Blueberry Lattice Pie Recipe

Table of Contents

Deep purple berries bubble beneath crisp, golden strips of buttery pastry, giving this blueberry lattice pie a bright lemon aroma and a filling that stays juicy without spilling across the plate. The woven top lets steam escape while showing off the glossy fruit, and a light coating of egg wash adds the deeply bronzed finish a proper fruit pie deserves.

I keep the butter cold, chill the shaped pastry, and bake the pie on a preheated sheet pan so the bottom crust receives strong heat from the start. Cornstarch controls the blueberry juices, but it must visibly bubble in the center before the pie leaves the oven. Then comes the difficult bit: letting the pie cool for four full hours so the filling can set into sliceable, berry-packed wedges.

Golden blueberry lattice pie with a slice removed to show the juicy, set blueberry filling and flaky bottom crust.

Why This Blueberry Pie Is Ridiculously Delicious

The all-butter pastry uses enough water to bind the dough without making it soft, while visible cold butter pieces create flaky layers as they melt in the oven.
A 9-inch metal pie pan conducts heat efficiently, helping the bottom pastry brown before the blueberry filling can saturate it.
Cornstarch thickens the released blueberry juice once the filling bubbles thoroughly, producing a glossy consistency that settles into clean slices after cooling.
Lemon zest and juice sharpen the berries’ flavor and balance the sugar without adding enough liquid to make the filling watery.
A lattice top provides structure while leaving openings for steam, reducing trapped moisture and making the filling’s bubbling endpoint easy to see.

Ingredient Notes for Blueberry Lattice Pie with a Juicy, Sliceable Filling

All-purpose flour: Its moderate protein level gives the crust enough strength for weaving without making it tough. Weigh it when possible, and keep extra flour used for rolling to a light dusting.
Unsalted butter: Cold butter supplies flavor and creates flaky pastry layers. Cut it into small cubes, then refrigerate it until the moment it enters the flour mixture.
Ice water: Water hydrates the flour and holds the dough together. Add it gradually because flour absorbs moisture differently depending on humidity; stop when a squeezed handful remains intact.
Blueberries: Fresh, firm berries give the most predictable baking time. Frozen berries can be used directly from the freezer, but they should not be thawed because their released liquid would make assembly messy.
Granulated sugar: Sugar sweetens the tart fruit and draws out the juice needed to form the filling. Toss the filling only shortly before assembly so it does not become excessively liquid in the bowl.
Cornstarch: This starch thickens the blueberry juices into a clear, glossy filling. Accurate measurement and vigorous bubbling in the pie’s center are both necessary for full thickening.
Lemon: Finely grated zest contributes aromatic citrus oils, while the juice balances sweetness and supports a lively blueberry flavor. Zest only the yellow surface because the white pith tastes bitter.
Egg wash and coarse sugar: Egg diluted with water promotes even browning without becoming pasty. Coarse sugar adds a delicate crunch and should be scattered lightly so it does not weigh down the lattice.

THE BAKING SCIENCE BEHIND IT

How Cornstarch and Heat Create a Perfectly Sliceable Blueberry Pie Filling

Cornstarch is the key thickening agent in this blueberry pie, transforming the juicy fruit mixture into a sliceable filling. When heated, cornstarch granules absorb the liquid released by the berries and swell, eventually rupturing to release starch molecules that form a gel network. This network traps the blueberry juices, preventing the filling from running while maintaining a glossy, translucent appearance. Achieving vigorous bubbling in the pie’s center during baking is essential to fully activate this thickening process.

The gradual cooling phase after baking is equally important. As the pie cools, the starch gel continues to set and firm up, resulting in a stable filling that holds its shape when sliced. Additionally, the lattice crust benefits from cold butter and chilled dough to create flaky layers and prevent shrinking, while the hot baking sheet ensures a crisp bottom crust by providing immediate conductive heat.

Expert Baking Tips

Keep the unused dough refrigerated while working. If the rolled pastry becomes shiny, limp, or greasy, slide it onto a tray and chill it for 10 minutes before continuing.
Dry washed blueberries thoroughly. Surface water dilutes the filling and can leave pockets of unthickened juice around the berries.
Do not mix the filling far in advance. Sugar draws moisture from fruit, and a long wait creates a soupy bowl that is harder to transfer without wetting the bottom crust.
Judge doneness by both pastry color and center bubbling. Pale dough means underbaked pastry, while bubbling only at the edge does not confirm that the central starch has fully cooked.
Place foil or a clean baking sheet below the cooling rack if needed, but never cover the hot pie. Trapped steam settles on the lattice and quickly softens its crisp surface.

