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Perfect Rhubarb Custard Pie Recipe with Easy Flaky Butter Crust

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A classic rhubarb custard pie featuring a flaky butter crust and a smooth, creamy custard filling balanced with tart rhubarb. Perfect for spring gatherings and comforting desserts.

Ingredients

Scale
  • 2 ½ cups (315g) all-purpose flour
  • 1 teaspoon salt
  • 1 tablespoon granulated sugar (optional)
  • 1 cup (226g) unsalted butter, cold and cut into small cubes
  • 6–8 tablespoons ice water
  • 4 cups (about 500g) fresh rhubarb, chopped into ½-inch pieces
  • 1 ½ cups (300g) granulated sugar, divided
  • 3 large eggs, room temperature
  • 1 ½ cups (360ml) whole milk
  • ½ cup (120ml) heavy cream
  • 2 tablespoons all-purpose flour
  • 1 teaspoon vanilla extract
  • Pinch of salt

Instructions

  1. Make the Flaky Butter Crust (15 minutes prep + chilling): In a large bowl, whisk together flour, salt, and sugar. Add cold butter cubes and cut them into the flour using a pastry cutter or food processor pulses until mixture resembles coarse crumbs with some pea-sized bits. Slowly add ice water, one tablespoon at a time, mixing gently until dough just comes together. Don’t overwork it! Divide dough into two disks, wrap in plastic, and chill for at least 30 minutes.
  2. Prepare the Rhubarb: While dough chills, toss the chopped rhubarb with ½ cup (100g) sugar in a bowl. Set aside for 15 minutes to macerate, then drain excess liquid carefully (reserve liquid for another use if you like).
  3. Roll out and assemble the crust (10 minutes): On a lightly floured surface, roll one dough disk into a 12-inch (30cm) circle. Transfer to your 9-inch pie dish, gently pressing it into the corners. Trim edges to about 1 inch (2.5cm) overhang. Chill crust-lined dish while you prepare filling.
  4. Make the custard filling (10 minutes): In a medium bowl, whisk eggs, remaining 1 cup (200g) sugar, flour, salt, milk, cream, and vanilla extract until smooth. Pour the custard mixture over the drained rhubarb and stir gently to combine.
  5. Fill and top the pie (5 minutes): Pour the rhubarb custard mixture into the chilled crust. Roll out the second dough disk and cut into strips for a lattice top or cover whole and cut slits for venting. If making a lattice, weave strips over the filling, then trim and crimp edges. Brush crust with a little milk or beaten egg for a golden finish, and sprinkle with sugar if desired.
  6. Bake the pie (50-60 minutes): Place pie on a baking sheet and bake in a preheated 375°F (190°C) oven. Bake until crust is golden and custard is set but slightly jiggly in the center (use a toothpick test). If crust edges brown too quickly, cover them with foil halfway through.
  7. Cool before serving (2 hours): Let the pie cool completely on a wire rack to allow custard to set fully. This step is crucial for clean slices and that perfect custard texture.

Notes

Keep everything cold to ensure a flaky crust. Do not overwork the dough to avoid toughness. Macerate rhubarb with sugar to reduce moisture and tartness. Use a baking sheet under the pie to catch drips. Cover crust edges with foil if browning too fast. Cool pie completely before slicing for best custard texture. For gluten-free or dairy-free versions, substitute ingredients accordingly.

Nutrition

Keywords: rhubarb custard pie, flaky butter crust, spring dessert, easy pie recipe, rhubarb pie, custard pie, homemade pie crust

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