Blueberry Lemon Sour Cream Pie

Introduction

This pie brings together the bright, sunny flavor of lemon and the sweet depth of blueberry in the creamiest, dreamiest filling imaginable. You’ll love the contrast between the tart, velvety lemon layer and the rich, juicy blueberry topping, all cradled in a flaky crust. It’s a perfect dessert for when you want something impressive without spending hours in the kitchen.

Prep & Cook Time

• Prep Time: 25 minutes
• Cook Time: 30 minutes
• Total Time: 55 minutes (plus cooling and chilling time)
• Servings: 8

Ingredients

• 1 baked 9-inch pie crust (regular or graham cracker)
• 1 cup sugar
• 3 ½ tablespoons cornstarch
• 1 cup whole milk
• 1 tablespoon lemon zest
• ½ cup fresh lemon juice (from 2 to 3 lemons)
• 3 egg yolks (slightly beaten)
• ¼ cup butter
• 1 cup sour cream
• 21 ounce can blueberry pie filling
• 1 cup heavy whipping cream (whipped)
• 2 tablespoons powdered sugar

Instructions

1. Begin by ensuring your 9-inch pie crust is fully baked and completely cooled.
2. In a medium saucepan, whisk together the sugar and cornstarch. Gradually whisk in the whole milk until the mixture is smooth.
3. Place the saucepan over medium heat. Cook, stirring constantly, until the mixture thickens and begins to bubble, about 10-12 minutes.
4. Reduce the heat to low. Very slowly, while whisking constantly, drizzle about 1/2 cup of the hot milk mixture into the beaten egg yolks to temper them. Then, pour the entire yolk mixture back into the saucepan, whisking constantly.
5. Continue cooking on low for 2 more minutes, stirring constantly. Remove from heat.
6. Immediately stir in the butter, lemon zest, and fresh lemon juice until fully combined and the butter has melted. Let the filling cool for 15-20 minutes, stirring occasionally.
7. Once the lemon filling is lukewarm, fold in the sour cream until the mixture is smooth and uniform.
8. Pour the lemon sour cream filling into the cooled pie crust and spread it into an even layer. Place the pie in the refrigerator for at least 3 hours, or until the filling is completely set.
9. Just before serving, spread the can of blueberry pie filling evenly over the top of the chilled lemon layer.
10. In a clean bowl, whip the heavy whipping cream with the powdered sugar until stiff peaks form. Pipe or dollop the whipped cream over the blueberry topping. Serve immediately.

Variations

• Creamy Topping: For a richer finish, fold a spoonful of lemon curd or a splash of vanilla into the whipped cream before topping the pie.
• Fruit Swap: Use the lemon filling as a base for other canned pie fillings like cherry, peach, or apple for a different flavor profile each time.
• Crunchy Contrast: Add a layer of toasted sliced almonds or a sprinkle of crushed shortbread cookies between the lemon filling and the blueberry layer.
• Individual Servings: Prepare the lemon filling in pre-baked mini tart shells for elegant, single-serving desserts.

Tips for Success

• Temper Slowly: When adding the hot milk mixture to the egg yolks, do it very slowly while whisking vigorously to prevent the eggs from scrambling.
• Cool Thoroughly: Ensure the lemon filling is lukewarm (not hot) before folding in the sour cream, or the dairy may curdle.
• Chill Completely: Don’t rush the chilling step; the filling must be firm before adding the blueberry layer, or it will mix together.
• Stable Cream: Chill your bowl and beaters before whipping the cream. This helps it whip faster and hold its shape better on the pie.

Storage & Reheating

Store the assembled pie, covered, in the refrigerator for up to 3 days. The whipped cream topping is best enjoyed on the day it is made. For longer storage, add the whipped cream fresh before serving. This pie does not freeze or reheat well and is meant to be served cold.

FAQ

Can I use a store-bought crust?

Yes, absolutely. A high-quality pre-made pie crust, either regular pastry or graham cracker, works perfectly for this recipe. Just be sure to bake it according to the package directions and let it cool completely.

My filling seems a little runny. What went wrong?

This likely means the cornstarch mixture wasn’t cooked long enough after adding the eggs. It must come to a gentle bubble and thicken significantly on the stove. Also, ensure it chills for the full 3 hours to set properly.

Can I use frozen blueberries instead of canned filling?

This recipe is specifically designed for the convenience and texture of canned blueberry pie filling. Using fresh or frozen blueberries would require cooking them down with sugar and a thickener, which is a different recipe.

Why do I have to temper the eggs?

Tempering—slowly raising the temperature of the eggs with hot liquid—prevents them from cooking into solid scrambled eggs when added to the hot saucepan. It’s crucial for a smooth, silky curd.

Can I make this pie ahead of time?

You can prepare the lemon filling in the crust and chill it, covered, for up to 24 hours. Add the blueberry topping and whipped cream just before serving for the best texture.

Is there a substitute for sour cream?

For a similar tang and richness, full-fat plain Greek yogurt can be used as a 1:1 substitute. The final texture will be slightly less rich but still delicious.