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A lattice-crowned tribute to California's most celebrated hybrid berry, its deep purple filling bursting with the tang of raspberry, the sweetness of blackberry, and the wild perfume of loganberry, all cradled in an honest butter crust.
The boysenberry exists because one man refused to accept that nature had finished its work. In the 1920s, Rudolph Boysen, a Napa parks superintendent with a botanist's curiosity, crossed raspberry, blackberry, and loganberry vines on his experimental plot. The resulting hybrid produced berries of uncommon complexity: larger than any parent, darker than wine, with a flavor that seemed to contain multitudes. But Boysen abandoned his creation, and the vines nearly died on neglected trellises.
Walter Knott heard rumors of these remarkable berries and tracked down the struggling plants in 1932. He nursed them back to health on his Buena Park farm and began selling the fruit at his roadside stand. His wife Cordelia baked them into pies that stopped traffic on the coastal highway. Within a decade, Knott's Berry Farm had transformed from a Depression-era produce stand into a destination, and the boysenberry had become California's most beloved agricultural invention.
This pie honors that heritage. The filling requires restraint. Boysenberries possess enough character to carry a pie without heavy spicing or excessive sugar. You want the fruit to taste like itself: jammy and bright with a finish that lingers somewhere between tart and sweet. The lattice top isn't merely decorative. Those woven strips allow moisture to escape, concentrating the filling while the exposed berries caramelize at their edges.
A proper boysenberry pie tastes like summer in Southern California, like roadside stands and county fairs and the particular optimism of a state that believed it could improve upon nature itself.
Quantity
2 1/2 cups (315g)
Quantity
1 tablespoon
Quantity
1 teaspoon
Quantity
1 cup (2 sticks/226g)
cold, cut into 1/2-inch cubes
Quantity
6 to 8 tablespoons
Quantity
6 cups (about 1 3/4 pounds)
fresh or frozen
Quantity
3/4 cup (150g)
Quantity
3 tablespoons
Quantity
1 tablespoon
Quantity
1/4 teaspoon
Quantity
1/8 teaspoon
Quantity
2 tablespoons
cut into small pieces
Quantity
1
Quantity
1 tablespoon
Quantity
2 tablespoons
for finishing
| Ingredient | Quantity |
|---|---|
| all-purpose flour | 2 1/2 cups (315g) |
| granulated sugar (for crust) | 1 tablespoon |
| fine sea salt (for crust) | 1 teaspoon |
| unsalted butter (for crust)cold, cut into 1/2-inch cubes | 1 cup (2 sticks/226g) |
| ice water | 6 to 8 tablespoons |
| boysenberriesfresh or frozen | 6 cups (about 1 3/4 pounds) |
| granulated sugar (for filling) | 3/4 cup (150g) |
| cornstarch | 3 tablespoons |
| fresh lemon juice | 1 tablespoon |
| fine sea salt (for filling) | 1/4 teaspoon |
| almond extract | 1/8 teaspoon |
| unsalted butter (for filling)cut into small pieces | 2 tablespoons |
| large egg | 1 |
| heavy cream | 1 tablespoon |
| coarse sugarfor finishing | 2 tablespoons |
Whisk together flour, one tablespoon sugar, and one teaspoon salt in a large bowl. Add the cold butter cubes and work them into the flour using a pastry blender or your fingertips, pressing and smearing until the mixture resembles coarse meal with some pea-sized butter pieces remaining. These irregular bits will create flaky layers. Drizzle six tablespoons of ice water over the mixture and stir with a fork until the dough begins to clump. If dry spots remain, add water one tablespoon at a time. The dough should hold together when pressed but not feel wet or sticky.
Divide the dough into two portions, one slightly larger than the other. The larger portion will become your bottom crust. Shape each into a flat disk about one inch thick, wrap tightly in plastic, and refrigerate for at least one hour or overnight. This rest allows the gluten to relax and the butter to firm, preventing shrinkage and ensuring tenderness.
Whisk together three-quarters cup sugar, cornstarch, and one-quarter teaspoon salt in a large bowl. Add the boysenberries, lemon juice, and almond extract. Toss gently to coat, being careful not to crush the berries. If using frozen berries, let them thaw just until you can separate them, then proceed. Some juice will release. This is desirable.
Remove the larger dough disk from the refrigerator and let it sit for five minutes to soften just enough to roll. On a floured surface, roll from center outward, rotating the dough quarter turns to maintain a circular shape. Roll to a thickness of about one-eighth inch and a diameter of thirteen inches. Transfer to a nine-inch pie plate by rolling the dough loosely around your pin, then unrolling it over the dish. Ease the dough into the corners without stretching. Trim overhang to one inch, then refrigerate while you prepare the lattice.
Roll the smaller dough disk to a twelve-inch circle of even thickness. Using a sharp knife or fluted pastry wheel, cut into strips three-quarters inch wide. You should have twelve to fourteen strips. Transfer them to a parchment-lined baking sheet and refrigerate for fifteen minutes. Cold strips weave more easily and hold their shape.
Pour the berry filling into the chilled crust, mounding it slightly in the center. The berries will settle as they cook. Dot the surface with the two tablespoons of butter pieces. These will melt into the filling, adding richness and helping thicken the juices.
Lay half the strips across the filling, spacing them evenly. Fold back alternate strips and lay a perpendicular strip across the unfolded ones. Unfold the folded strips over this cross piece. Now fold back the strips that were previously unfolded, lay another perpendicular strip, and repeat. Continue until the lattice is complete. Trim the strip ends to match the overhang, then fold the bottom crust edge up over the lattice ends, crimping decoratively with your fingers or a fork.
Whisk together the egg and cream to make an egg wash. Brush this mixture over the lattice and crimped edges, avoiding drips onto the filling. The wash creates that burnished, bakery-quality shine. Sprinkle coarse sugar generously over the brushed surfaces. Refrigerate the assembled pie for twenty minutes while you preheat the oven to 425 degrees Fahrenheit.
Place the pie on a rimmed baking sheet to catch any bubbling juices. Bake at 425 degrees for twenty minutes until the crust begins to color. Reduce heat to 375 degrees and continue baking thirty-five to forty minutes more. The pie is done when the lattice is deeply golden, the filling bubbles thickly in the center (not just at the edges), and the juices look syrupy rather than watery. If the edges brown too quickly, shield them with strips of foil.
Transfer the pie to a wire rack and let it cool for at least four hours, preferably six. This is the hardest part. The filling needs time to set. Cut into a warm pie and the juices will run across your plate. A properly cooled boysenberry pie slices cleanly, the filling holding its shape while remaining jammy and glossy. Serve at room temperature or barely warm, with vanilla ice cream or unsweetened whipped cream.
1 serving (about 225g)
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