You’ll find that the method of macerating the rhubarb first really makes a difference in texture and flavor, and the slow bake ensures a custard that’s silky but not wet. Whether you’re celebrating a special occasion or just craving a cozy homemade dessert, this Rhubarb Custard Pie Recipe delivers every single time.

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Why You’ll Love This Recipe

  • Perfect Flavor Balance: The tartness of rhubarb contrasts with the sweet, creamy custard for an irresistible taste.
  • Simple Technique: Macerating the rhubarb ahead creates a tender texture without making the custard watery.
  • Crowd-Pleaser: My family goes crazy for this pie, making it a classic dessert for gatherings and holidays.
  • Versatile and Seasonal: Easy to adapt with frozen rhubarb or tweak sweetness depending on how tart your stalks are.

Ingredients You’ll Need

Choosing the right ingredients is key to making a Rhubarb Custard Pie Recipe that’s delicious and has the perfect texture. Fresh rhubarb adds a pleasant tartness, and pairing it with simple pantry staples creates that classic custard flavor you’ll adore.

  • Rhubarb: Use firm, bright red stalks when possible; they have the best flavor and less bitterness.
  • Granulated sugar: Divided to balance tartness; adjust slightly if your rhubarb is very sour.
  • All-purpose flour: Helps thicken the filling for a custard that holds nicely without being cakey.
  • Unsalted butter: Cold and cubed to incorporate richness and a lovely texture to the custard.
  • Fine-grain salt: Balances and enhances all the sweet and tart flavors.
  • Large eggs: Beaten; eggs set the custard and give the pie its creamy structure.
  • Unbaked deep-dish pie shell: Deep sides hold the custard and rhubarb perfectly—homemade or store-bought works great.
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Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

Variations

I like to mix things up a bit depending on the season or who I’m serving this pie to. This Rhubarb Custard Pie Recipe is super versatile, so don’t hesitate to customize it to fit your taste buds or dietary needs.

  • Adding Berries: I sometimes throw in a handful of fresh strawberries or raspberries to boost the fruity flavors—they pair deliciously with rhubarb.
  • Using Frozen Rhubarb: Whenever fresh rhubarb is out of season, frozen works well; just thaw and drain excess liquid before using.
  • Gluten-Free Option: Swap the all-purpose flour for a gluten-free blend to keep the texture while making it safe for those with sensitivities.
  • Less Sweet Version: If you prefer less sugar, reduce the granulated sugar by 1/4 cup—you’ll still get a rich custard but a more pronounced tart bite.

How to Make Rhubarb Custard Pie Recipe

Step 1: Macerate the Rhubarb

Start by combining the sliced rhubarb with part of the sugar in a bowl—about three-quarters of a cup. Let it sit for 30 to 45 minutes, stirring occasionally. This step draws out the natural juices, softening the rhubarb and mellowing its tartness. When you see a pool of liquid at the bottom, pour it off carefully—feel free to save this flavorful juice for cocktails or desserts; it’s surprisingly tasty!

Step 2: Prep Your Oven and Pie Shell

While the rhubarb macerates, preheat your oven to 400°F. Place your deep-dish pie shell on a baking sheet—it makes transferring in and out of the oven much easier and catches any potential drips. Having everything ready now saves you stress when the filling is mixed up.

Step 3: Mix the Custard Filling

In a large bowl, whisk together the remaining sugar, flour, and salt. Next, cut in the cold cubed butter using a pastry cutter or fork until it’s evenly broken up and coated with the dry ingredients. Stir in the beaten eggs until smooth, then fold in the drained rhubarb. Your filling is now ready—notice how the butter bits add richness and help the custard set beautifully.

Step 4: Bake the Pie

Pour the rhubarb custard mixture into your prepared pie shell on the baking sheet. Bake at 400°F for 15 minutes to set the top slightly, then reduce the oven temperature to 325°F without opening the door. Continue baking for another 45 to 60 minutes until the center has a slight wobble—this wobble means the custard is perfectly set but still creamy. Avoid overbaking, or the custard will dry out.

Step 5: Cool and Chill

Remove the pie from the oven and let it cool on a rack until it reaches room temperature—this helps the custard finish setting. Then cover it with foil and place it in the fridge to chill before serving. I always find this chilling step enhances the texture and makes slicing so much easier, especially if you’re serving it later.

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Pro Tips for Making Rhubarb Custard Pie Recipe

  • Don’t Skip Macerating: It really tames the rhubarb’s tartness and prevents a watery filling.
  • Use a Deep-Dish Pie Plate: The filling is generous, and you want room for the custard to set properly.
  • Keep the Oven Door Closed: When lowering the temperature, resist the urge to peek so the custard cooks evenly.
  • Let It Chill Before Slicing: Cutting the pie cold helps the custard hold together beautifully on the plate.

How to Serve Rhubarb Custard Pie Recipe

The image shows a slice of pie on a white square plate with a silver fork beside it. The pie slice has three layers: a golden brown flaky crust on the bottom and edges, a thick middle layer with soft pink and green chunks filling, and a lightly browned crumbly top layer with small pieces matching the filling colors. Behind the slice, the remaining pie sits on a round white plate, which rests on a red serving tray. The whole setup is on a white marbled surface, with a blurred white tiled background. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

I usually top each slice with a dollop of lightly sweetened whipped cream—it’s the perfect cool, airy contrast to the dense custard. Fresh mint leaves or a dusting of powdered sugar also add a pretty, fresh touch that makes this pie feel extra special.

Side Dishes

Serve it alongside a scoop of vanilla bean ice cream or a simple cup of black coffee to balance the richness. I’ve also enjoyed this pie with a fresh berry salad on the side, making for a light summer dessert spread.

