Rhubarb Custard Pie

This old-fashioned Rhubarb Custard Pie has rich, sweet filling and classic lattice top crust. A delicious dessert for spring and summer when fresh rhubarb is abundant in the garden and markets.

a slice of rhubarb custard pie on a plate next to the pie

When I was growing up, springtime and early summer always meant the rhubarb was ripe for eating. We would have rhubarb preserves, rhubarb and strawberry pie, and this delicious rhubarb custard pie. This old fashioned rhubarb custard pie recipe is from the archives of my grandmother. If you’ve never had rhubarb pie, you simply must try it.

This is a dessert pie you won’t easily forget. It’s a decadent treat that’s just perfect for summer. A flaky pie crust is filled with tart rhubarb and a sweet and creamy egg custard enlivened with touches of cinnamon and vanilla.

Serve this old-fashioned rhubarb custard pie recipe at your next cookout or bring it along to a potluck dinner. This is a wonderful way to use fresh rhubarb, and everyone will love this rhubarb custard pie recipe. Rhubarb is so good in pies that it was once known as the pie plant!

Is Rhubarb a Fruit or a Vegetable?

Rhubarb is often thought to be a fruit because of its sour, fruity taste, and the fact that it is mainly used for desserts, but actually it’s technically a vegetable. Only the red/green stems are edible – remove the big dark green leaves and throw them on the compost heap. The leaves contain toxic oxalic acid and should never be eaten.

Can I Use Frozen Rhubarb?

Frozen rhubarb is a great alternative when the fresh kind is out of season. Here’s how to use frozen rhubarb:

  • Thaw the rhubarb.
  • Drain and pat the rhubarb dry.
  • Toss the rhubarb with a tablespoon of flour to account for any extra moisture

How Can I Tell When My Rhubarb Custard Pie Is Done?

Check the custard for visible clues. It should be just set in the center and not soupy. The filling should wiggle a little but not move around. Also, the edges of the custard might be slightly raised when done. If your custard is not quite ready but almost, turn off the oven and leave the pie in for another 10 to 15 minutes. This will give you some extra bake time without overcooking.

Should I Refrigerate My Rhubarb Pie?

Warm rhubarb pie straight from the oven is the absolute best, and it may well get all eaten up before you have a chance to think about any uneaten slices. However, if there are any leftovers, it’s important to know how to store them safely. This copykat pie is made with egg custard, so it does require refrigeration at a safe temperature.

This recipe is from the archives of my grandmother, Ethel Eynard.  Jefferson City, MO. 1981.


Here is what you need to make the pie:

  • Unbaked pie crust (refrigerated or homemade pie crust recommended)
  • Eggs
  • Milk
  • Flour
  • Sugar
  • Cinnamon
  • Vanilla
  • Fresh Rhubarb
  • Butter

rhubarb custard pie ingredients

How to Make Rhubarb Custard Pie

Combine eggs, milk, flour, sugar, cinnamon, and vanilla until smooth.

Stir in chopped rhubarb.

rhubarb custard pie filling in a mixing bowl

Roll out half of the pie crust dough. Place in a 9-inch pie plate.

Spoon filling into crust and top with butter pieces.

Roll out the remaining pie crust dough and cut into 1/2 inch strips.

strips of pie crust

Weave strips over pie filling for a lattice top.

Pinch top and bottom crust on the edge together, turn under, and pinch to make a fluted edge.

Brush top crust with milk and sprinkle with sugar.

Bake at 400 degrees for 45 minutes or until pie crust is golden brown.

a whole rhubarb custard pie with a lattice crust

Frequently Asked Questions

Here are answers to questions about rhubarb custard pie:

Does rhubarb custard pie get soggy when placed in the refrigerator?
It can get soft the longer it sits inside of the refrigerator. For best results, this pie should be consumed in one or two days.

How to store rhubarb custard pie.
Enjoy the pie while warm, but if there is some left-over, wait until it cools completely before loosely covering it and storing it in the refrigerator.

How to freeze rhubarb custard pie.

  • Wrap the whole pie tightly with either plastic wrap or aluminum foil.
  • Place wrapped pie into a large freezer bag.
  • Freeze for up to six months

rhubarb custard pie in a baking dish

Love rhubarb? Try these recipes

Favorite Pie Recipes

Take a look at more of the best pie recipes and favorite spring food.

a slice of rhubarb custard pie on a plate next to the pie

Rhubarb Custard Pie

In the spring it's always time to make my Grandmother's famous Rhubarb Custard pie. 
5 from 1 vote
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Course: Dessert
Cuisine: American
Keyword: Pie Recipes, Pies, Rhubarb
Servings: 8
Calories: 431kcal


  • 2 unbaked pie shell top and bottom
  • 2 eggs
  • 3 tablespoons milk
  • 1 3/4 cups sugar
  • 4 tablespoons flour
  • 1/4 teaspoons cinnamon
  • 1 teaspoon vanilla
  • 2 pounds fresh rhubarb , cut into 1-inch lengths (4 cups)
  • 2 tablespoons butter


  • Preheat an oven to 400 degrees.
  • Beat eggs, milk, sugar, flour, cinnamon and vanilla in a large bowl just until blended.  Stir in rhubarb.  Roll out half the pastry to fit a 9-inch pie plate.  Spoon in filling; dab with butter.  
  • Roll out remaining pastry; cut in 1/2 inch strips. Weave strips over filling for lattice top. Pinch top and bottom crusts together; turn under; pinch to make a stand-up fluted edge. Brush pastry with milk; sprinkle with sugar. Bake at 400 degrees for 45 minutes or until pastry is golden brown.


Calories: 431kcal | Carbohydrates: 72g | Protein: 4g | Fat: 14g | Saturated Fat: 5g | Cholesterol: 8mg | Sodium: 206mg | Potassium: 375mg | Fiber: 3g | Sugar: 45g | Vitamin A: 210IU | Vitamin C: 9.1mg | Calcium: 112mg | Iron: 1.5mg
Tried this recipe?Mention @CopyKatRecipes or tag #CopyKatRecipes!

About Stephanie Manley

I recreate your favorite restaurant recipes, so you can prepare these dishes at home. I help you cook dinner, and serve up dishes you know your family will love. You can find most of the ingredients for all of the recipes in your local grocery store.

Stephanie is the author of CopyKat.com's Dining Out in the Home, and CopyKat.com's Dining Out in the Home 2.

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Reader Interactions


  1. Terry Dietrich

    This sounds yummy & interesting…. but not quite a real custard—can’t wait to try it though. I, too, have a family hand-me-down Rhubarb Custard recipe that’s truly a full-blown custard pie that you line the bottom of a single crust with a single layer of fruit, then it rises to the top of the custard filling as it cooks flavoring the custard so it’s a creamy-sweet w/ a hint of Rhubarb tartness topped off with meringue … best served ice cold… no cinnamon or nutmeg needed. Love old unique recipes.

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