Ingredients for Blueberry Lattice Pie

315 g all-purpose flour (About 2 1/2 cups when spooned and leveled, plus a light dusting for rolling)
15 g granulated sugar (For the pastry, about 1 tablespoon)
5 g fine sea salt (About 1 teaspoon)
226 g unsalted butter (1 cup, cold and cut into 1/2-inch cubes)
120 ml ice water (1/2 cup; add gradually and use only as much as the dough needs)
900 g fresh blueberries (About 6 cups, rinsed and thoroughly dried)
150 g granulated sugar (3/4 cup, for the filling)
40 g cornstarch (5 level tablespoons)
2 tsp finely grated lemon zest (From about 1 large lemon)
30 ml fresh lemon juice (2 tablespoons)
0.25 tsp ground cinnamon (Adds gentle warmth without masking the berries)
0.125 tsp fine sea salt (For the blueberry filling)
1 large egg (Cold, for the egg wash)
15 ml water (1 tablespoon, for the egg wash)
12 g coarse sugar (About 1 tablespoon, for finishing the lattice)

How to Make Blueberry Lattice Pie

STEP 1). Make and chill the all-butter pastry Whisk the flour, pastry sugar, and salt in a large bowl. Add the cold butter and cut it into the flour with a pastry blender until most pieces are pea-sized, with a few flatter pieces remaining. Drizzle in 90 ml of the ice water while tossing with a fork, then add the remainder a teaspoon at a time until a squeezed handful holds together. Divide into two disks, making one slightly larger, wrap tightly, and refrigerate for 60 minutes.
STEP 2). Roll and fit the bottom crust Set the larger dough disk on a lightly floured work surface and roll it from the center outward into a 12-inch circle about 1/8 inch thick, rotating it frequently to prevent sticking. Loosely wrap the dough around the rolling pin and transfer it to a 9-inch metal pie pan. Ease it into the corners without stretching, leaving a 1-inch overhang. Refrigerate the lined pan while rolling the second disk into an 11-inch circle, then cut it into ten strips about 1 inch wide.
STEP 3). Mix and fill the blueberry layer In a large bowl, whisk the filling sugar, cornstarch, lemon zest, cinnamon, and salt until no starch lumps remain. Add the dry blueberries and lemon juice, then fold with a flexible spatula until every berry is evenly coated. Work promptly because the sugar will begin drawing out juice. Transfer the mixture, including any dry ingredients in the bowl, to the chilled shell. Spread it evenly and mound the berries slightly toward the center rather than pressing them down.
STEP 4). Weave and finish the lattice Lay five pastry strips parallel across the filling. Fold back alternating strips halfway, place one strip perpendicular across the center, and return the folded strips. Repeat in both directions, alternating which strips are folded, until the lattice covers the pie. Trim the lattice and bottom crust to a 1-inch overhang, press the layers together, fold them underneath, and crimp the rim. Whisk the egg with 15 ml water, brush it lightly over exposed pastry, and sprinkle with coarse sugar.
STEP 5). Chill the pie and heat the oven Place the assembled pie in the refrigerator for 15 minutes to firm the butter and relax the pastry before baking. Meanwhile, position a rack in the lower third of the oven, set a rimmed baking sheet on it, and preheat to 425°F for at least 20 minutes. The hot sheet gives the bottom crust immediate conductive heat. Check that the lattice feels firm, not soft or greasy, before carefully setting the pie pan on the heated baking sheet.
STEP 6). Bake until deeply golden and bubbling Bake at 425°F for 20 minutes, then reduce the oven temperature to 375°F without opening the door. Continue baking for 45 to 55 minutes, until the crust is deeply golden and thick blueberry juices bubble vigorously through openings near the center, not only around the edge. If the rim browns too quickly, shield only the edge with foil. A few slow bubbles are insufficient because the cornstarch needs sustained heat to thicken the filling properly.
STEP 7). Cool completely before slicing Using oven mitts, transfer the pie pan from the hot baking sheet to a wire rack. Cool at room temperature for at least 4 hours, leaving the pie uncovered so condensation does not soften the crust. The filling will look loose immediately after baking but will thicken as its starch network cools. Once fully set, cut eight wedges with a sharp knife, wiping the blade between cuts, and lift each piece with a thin pie server to protect the bottom crust.

