Prepare Crust: Roll dough into a ⅛-inch-thick circle and transfer to a 9-inch pie plate. Trim and flute edges, then refrigerate for 30 minutes.
Blind Bake: Preheat oven to 450°F, line crust with foil, and fill with pie weights. Bake 15–20 minutes, remove weights, and bake an additional 3–6 minutes.
Cook Filling: In a saucepan, whisk sugar and cornstarch. Gradually stir in milk. Bring to boil, reduce heat, and cook for 2 minutes or until thickened.
Add Flavor: Remove from heat, stir in butter and vanilla until melted. Sprinkle in cinnamon.
Bake and Chill: Pour filling into crust, sprinkle extra cinnamon, and bake at 375°F for 15–20 minutes until golden. Cool, then refrigerate until set.
Serve: Slice and enjoy chilled, optionally topped with whipped coconut cream.
