Blueberry Pie Bars

Hazelnut flour adds a rich nuttiness to this easy crust, which you can cut into shapes or simply crumble into bits for the top. You can find hazelnut flour/meal in most grocery stores, or you can buy it online.

Yield: Makes 2 dozen.

1 cup hazelnut flour

1/ 2 teaspoon baking powder

1⁄2 teaspoon ground cardamom

2 cups plus 2 tablespoons all-purpose flour, plus more 1 1⁄4 cups granulated sugar

1 teaspoon fine sea salt

8 tablespoons cold unsalted butter, cut into 1 / 2-inch

cubes

1 large egg, beaten

4 cups fresh blueberries

2 tablespoons fresh lemon juice

Powdered sugar, for dusting

Whisk the hazelnut flour, baking powder and cardamom with two cups all-purpose flour, three-quarters cup granulated sugar and three-quarters teaspoon salt in a large bowl. Add the butter, toss to coat and press into the dry ingredients using a pastry cutter or your fingers until coarse crumbs form. Drizzle the egg over, and mix with a fork or your fingers until incorporated and the mixture forms large clumps. Or, use a food processor and pulse the dry ingredients until mixed, then pulse in the butter until coarse crumbs form. Add the egg and pulse until large clumps form.

Line the bottom and sides of a 13-by-9-inch cake pan with foil, leaving overhang on all sides, and lightly coat the foil with nonstick cooking spray. Scatter two-thirds of the dough clumps evenly across the bottom of the pan, then press into the bottom in an even layer. Gather the remaining dough, press into a one-inch-thick disk and wrap in plastic wrap. Refrigerate both until the dough is firm, at least 30 minutes.

Meanwhile, arrange the oven racks in the top and bottom thirds of the oven and heat to 375 degrees.

Prepare the blueberry filling by mixing the remaining two tablespoons all-purpose flour, half a cup granulated sugar and one-quarter teaspoon salt in a large bowl. Add the blueberries and lemon juice and fold until evenly mixed. Spread the blueberry mixture over the chilled dough in the pan. Bake on the lower rack until the blueberry mixture is jammy and bubbling around the edges, 50 to 55 minutes.

While that bakes, unwrap the disk of dough, reserving the plastic wrap, and put on a lightly floured surface. Cover the dough disk with the plastic wrap and roll to a quarterinch thickness. Uncover and use a one-and-a-half-inch cookie cutter (whatever shape you like) to cut out 24 shapes. Gather scraps, reroll and cut again if needed.

Line a large cookie sheet with parchment paper. Put the shapes on the sheet, spacing one inch apart. Bake on the upper rack (while the blueberry base is baking on the bottom rack) until golden brown, 12 to 15 minutes. Cool completely on the sheet on a rack. Dust with powdered sugar.

Place the pan with the blueberry mixture on a rack and let cool just until the bubbling subsides, then arrange the cookies on top in a six-by-four grid and gently and carefully press into the hot blueberry mixture. Cool completely on the rack.

Using the overhanging foil, lift and slide the bars onto a cutting board and cut into 24 bars.

Variations: Blueberry Almond Bars

Substitute almond flour for the hazelnut flour.

Mixed Berry Bars

Substitute a mixture of blueberries, raspberries and blackberries for the blueberries. Do not use strawberries, as their water content is much higher.

Blueberry Crumb Bars

Instead of pressing the remaining one-third of dough for the top into a disk and cutting into shapes, refrigerate it in clumps. After spreading the blueberry mixture over the chilled bottom dough, break the large clumps reserved for the top into smaller clumps and scatter evenly over the blueberry mixture. Omit the powdered sugar. Bake in the center of the oven until the filling is bubbling and the topping is golden brown, 50 to 55 minutes. Make Ahead: The dough can be made and refrigerated for up to two days before baking.