Storage and Freezing

Storage: Keep the fully cooled pie loosely covered at room temperature for up to 1 day.
Refrigerate after that and use within 4 days.
Freezing: Freeze the completely cooled pie or individual slices until firm, then wrap securely and place in an airtight container for up to 2 months.
Thawing: Thaw wrapped pie in the refrigerator overnight so condensation forms on the wrapping rather than directly on the pastry.
Serving: Serve at room temperature, or warm individual slices on a baking sheet at 325°F for 8 to 10 minutes. Microwaving softens the crust.

Frequently Asked Questions

Why is my blueberry pie filling watery?

A watery filling usually means the center did not bubble long enough or the pie was sliced while warm. Cornstarch needs sustained heat, so look for thick bubbles breaking through the lattice near the center before removing the pie.

Cooling is equally important. Give this blueberry lattice pie at least four hours at room temperature so the hot, fluid filling can settle into a sliceable gel around the berries.

How do you avoid a soggy bottom in blueberry lattice pie?

Use a metal pie pan and bake it on a preheated rimmed sheet in the lower third of the oven. That strong initial heat helps set and brown the bottom pastry before blueberry juice can soak into it.

Keep the lined shell cold, dry washed berries carefully, and assemble the filling only when the crust is ready. Fully baking the pie until the lattice is deeply golden matters more than pulling it early to preserve a pale edge.

Can I make this blueberry lattice pie with frozen blueberries?

Frozen blueberries can replace the same weight of fresh berries, but add them directly from the freezer and do not thaw them. Thawed berries release substantial juice before baking and make the lattice difficult to assemble cleanly.

Expect the pie to need additional oven time because the frozen fruit lowers the filling temperature. Keep baking until vigorous bubbles appear near the center, shielding the rim with foil if it reaches a deep golden color first.

How long should blueberry lattice pie cool before cutting?

A full four-hour cooling period at room temperature gives the cornstarch-thickened juices time to set. Cutting earlier releases steam and interrupts that structure, so even a correctly baked filling can run across the plate.

Place the uncovered pie on a wire rack, which allows air to circulate beneath the pan. The bottom of the pan should feel completely cool, not faintly warm, before you cut the first wedge.

What parts of blueberry lattice pie can be made ahead?

The pastry disks can be refrigerated for up to 2 days when wrapped tightly. Let very firm dough stand at room temperature for 5 to 10 minutes before rolling, just until it bends without cracking around the edges.

The finished pie can be baked one day before serving and kept loosely covered at room temperature once fully cool. Avoid mixing the blueberry filling ahead because the sugar draws juice from the fruit and weakens control over the final consistency.

More Ridiculously Delicious Pies & Tarts

Blueberry Lattice Pie with a Juicy, Sliceable Filling

A from-scratch 9-inch blueberry lattice pie with flaky all-butter pastry and a lemon-brightened blueberry filling thickened with cornstarch for juicy but clean slices.

Print Recipe Pin Recipe

Prep Time 45

Cook Time 1 10

Cooling 5 15

Total Time 7 10

Servings: 8 slices

Course: Dessert

Cuisine: American

Calories: 533

Ingredients Equipment Method Notes

Ingredients

315 g all-purpose flour About 2 1/2 cups when spooned and leveled, plus a light dusting for rolling
15 g granulated sugar For the pastry, about 1 tablespoon
5 g fine sea salt About 1 teaspoon
226 g unsalted butter 1 cup, cold and cut into 1/2-inch cubes
120 ml ice water 1/2 cup; add gradually and use only as much as the dough needs
900 g fresh blueberries About 6 cups, rinsed and thoroughly dried
150 g granulated sugar 3/4 cup, for the filling
40 g cornstarch 5 level tablespoons
2 tsp finely grated lemon zest From about 1 large lemon
30 ml fresh lemon juice 2 tablespoons
0.25 tsp ground cinnamon Adds gentle warmth without masking the berries
0.125 tsp fine sea salt For the blueberry filling
1 large egg Cold, for the egg wash
15 ml water 1 tablespoon, for the egg wash
12 g coarse sugar About 1 tablespoon, for finishing the lattice

