Ube Pie With Marshmallow Whip

Roll out dough on a lightly floured surface to a 12" round. Wrap dough around rolling pin and transfer to a standard 9"-diameter pie dish. Unfurl into dish, then lift edges and allow dough to slump down into edges. Trim overhang to 1". Fold overhang under to create a thick crust that is flush with rim; crimp as desired. Lightly prick bottom all over with a fork. Chill until firm, about 30 minutes.

Place a rack in middle of oven; preheat to 350°F. Line crust with parchment paper or foil and fill with pie weights or dried beans. Place on a rimmed baking sheet. Bake until edges are beginning to brown, 20–25 minutes. Carefully lift out parchment and weights. Return crust to oven and bake until golden brown all over, 10–15 minutes. Transfer to a wire rack and let cool.

Using an electric mixer on medium speed, beat eggs, ube halaya, coconut milk, granulated sugar, salt, vanilla extract, and ube extract (if using) in a large bowl until smooth, about 1 minute. Pour filling into pie crust.

Bake pie until edges of filling are set but center still jiggles slightly, 55–65 minutes. (Filling will puff as it bakes but will settle as it cools.) Transfer to a wire rack and let cool at least 2 hours. Pie can be served slightly warm or room temperature.

Using an electric mixer on medium-low speed, beat cream, Marshmallow Fluff, and powdered sugar in a medium bowl until medium peaks form, about 3 minutes. Transfer to a pastry bag fitted with a large star tip (or a resealable plastic bag with a corner snipped off). Chill marshmallow whip until ready to serve.

Pipe 8 dollops of marshmallow whip around edges of filling. Slice pie and transfer to plates. Serve with remaining marshmallow whip alongside. Do ahead: Crust can be baked 3 days ahead; store tightly wrapped at room temperature. Marshmallow whip can be made 8 hours ahead; keep chilled. Pie can be baked 1 day ahead; cover and chill. Bring to room temperature and top with marshmallow whip just before serving.