01 -
Whisk the flour, sugar, and salt in a large bowl. Cut in the cold butter until the pieces are pea-sized, then add ice water 1 tablespoon at a time until the dough just holds together.
02 -
Divide the dough into two disks, wrap, and refrigerate for at least 30 minutes. Cold dough bakes up flakier and is easier to roll.
03 -
Combine pineapple, sugar, cornstarch, lemon juice, vanilla, cinnamon, and salt in a saucepan. Cook over medium heat for 6-8 minutes, stirring often, until thick and glossy. Cool until warm or room temperature.
04 -
Heat the oven to 400°F (200°C). Roll one dough disk into a 12-inch round and fit it into a 9-inch pie plate.
05 -
Spoon the cooled pineapple filling into the bottom crust. Roll the second dough disk over the top, trim and crimp the edges, then cut several vents in the center.
06 -
Whisk the egg with milk and brush it over the top crust. Sprinkle with coarse sugar if using. Bake for 20 minutes, then reduce the oven to 375°F (190°C) and bake 25-30 minutes longer, until golden and bubbling.
07 -
Let the pie cool for at least 3 hours before cutting so the pineapple filling sets cleanly.