Equipment

Digital kitchen scale or dry and liquid measuring cups
Large mixing bowl
Pastry blender or two table knives
Plastic wrap
Rolling pin
9-inch metal pie pan, approximately 1 1/2 inches deep
Pastry wheel or sharp knife
Small bowl and pastry brush
Rimmed baking sheet
Wire cooling rack

Method

Whisk the flour, pastry sugar, and salt in a large bowl. Add the cold butter and cut it into the flour with a pastry blender until most pieces are pea-sized, with a few flatter pieces remaining. Drizzle in 90 ml of the ice water while tossing with a fork, then add the remainder a teaspoon at a time until a squeezed handful holds together. Divide into two disks, making one slightly larger, wrap tightly, and refrigerate for 60 minutes.
Set the larger dough disk on a lightly floured work surface and roll it from the center outward into a 12-inch circle about 1/8 inch thick, rotating it frequently to prevent sticking. Loosely wrap the dough around the rolling pin and transfer it to a 9-inch metal pie pan. Ease it into the corners without stretching, leaving a 1-inch overhang. Refrigerate the lined pan while rolling the second disk into an 11-inch circle, then cut it into ten strips about 1 inch wide.
In a large bowl, whisk the filling sugar, cornstarch, lemon zest, cinnamon, and salt until no starch lumps remain. Add the dry blueberries and lemon juice, then fold with a flexible spatula until every berry is evenly coated. Work promptly because the sugar will begin drawing out juice. Transfer the mixture, including any dry ingredients in the bowl, to the chilled shell. Spread it evenly and mound the berries slightly toward the center rather than pressing them down.
Lay five pastry strips parallel across the filling. Fold back alternating strips halfway, place one strip perpendicular across the center, and return the folded strips. Repeat in both directions, alternating which strips are folded, until the lattice covers the pie. Trim the lattice and bottom crust to a 1-inch overhang, press the layers together, fold them underneath, and crimp the rim. Whisk the egg with 15 ml water, brush it lightly over exposed pastry, and sprinkle with coarse sugar.
Place the assembled pie in the refrigerator for 15 minutes to firm the butter and relax the pastry before baking. Meanwhile, position a rack in the lower third of the oven, set a rimmed baking sheet on it, and preheat to 425°F for at least 20 minutes. The hot sheet gives the bottom crust immediate conductive heat. Check that the lattice feels firm, not soft or greasy, before carefully setting the pie pan on the heated baking sheet.
Bake at 425°F for 20 minutes, then reduce the oven temperature to 375°F without opening the door. Continue baking for 45 to 55 minutes, until the crust is deeply golden and thick blueberry juices bubble vigorously through openings near the center, not only around the edge. If the rim browns too quickly, shield only the edge with foil. A few slow bubbles are insufficient because the cornstarch needs sustained heat to thicken the filling properly.
Using oven mitts, transfer the pie pan from the hot baking sheet to a wire rack. Cool at room temperature for at least 4 hours, leaving the pie uncovered so condensation does not soften the crust. The filling will look loose immediately after baking but will thicken as its starch network cools. Once fully set, cut eight wedges with a sharp knife, wiping the blade between cuts, and lift each piece with a thin pie server to protect the bottom crust.

Notes

Keep the unused dough refrigerated while working. If the rolled pastry becomes shiny, limp, or greasy, slide it onto a tray and chill it for 10 minutes before continuing.
Dry washed blueberries thoroughly. Surface water dilutes the filling and can leave pockets of unthickened juice around the berries.
Do not mix the filling far in advance. Sugar draws moisture from fruit, and a long wait creates a soupy bowl that is harder to transfer without wetting the bottom crust.
Judge doneness by both pastry color and center bubbling. Pale dough means underbaked pastry, while bubbling only at the edge does not confirm that the central starch has fully cooked.
Place foil or a clean baking sheet below the cooling rack if needed, but never cover the hot pie. Trapped steam settles on the lattice and quickly softens its crisp surface.