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Ingredients
For the pie crust
- 2½ cups all-purpose flour
- 1 tsp salt
- 1 tbsp sugar
- 1 cup cold unsalted butter, cubed
- 6–8 tbsp ice water
For the filling
- 5 cups fresh rhubarb, chopped
- 1¼ cups sugar
- ¼ cup brown sugar
- ⅓ cup cornstarch
- 1 tsp vanilla extract
- ½ tsp cinnamon
- 1 tbsp lemon juice
- 1 tbsp butter, cut into small pieces
Optional topping
- 1 egg beaten with 1 tbsp milk (egg wash)
- Coarse sugar for sprinkling
Instructions
Make the crust
- In a large bowl, whisk flour, salt, and sugar.
- Cut in cold butter until mixture resembles coarse crumbs.
- Add ice water a tablespoon at a time until dough comes together.
- Divide dough into two discs, wrap, and chill for at least 1 hour.
Prepare the filling
- In a large bowl, combine rhubarb, sugars, cornstarch, vanilla, cinnamon, and lemon juice.
- Let sit for about 10 minutes.
Assemble the pie
- Preheat oven to 425°F (220°C).
- Roll out one dough disc and place into a 9-inch pie dish.
- Pour in rhubarb filling and dot with butter pieces.
- Roll out second crust and place on top, or create a lattice pattern.
- Trim and crimp edges. Cut slits for steam if using a full top crust.
- Brush with egg wash and sprinkle with coarse sugar if desired.
Bake
- Bake at 425°F (220°C) for 15 minutes.
- Reduce heat to 375°F (190°C) and bake another 40–45 minutes until filling is bubbling and crust is golden.
- Cool for at least 3 hours before slicing so the filling sets properly.
Tips
- If rhubarb is very tart, add an extra ¼ cup sugar.
- Mixing strawberries with rhubarb creates a softer, sweeter flavor.
- Place a baking sheet under the pie to catch bubbling juices.
- Shield crust edges with foil if they brown too quickly.
- Serve with vanilla ice cream or whipped cream for the best balance of tartness.