Follow these detailed steps carefully for foolproof results. The process is broken down into three main parts: creating the crust, preparing the filling, and finally, assembling and baking your miniature masterpieces.

Part 1: Crafting the Perfect Flaky Pie Crust

The secret to a truly memorable hand pie lies in its crust. Our goal is a tender, buttery dough that bakes into shatteringly flaky layers.

1. Combine Dry Ingredients: In a large mixing bowl, whisk together the 2 ½ cups of all-purpose flour and 1 teaspoon of salt. This ensures the salt is evenly distributed.
2. Cut in the Cold Butter: Add the cold, cubed butter to the flour mixture. Using a pastry blender or two knives, cut the butter into the flour until the mixture resembles coarse crumbs with some pea-sized pieces of butter still visible. It is these larger pieces of butter that will create the flaky layers. You can also use your fingertips, but work quickly to avoid warming the butter.
3. Add the Ice Water: Begin by adding 4 tablespoons of the ice water. Use a spatula or wooden spoon to gently toss the mixture until it starts to come together. Add more ice water, one tablespoon at a time, just until the dough forms a shaggy, cohesive ball. Do not over-mix or knead the dough; this is key to keeping it tender.
4. Chill the Dough: Divide the dough into two equal discs. Wrap each disc tightly in plastic wrap and flatten them slightly. Refrigerate for at least one hour, or up to two days. This chilling period is crucial: it allows the gluten to relax (preventing toughness) and solidifies the butter (ensuring maximum flakiness).

Part 2: Preparing the Warmly Spiced Apple Filling

While the dough is chilling, you can prepare the delicious apple filling. Pre-cooking the filling slightly helps to release some of the apples’ moisture, which is the best defense against a soggy pie.

1. Prep the Apples: Peel, core, and dice the apples into small, ¼-inch to ½-inch cubes. Uniformly sized pieces will ensure even cooking. Place the diced apples in a large bowl and toss them with the 1 tablespoon of lemon juice to prevent browning.
2. Combine Ingredients: In a medium saucepan, combine the diced apples, ½ cup of granulated sugar, ¼ cup of brown sugar, 1 teaspoon of cinnamon, ¼ teaspoon of nutmeg, and ⅛ teaspoon of allspice.
3. Cook the Filling: Place the saucepan over medium heat. Cook the mixture, stirring occasionally, for about 5-7 minutes. The apples should become slightly tender but not mushy, and the sugars should dissolve to create a syrup.
4. Thicken the Filling: In a small bowl, whisk the 2 tablespoons of cornstarch with 2 tablespoons of cold water to create a slurry. Pour this slurry into the apple mixture and continue to cook, stirring constantly, for another 1-2 minutes until the filling has noticeably thickened.
5. Finish and Cool: Remove the pan from the heat and stir in the 2 tablespoons of butter until it’s fully melted. Transfer the filling to a heatproof bowl and let it cool completely to room temperature. It is essential that the filling is not warm when you assemble the pies, as it will melt the butter in the crust.

Part 3: Assembling and Baking Your Mini Masterpieces

This is where the magic comes together. Ensure your oven is preheating and your baking sheets are ready.

1. Preheat and Prepare: Preheat your oven to 400°F (200°C). Line two large baking sheets with parchment paper to prevent sticking and make cleanup easier.
2. Roll the Dough: On a lightly floured surface, take one disc of chilled dough from the refrigerator. Roll it out to a thickness of about ⅛-inch.
3. Cut the Circles: Using a 4-inch or 5-inch round cutter (a wide-mouthed jar or bowl also works), cut out as many circles as you can. Gather the scraps, gently press them together, re-roll, and cut more circles. Place the dough circles onto your prepared baking sheets. Repeat with the second disc of dough.
4. Fill the Pies: In a small bowl, beat the egg with 1 tablespoon of milk to create your egg wash. Lightly brush the edges of each dough circle with the egg wash. This will act as a “glue” to seal the pies. Spoon about 1-2 tablespoons of the cooled apple filling onto one half of each circle, leaving a ½-inch border around the edge. Be careful not to overfill, as this is the primary cause of leakage.
5. Seal the Hand Pies: Gently fold the empty half of the dough circle over the filling to create a half-moon shape. Press the edges together firmly with your fingers to seal. For a more secure and decorative seal, use the tines of a fork to crimp the edges.
6. Final Touches: Using a sharp knife, cut 2-3 small slits on the top of each hand pie. These are steam vents that allow steam to escape during baking, preventing the pies from bursting open. Brush the entire top surface of each pie with the remaining egg wash.
7. Add the Sparkle: Sprinkle the tops generously with the turbinado sugar. This adds a wonderful crunch and a beautiful, glistening finish.
8. Bake to Perfection: Place the baking sheets in the preheated oven and bake for 20-25 minutes, or until the crusts are a deep golden brown and the filling is bubbly.
9. Cool and Enjoy: Let the mini apple hand pies cool on the baking sheet for at least 10 minutes before transferring them to a wire rack. The filling will be extremely hot. They can be enjoyed warm or at room temperature.