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Backyard Blogging.

Baked Blueberry Slab Pie

You’ll love the jazzy, smoked blueberry flavor under the lattice crust! This Baked Blueberry Slab Pie is a showstopper that’s easy to make!



5 Cup all-purpose flour, plus more for dusting
1/4 Cup granulated sugar
1 Teaspoon kosher salt
2 Cup (4 sticks) unsalted butter, cold, cut into 1/2-inch cubes
10 Tablespoon ice water
1 Teaspoon room temperature water
1 Large Egg
1/4 Cup coarse sugar


10 Cup (2 1/2 lb) blueberries, fresh or frozen and thawed
1/2 Cup granulated sugar
2 Tablespoon cornstarch
2 Teaspoon lemon zest
1 Teaspoon vanilla extract
1 Pinch kosher salt


Make the crust: In a food processor, combine the flour, granulated sugar, and salt and pulse a few times until blended. Add the cold butter and pulse until the mixture resembles a coarse meal, about 10 pulses. Add eight tablespoons of ice water and pulse two to three times to incorporate. The dough should hold together when squeezed between your fingers but should not be sticky. If it is crumbly, add more water, one tablespoon at a time, pulsing twice after each addition.

Turn the dough out onto a clean surface and use your hands to bring it together. There should be visible chunks of butter. Divide the dough in half and shape each half into a rectangle. Wrap the rectangles separately in plastic wrap and refrigerate for at least two hours or up to overnight. Let the dough sit at room temperature for 30 minutes before rolling out.

Make the filling: In a large bowl, toss together the blueberries, granulated sugar, cornstarch, lemon zest, vanilla, and salt. Let sit while you roll out the dough.

On a lightly floured surface, roll out one dough portion into a 22 x 18-inch rectangle, about 1/8 inch thick. Wrap the dough around the rolling pin, then unroll it on top of a rimmed 13 x 18-inch baking sheet. Gently press the dough against the bottom and sides of the pan. Trim the edges with scissors or a knife, leaving a 1/2-inch overhang. Refrigerate while rolling out the dough for the lattice crust.

Roll out the remaining dough into a 22 x 18-inch rectangle. Use a ruler to mark 6 1-inch-wide spaces along the short side of the dough. With a fluted pastry roller, a pizza cutter, or a knife, cut six 1 x 22-inch strips from the dough. Gather up the scraps and re-roll the dough into an 18-inch square. Again, mark 1-inch-wide spaces along the dough and cut six 1 x 18-inch strips from the dough. (You’ll use 5 of each size strip for the lattice, but will have an extra in case one breaks). If the dough becomes too warm as you work, refrigerate to firm up before continuing.

Pour the blueberry filling into the chilled bottom crust and spread evenly. Place 5 of the longer strips lengthwise across the pie, spacing evenly. Fold back every other strip halfway and lay a short strip perpendicularly across the unfolded strips. Repeat to place 4 more short strips evenly across the pie, folding back the alternate long strips as needed. Trim any overhanging lattice strips, then pinch together the strips and overhanging bottom crust around the edges of the baking sheet.

In a small bowl, beat together the egg and room-temperature water. Brush the egg wash over the lattice crust, then sprinkle with the coarse sugar. If the dough is very warm, refrigerate for 10 minutes before baking.

When ready to cook, set the Traeger temperature to 400°F and preheat with the lid closed for 15 minutes. Place the baking sheet on the grill grate and close the lid. Bake until the crust is golden, and the filling is bubbling, about 45 minutes. Tent the pie with aluminum foil if the top is browning too quickly.

Transfer the baking sheet to a wire rack and let the pie cool for at least 1 hour before slicing and serving. Enjoy!
Recipe and photo from Traeger.