Creative Ways to Present

For special occasions, I like to arrange individual mini custard pies in tartlet pans, which makes cute single servings. Another trick is to glaze the top of the pie with a little warmed jam to give it a shiny, appealing finish that also adds a subtle sweetness.

Make Ahead and Storage

Storing Leftovers

I store leftover rhubarb custard pie covered with foil in the refrigerator—it keeps well for up to 3 days. I’ve found the custard texture actually firms up nicely after a day, so leftovers are often tastier than fresh from the oven.

Freezing

If you want to freeze the pie, wrap it tightly in plastic wrap and then in foil. Freeze for up to 2 months. When ready to eat, thaw overnight in the fridge for the best texture. I usually warm it slightly in a low oven before serving to freshen it up.

Reheating

To reheat, I place individual slices in a 300°F oven for about 10 minutes or until warmed through. Avoid microwaving because it can make the custard rubbery—slow gentle heat keeps that creamy texture intact.

FAQs

  1. Can I use frozen rhubarb in this Rhubarb Custard Pie Recipe?

    Yes! Frozen rhubarb works well when fresh is out of season. Just make sure to thaw it completely and drain off any excess liquid before combining it with sugar and other ingredients, as too much moisture can affect the custard setting.

  2. How do I know when the custard is fully baked?

    The center of the pie should have a slight wobble when you gently shake it—that means it’s set but still creamy. Avoid baking until completely firm to prevent a dry or curdled texture.

  3. Can I make this pie ahead of time?

    Absolutely! The pie actually benefits from chilling for a few hours or overnight, which helps the custard firm up and makes slicing easier. Just keep it tightly covered in the fridge until ready to serve.

  4. What should I do with the extra rhubarb juice?

    I like saving the juice to either sweeten it for a refreshing rhubarb syrup, add to cocktails, or drizzle over ice cream. It’s a great way to reduce waste and add an extra burst of rhubarb flavor to other treats.

Final Thoughts

This Rhubarb Custard Pie Recipe holds a special place in my heart—it’s a dessert that never fails to feel like a warm hug after dinner. The balance of creamy custard and tart rhubarb is just so comforting and unique, and once you master the simple steps here, you’ll find yourself reaching for this pie whenever rhubarb is in season. I can’t recommend it enough—give it a try and watch it become a family favorite in your home too!

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Rhubarb Custard Pie Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.5 from 135 reviews
  • Author: Jaden
  • Prep Time: 40 minutes
  • Cook Time: 1 hour
  • Total Time: 1 hour 40 minutes
  • Yield: 8 servings
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Description

This classic Rhubarb Custard Pie features a tender deep-dish crust filled with a tangy, sweet rhubarb custard. The rhubarb is macerated with sugar to release its juices, then combined with a rich custard base and baked to a perfect, slightly wobbly set. Chilled before serving, it offers a delightful balance of tartness and creamy sweetness perfect for spring and summer desserts.


Ingredients

Units Scale

Pie Filling

  • 4 cups sliced rhubarb
  • 2 cups granulated sugar, divided
  • 1/4 cup all-purpose flour
  • 2 tablespoons cold unsalted butter, cut into cubes
  • 1/2 teaspoon fine-grain salt
  • 3 large eggs, beaten

Crust

  • 1 (9-inch) unbaked deep-dish pie shell

Instructions

  1. Macerate Rhubarb: Place sliced rhubarb and 3/4 cup granulated sugar in a medium bowl. Let sit, stirring occasionally, until liquid forms at the bottom, about 30-45 minutes. Pour off the liquid and save if desired.
  2. Preheat Oven and Prepare Pie Shell: Preheat the oven to 400°F. Place the unbaked deep-dish pie shell on a baking sheet and set aside.
  3. Make Custard Mixture: In a large bowl, combine the remaining 1 1/4 cups granulated sugar, flour, and salt. Cut in the cold butter cubes using a pastry cutter or fork until the butter is coated and broken up. Stir in the beaten eggs until fully incorporated and no dry spots remain.
  4. Combine Rhubarb and Custard: Add the drained rhubarb to the custard mixture and stir gently to combine evenly.
  5. Fill Pie Shell and Bake: Pour the rhubarb custard mixture into the prepared pie shell. Transfer the pie (on the baking sheet) to the oven and bake at 400°F for 15 minutes.
  6. Reduce Heat and Continue Baking: Without opening the oven door, reduce the temperature to 325°F and bake for an additional 45 to 60 minutes, or until the pie’s center sets with a slight wobble.
  7. Cool and Chill: Remove pie from the oven and place on a cooling rack to reach room temperature. Cover loosely with foil and refrigerate the pie to chill before serving.

Notes

  • Frozen rhubarb can be used as an alternative; thaw and drain excess liquid before use.
  • Save the liquid from macerated rhubarb to add flavor to drinks or sauces.
  • Store leftover pie covered in the refrigerator for up to 3 days.
  • For a crispier crust, prebake the pie shell for 10 minutes before filling (optional).
  • This recipe originates from Mrs. Willis W. (Magdalena) Lehman’s contribution to Our Swiss Pantry.

Nutrition

  • Serving Size: 1 slice
  • Calories: 422
  • Sugar: 40.5 g
  • Sodium: 322 mg
  • Fat: 17.8 g
  • Saturated Fat: 5.6 g
  • Unsaturated Fat: 12.2 g
  • Trans Fat: 0 g
  • Carbohydrates: 61.5 g
  • Fiber: 1.8 g
  • Protein: 5.5 g
  • Cholesterol: 77 mg

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