Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Begin by preparing the crust. In a large bowl, whisk together the flour, sugar, and salt. Add the cold cubed butter and use a pastry blender (or pulse in a food processor) to cut the butter into the flour until you have pea-sized pieces. The varying sizes of butter create pockets of steam during baking that result in those beautiful flaky layers we're after.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>Combine the ice water and apple cider vinegar in a small bowl. The vinegar inhibits gluten formation, ensuring your crust stays tender. Drizzle this mixture, one tablespoon at a time, into your flour mixture, stirring gently with a fork until the dough just begins to come together. You might not need all the liquid - stop when the dough holds together when squeezed.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Divide the dough into two equal portions, shape each into a flat disc, wrap in plastic wrap, and refrigerate for at least 2 hours, preferably overnight. This resting period allows the gluten to relax and the butter to firm up, both crucial for a flaky crust.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>While the dough chills, prepare your elderberries. If using fresh berries, carefully remove all stems (they contain toxic compounds), rinse thoroughly, and pat dry. In a large bowl, gently toss the elderberries with sugar, cornstarch, lemon juice, cinnamon, nutmeg, and salt. The cornstarch will thicken the juicy berries as they bake, preventing a soggy bottom crust.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Preheat your oven to 200°C (400°F) and place a baking sheet on the lowest rack to catch any potential overflow. Remove one disc of dough from the refrigerator and let it sit for about 10 minutes to slightly soften. On a lightly floured surface, roll it out to a circle about 30cm (12 inches) in diameter and about 3mm (⅛ inch) thick.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Carefully transfer the rolled dough to your pie dish by draping it over your rolling pin. Press it gently into the corners without stretching the dough (which can cause shrinkage during baking). Trim the edges leaving about 2.5cm (1 inch) overhang. Return the pie dish to the refrigerator while you prepare the top crust.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Roll out the second disc of dough to the same thickness. For a lattice top, cut the dough into strips about 2.5cm (1 inch) wide using a pastry wheel or sharp knife. For a solid top crust, keep it whole but cut a few decorative vents to allow steam to escape.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Remove the pie dish from the refrigerator and pour in your elderberry filling, mounding it slightly in the center. If making a lattice top, arrange half the strips across the pie in one direction, then fold back every other strip halfway. Place a strip perpendicular to them, then unfold the folded strips. Repeat this weaving process until the entire pie is covered.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Trim excess dough from the edges, then fold the overhanging bottom crust over the lattice strips and press to seal. Crimp the edges decoratively with your fingers or a fork. Whisk together the egg and milk to create an egg wash, then brush it over the top crust. This will give your finished pie a beautiful golden sheen. Sprinkle with coarse sugar for a sparkling finish and extra crunch.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>Place the pie on the preheated baking sheet and bake at 200°C (400°F) for 20 minutes. This initial high heat helps set the crust structure. Then reduce the temperature to 175°C (350°F) and bake for an additional 30-35 minutes, until the crust is deeply golden and the filling is bubbling vigorously through the lattice. If the edges brown too quickly, shield them with aluminum foil.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>Allow the pie to cool completely on a wire rack for at least 3 hours before slicing. This cooling period is crucial - it allows the filling to set properly so it doesn't run when cut. Your patience will be rewarded with clean, beautiful slices that hold their shape. Serve at room temperature or slightly warm, perhaps with a scoop of vanilla ice cream for the perfect contrast to the tart berries.</li></ol>