Rhubarb Sour Cream Pie is one of those classic desserts that feels old-fashioned in the best way. It has a flaky crust, a creamy filling, plenty of tart rhubarb, and a crumb topping that turns golden in the oven. The contrast is what makes it so memorable. You get sharp fruit, a smooth custard-like center, and a buttery top layer all in one slice.
This is also the kind of pie that works well for more than one occasion. It looks right at home on a spring table, but it is just as welcome at a weekend family dinner or as a make-ahead dessert for guests. The ingredient list is straightforward, and the method is not difficult once you understand the order of the steps. You build the filling first, give the pie a head start in the oven, and finish it with a crumb topping that adds texture and sweetness. If you want more sweet ideas in the same spirit, the Desserts category is a good place to keep browsing.
Another reason this pie works so well is that sour cream softens rhubarb’s sharpness without covering it up. The filling still tastes like rhubarb, but it has a rounder, richer finish. Cinnamon and nutmeg add a gentle warmth in the background, which gives the pie more depth without turning it into a spice-heavy dessert. That balance matters here. Rhubarb has a strong personality, and this recipe lets it stay front and center.
Rhubarb Sour Cream Pie
A good rhubarb pie should taste bright and fresh, but it also needs enough sweetness and body to feel satisfying. That is exactly what happens here. The sugar and sour cream make the filling creamy and smooth, while the cornstarch helps it set into neat slices once the pie has cooled. The crumb topping is more than a finishing touch. It gives the pie a soft crunch and a little extra richness that works especially well with the tart filling underneath.
This recipe is also flexible with the fruit. Fresh rhubarb is lovely when it is in season, but frozen rhubarb can work too as long as it is thawed and drained well first. That simple detail matters because too much extra moisture can thin the filling and make the pie harder to slice cleanly. A few small details make a big difference here, and that is one of them. Penn State Extension has a useful guide to rhubarb in the garden and the kitchen, and the University of Minnesota also has a practical page on freezing fruit if you are working with frozen rhubarb.
Ingredients
- 1 prepared 9-inch pie crust
- 1 cup granulated sugar
- 2 tablespoons cornstarch
- 1 teaspoon ground cinnamon
- 1/4 teaspoon ground nutmeg
- 8 ounces full-fat sour cream
- 1 large egg
- 3 cups fresh or frozen rhubarb, thawed and drained if frozen
Crumb topping
- 1/2 cup packed light brown sugar
- 3/4 cup all-purpose flour
- 1/2 teaspoon salt
- 1/3 cup cold unsalted butter
The ingredients are familiar, which is part of the appeal. Rhubarb brings the tart bite. Sour cream gives the filling a creamy texture and mellow finish. The egg helps bind everything together, while cornstarch keeps the filling from feeling loose. In the topping, brown sugar adds a deeper sweetness than white sugar would, and cold butter helps create the crumbly texture you want.
How to Make Rhubarb Sour Cream Pie
Start by fitting the prepared pie crust into a 9-inch pie pan. Press it in gently and prick it all over with a fork. That step helps keep the base from puffing too much before the filling has time to settle into it. It is a simple start, but it helps the finished pie keep a better shape.
Next, make the filling. Whisk together the granulated sugar, cornstarch, cinnamon, and nutmeg in a large mixing bowl. Mixing the dry ingredients first helps the cornstarch and spices spread evenly through the filling. Stir in the sour cream and egg until smooth, then fold in the rhubarb. The mixture will look thick and creamy, and the rhubarb should be fully coated.
Pour the filling into the prepared crust and cover the edges with a pie shield or foil. The first bake at the higher temperature gives the crust a stronger start. After 15 minutes at 400 degrees Fahrenheit, lower the heat to 350 degrees Fahrenheit and bake for another 15 minutes. At that point, the filling will not be fully done yet, but it will be ready for the topping.
For the crumb topping, combine the brown sugar, flour, and salt in a bowl, then cut in the cold butter with a fork until the mixture looks crumbly. Sprinkle it evenly over the pie, remove the shield or foil, and return the pie to the oven for 20 minutes. The topping should turn golden and the pie should look set around the edges.
Once baked, cool the pie on a wire rack. This part is important. A rhubarb pie slices better after it has had time to settle. You can serve it at room temperature or chilled, and both are good. At room temperature, the filling tastes softer and creamier. Chilled, it feels a little firmer and more refreshing.
Tips for the Best Pie
Drain frozen rhubarb very well. That is one of the biggest factors in how neatly the pie sets. Too much extra liquid can thin the filling and make the crust softer than you want.
Keep the butter cold for the crumb topping. Cold butter gives you better crumbs and a lighter texture on top. If the butter is too soft, the topping can turn pasty instead of crumbly.
Do not rush the cooling step. Warm pie is tempting, but this one improves as it rests. Giving it time makes the filling easier to slice and helps the flavors settle together.
Serving, Storage, and Make-Ahead Notes
This pie is very good on its own, but it also works nicely with a spoonful of whipped cream or a scoop of vanilla ice cream if you want something extra. Since the filling contains sour cream and egg, leftovers should be refrigerated. Cover the pie once it has cooled fully and keep it in the fridge.
It is also a handy dessert to make ahead. You can bake it earlier in the day and chill it until serving time. That actually suits the recipe well, since the filling has more time to firm up and the flavors come together even more. If you want another berry-forward dessert for the table, creamy no-bake cheesecake with berries and classic chocolate lava cake are both nice options on the site.
Frequently Asked Questions
Can I use frozen rhubarb?
Yes. Just thaw it fully and drain it well before adding it to the filling.
Does the pie need to be refrigerated?
Yes. Because the filling contains sour cream and egg, leftovers should be stored in the refrigerator.
Is it better warm or cold?
Both work. At room temperature the filling feels softer and creamier, while chilled pie slices more neatly and tastes brighter.
Rhubarb Sour Cream Pie
Equipment
- 9-inch pie pan
- Rolling Pin
- pie shield or foil
- mixing bowls of various sizes
Ingredients
- 1 9-inch prepared pie crust
- 1 cup granulated sugar
- 2 Tablespoons cornstarch
- 1 teaspoon ground cinnamon
- 1/4 teaspoon ground nutmeg
- 8 oz. full fat sour cream
- 1 large egg
- 3 cups fresh or frozen rhubarb if using frozen, thaw completely and drain first
Crumb topping
- 1/2 cup light brown sugar packed
- 3/4 cup all-purpose flour
- 1/2 teaspoon salt
- 1/3 cup unsalted butter cold
Instructions
- Roll out 1 -9″ pie crust and press into 9” pie pan. Prick gently all over with fork.
- In a large mixing bowl, whisk together the 1 cup granulated sugar, 2 Tablespoons cornstarch, 1 teaspoon ground cinnamon and 1/4 teaspoon ground nutmeg.
- Stir in the 8 oz. sour cream and 1 large egg. Gently fold in the 3 cups fresh or frozen rhubarb* (frozen rhubarb should be thawed and drained first).
- Pour mixture into prepared pie pan. Cover edges of pie with pie shield or foil and bake pie at 400℉ for 15 minutes. Reduce heat and bake an additional 15 minutes at 350℉, then remove from oven.
- In a mixing bowl, combine the 1/2 cup light brown sugar, 3/4 cup all-purpose flour, 1/2 teaspoon salt and cut in 1/3 cup unsalted butter with a fork until crumbly. Sprinkle over the pie, remove pie shield or foil and return pie to oven and bake an additional 20 minutes or until the topping is golden brown.
- Cool pie on a wire rack; serve room temperature or cold. Refrigerate any leftovers.
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